JP2021035225A - Control board - Google Patents

Abstract

To realize a technology that can reduce the size of a control board in the arrangement direction when a first connection portion connected to a first switching element and a second connection portion connected to a second switching element are alternately arranged in a line one by one along a specified arrangement direction.SOLUTION: N first connection portions 41 and N second connection portions 42 are arranged such that the first connection portion 41 and the second connection portion 42 are alternately arranged in a line along a specified arrangement direction D. Each of first circuit regions A1 is connected to the corresponding first connection portion 41, and is arranged on a first side C1 which is one side of the orthogonal direction C orthogonal to the arrangement direction D with respect to the first connection portion 41, and each of second circuit regions A2 is connected to the corresponding second connection portion 42, and is arranged on a second side C2 which is opposite to the first side C1 in the orthogonal direction C with respect to the second connection portion 42.SELECTED DRAWING: Figure 3

Description

The present invention relates to a control board that controls an inverter.

An example of a control board for controlling an inverter is disclosed in International Publication No. 2019/059292 (Patent Document 1). Hereinafter, the reference numerals shown in parentheses in the description of the background technology are those of Patent Document 1. The control board (9) of Patent Document 1 targets an inverter (10) including a plurality of arms in which an upper switching element (3H) and a lower switching element (3L) are connected in series. Then, in the embodiment shown in FIG. 9 of Patent Document 1, the control board (9) has an arrangement region (upper stage side high voltage region) of the high voltage system circuit (HV) connected to the upper stage side switching element (3H). The high-voltage circuit (HV) arrangement region (lower high-voltage region) connected to the lower switching element (3L) is formed so as to be alternately arranged one by one along a specified arrangement direction, and is adjacent to each other. An insulating region (IS) is formed between the upper high-voltage region and the lower high-voltage region.

International Publication No. 2019/059292

By the way, when the upper switching element is controlled to be on, the potential of the high-voltage circuit connected to the upper switching element rises to the same level as the potential of the positive voltage on the DC side of the inverter. A relatively large potential difference occurs between the high-voltage system circuit connected to the element and the high-voltage system circuit connected to the lower switching element. Therefore, as shown in FIG. 9 of Patent Document 1, the arrangement region (upper stage side high voltage region) of the high voltage system circuit connected to the upper stage side switching element as the first switching element and the second switching element. When the arrangement area of the high-voltage circuit connected to the lower switching element (lower high-voltage area) is arranged alternately one by one along the specified arrangement direction, the adjacent upper high-voltage area and the lower part are arranged. It is necessary to provide an insulating region having an insulating distance corresponding to the relatively large potential difference described above in each of the side high voltage regions, and the control substrate tends to be enlarged in the arrangement direction.

Therefore, when the first connection portion connected to the first switching element and the second connection portion connected to the second switching element are alternately arranged in a line one by one along a predetermined arrangement direction, the arrangement direction is changed. It is desired to realize a technology that can reduce the size of the control board.

The control board according to the present disclosure has N arms in which a first switching element connected to the positive side of direct current and a second switching element connected to the negative side of direct current are connected in series (N is an integer of 2 or more). ) A control board for controlling the inverter provided, which is connected to N first connection portions connected to the first connection terminal of the first switching element and to the second connection terminal of the second switching element, respectively. N pieces of second connection parts to be formed, and N pieces of regions formed in a plate-shaped substrate main body portion and each provided with a first drive circuit for driving the first switching element. A first circuit region, N second circuit regions provided with a second drive circuit for driving the second switching element, N first circuit regions, and N second circuit regions. An insulating region that electrically insulates between the regions is provided, and the N first connecting portions and the N second connecting portions are the first connecting portion and the first connecting portion along a specified arrangement direction. The two connection portions are arranged so as to be arranged alternately one by one, and each of the first circuit regions is connected to the corresponding first connection portion and is connected to the first connection portion. It is arranged on the first side, which is one side in the orthogonal direction orthogonal to the arrangement direction, and each of the second circuit regions is connected to the corresponding second connection portion and is connected to the second connection portion. Therefore, it is arranged on the second side opposite to the first side in the orthogonal direction.

In this configuration, the first circuit region connected to the first connection portion and the second circuit region connected to the second connection portion are arranged with respect to the first connection portion and the second connection portion arranged in the arrangement direction. The first side, which is one side in the orthogonal direction orthogonal to the direction, and the second side, which is the other side, are separately arranged. Therefore, on the second side with respect to the first connection portion and the second connection portion, N second circuit regions provided with the second drive circuits can be arranged side by side in the array direction. Since the N second switching elements have the same potential on the negative electrode side, the potential difference that occurs between the two different second drive circuits is the potential difference that occurs between the first drive circuit and the second drive circuit. It is smaller than the potential difference that occurs between two different first drive circuits. Therefore, on the second side with respect to the first connection portion and the second connection portion, the insulation distance required between the two second circuit regions adjacent to each other in the arrangement direction can be suppressed short, and as a result, the arrangement direction can be suppressed. It is possible to reduce the size of the control board in the above.

Further features and advantages of the control board will be clarified from the following description of embodiments described with reference to the drawings.

The figure which shows the configuration example of the inverter which is the control target of the control board Diagram showing a configuration example of a power supply circuit Top view of the control board according to the embodiment The figure which shows the arrangement relation of the control board and a switching element which concerns on embodiment.

An embodiment of the control board will be described with reference to the drawings. The control board 1 is a board that controls the first inverter 91. As shown in FIG. 1, in the first inverter 91 to be controlled by the control board 1, the first switching element 31 connected to the positive electrode side of the direct current and the second switching element 32 connected to the negative electrode side of the direct current are connected. N arms 33 connected in series (N is an integer of 2 or more) are provided. The first inverter 91 converts electric power between direct current and alternating current and supplies AC electric power to the first alternating current machine 51. The control board 1 controls the first alternator 51 via the first inverter 91. In this embodiment, the first inverter 91 corresponds to the "inverter".

The first AC machine 51 is a device that operates by receiving the supply of AC power. As shown in FIG. 1, in the present embodiment, the first AC machine 51 is a rotary electric machine. Specifically, the first AC machine 51 is a rotary electric machine driven by three-phase (an example of a plurality of phases) AC power composed of U-phase, V-phase, and W-phase, and the first inverter 91 is 3. The phase AC power is supplied to the first AC machine 51 (here, the stator coil 51a). The first alternator 51 is, for example, a rotary electric machine for driving the wheels of a vehicle. In the present specification, "rotary electric machine" is used as a concept including any of a motor (electric motor), a generator (generator), and, if necessary, a motor / generator that functions as both a motor and a generator.

In the present embodiment, the control board 1 also controls the second inverter 92, which is different from the first inverter 91. The second inverter 92 converts electric power between direct current and alternating current and supplies alternating current power to the second alternator 52. The control board 1 controls the second alternator 52 via the second inverter 92. The second AC machine 52 is a device that operates by receiving the supply of AC power. The second AC machine 52 is, for example, a rotary electric machine for driving an auxiliary machine provided in the vehicle. Auxiliary equipment is equipment (accessory equipment, in-vehicle equipment) mounted on a vehicle, and is, for example, an electric oil pump, a compressor for an air conditioner, or the like.

As shown in FIG. 1, the first inverter 91 is connected to the first DC power supply 11 and is connected to the first AC machine 51. The first DC power supply 11 supplies DC power to the DC side of the first inverter 91. The power supply voltage of the first DC power supply 11 is, for example, 200 to 400 [V]. When the first AC machine 51 functions as a motor, the first inverter 91 converts the DC power supplied from the first DC power supply 11 into AC power and supplies it to the first AC power source 51. When the first AC machine 51 functions as a generator, the first inverter 91 converts the AC power supplied from the first AC machine 51 into DC power and supplies it to the first DC power supply 11. A smoothing capacitor 9 for smoothing the voltage on the DC side of the first inverter 91 (DC link voltage Vdc) is provided between the first DC power supply 11 and the first inverter 91. A booster circuit may be provided between the first DC power supply 11 and the first inverter 91, and the voltage of the first DC power supply 11 may be boosted and supplied to the DC side of the first inverter 91.

The second inverter 92 is connected to the first DC power supply 11 and to the second AC machine 52. That is, the first inverter 91 and the second inverter 92 are connected in parallel to the first DC power supply 11, which is a common DC power supply. The first DC power supply 11 supplies DC power to the DC side of the second inverter 92. The second inverter 92 converts the DC power supplied from the first DC power source 11 into AC power and supplies it to the second AC machine 52.

As described above, the first inverter 91 includes N arms 33 in which the first switching element 31 and the second switching element 32 are connected in series. That is, the first inverter 91 includes N first switching elements 31 and N second switching elements 32. In the present embodiment, N is set to the same value as the number of phases of AC power supplied to the first AC machine 51, and specifically, N is 3. The first switching element 31 is a switching element 3 (upper stage switching element) connected to the positive side of the direct current (here, the positive side of the first DC power supply 11), and the second switching element 32 is the negative side of the direct current. It is a switching element 3 (lower stage side switching element) connected to the side (here, the negative side of the first DC power supply 11).

The switching element 3 included in the first inverter 91 is individually switched and controlled by a switching control signal SW described later. As the switching element 3, IGBT (Insulated Gate Bipolar Transistor), Power MOSFET (Metal Oxide Semiconductor Field Effect Transistor), SiC-MOSFET (Silicon Carbide --Metal Oxide Semiconductor FET), SiC-SIT (SiC --Static Induction Transistor), GaN- It is preferable to use a power semiconductor element such as MOSFET (Gallium Nitride-MOSFET). FIG. 1 illustrates a case where an IGBT is used as the switching element 3. The switching element 3 is, for example, a rectangular flat plate-shaped chip-type element. Although not shown, freewheel diodes are connected in parallel to each of the switching elements 3. The freewheel diode is built in, for example, a chip type element constituting the switching element 3.

In the present embodiment, the first inverter 91 includes three arms 33, a U-phase arm 33U, a V-phase arm 33V, and a W-phase arm 33W. The plurality of arms 33 are connected in parallel to each other to form a bridge circuit. The intermediate point of each arm 33 (the connection point between the first switching element 31 and the second switching element 32) is connected to the AC terminal (here, the corresponding phase stator coil 51a) of the first AC machine 51. ..

As described above, the first inverter 91 is configured by using a plurality of switching elements 3 (specifically, a plurality of first switching elements 31 and a plurality of second switching elements 32). Although details are omitted, the second inverter 92 is configured by using a plurality of third switching elements 93. The third switching element 93 included in the second inverter 92 is different from, for example, the switching element 3 included in the first inverter 91 in electrical characteristics (rated current, withstand voltage, etc.). The second inverter 92 includes, for example, a bridge circuit similar to that of the first inverter 91.

The control signals (switching control signal SW) of the first switching element 31 and the second switching element 32 are generated by the control circuit 5. The control circuit 5 generates a first switching control signal SW1 for switching control of the first switching element 31 and a second switching control signal SW2 for switching control of the second switching element 32. That is, the control circuit 5 generates the first switching control signal SW1 and the second switching control signal SW2 as the switching control signal SW. The control circuit 5 is configured with a logic circuit such as a microcomputer as a core. Each function of the control circuit 5 is realized by cooperation between hardware such as a microcomputer and software (program), for example.

The control circuit 5 controls the first inverter 91 by generating a switching control signal SW. The control circuit 5 controls the first inverter 91, for example, based on a command from another control device (for example, a vehicle control device that integrally controls the entire vehicle). The control circuit 5 performs current feedback control using, for example, a vector control method, and controls the first inverter 91 so that the first alternator 51 outputs the torque commanded by another control device. In the example shown in FIG. 1, the current flowing through the stator coils 51a of each phase of the first AC machine 51 is detected by the current sensor 14, and the magnetic pole position of the rotor of the first AC machine 51 is detected by the rotation sensor 15. The control circuit 5 controls the first inverter 91 by using the detection results of the current sensor 14 and the rotation sensor 15.

The operating voltage of the control circuit 5 (for example, 5 [V], 3.3 [V], 2.5 [V], etc.) is generated based on the DC power supplied from the second DC power supply 12. The second DC power supply 12 is a DC power supply having a lower power supply voltage than the first DC power supply 11. The power supply voltage of the second DC power supply 12 is, for example, 12 to 24 [V]. The first DC power supply 11 and the second DC power supply 12 are insulated from each other and are in a floating relationship with each other. Although not shown, the power supply circuit that supplies electric power (operating power) to the control circuit 5 is, for example, input to the power input circuit connected to the second DC power supply 12 and the power input circuit from the second DC power supply 12. It is provided with a voltage adjusting circuit for adjusting the voltage. The power input circuit is configured by using, for example, a noise filter, a smoothing capacitor, and a regulator circuit, and the voltage adjusting circuit is configured by using, for example, a regulator element.

The switching control signal SW generated by the control circuit 5 is input to the control terminal of the switching element 3 to be controlled (in the example shown in FIG. 1, the gate terminal of the IGBT) via the drive circuit 2. That is, the drive circuit 2 drives the switching element 3 based on the switching control signal SW. In the example shown in FIG. 1, the drive circuit 2 drives the switching element 3 by controlling the potential difference between the two terminals of the gate terminal and the emitter terminal of the switching element 3 (IGBT). As shown in FIG. 1, the drive circuit 2 is provided corresponding to each of the plurality of switching elements 3. The plurality of drive circuits 2 include a first drive circuit 21 that drives the first switching element 31 and a second drive circuit 22 that drives the second switching element 32. The first drive circuit 21 drives the first switching element 31 based on the first switching control signal SW1. Further, the second drive circuit 22 drives the second switching element 32 based on the second switching control signal SW2.

The drive circuit 2 enhances the drive capability of the switching control signal SW generated by the control circuit 5 (for example, the ability to operate a subsequent circuit such as voltage amplitude or output current) and supplies it to the control terminal of the switching element 3. The drive circuit 2 is configured by using, for example, a push-pull circuit in which two transistors are connected in series. Here, the circuit formed on the control board 1 includes a high-voltage system circuit having a relatively high operating voltage and a low-voltage system circuit having a relatively low operating voltage. The high-voltage circuit and the low-voltage circuit are isolated from each other. The control circuit 5 that generates the switching control signal SW is a low-voltage system circuit. On the other hand, the drive circuit 2 is a high-voltage system circuit. Therefore, the control board 1 is provided with an insulating element (insulating element for signal transmission) such as a photocoupler or a magnetic coupler, and this insulating element transmits the switching control signal SW generated by the control circuit 5 to the drive circuit 2. Transmit in an insulated state (electrically insulated state). Specifically, the control board 1 includes a first insulating element 61a, which is an insulating element for transmitting the first switching control signal SW1 generated by the control circuit 5 to the first drive circuit 21 in an insulated state, and the control circuit 5. The second insulating element 62a, which is an insulating element for transmitting the second switching control signal SW2 generated by the above to the second drive circuit 22 in an insulated state, is provided.

Electric power (operating power) is supplied to each of the drive circuits 2 from the power supply circuit 4. As shown in FIG. 2 as an example of the power supply circuit 4, the power supply circuit 4 supplies electric power to the drive circuit 2 by using a transformer. Specifically, the power supply circuit 4 uses the first transformer 61b to supply electric power to the first drive circuit 21, and the second transformer 62b to supply electric power to the second drive circuit 22. The power supply circuit 4 outputs an upper stage drive voltage VH supplied to the first drive circuit 21 and a lower stage drive voltage VL supplied to the second drive circuit 22. The potential difference between the upper drive voltage VH and the lower drive voltage VL is, for example, 15 to 20 [V].

In the present embodiment, the power supply circuit 4 outputs three upper drive voltages VH, that is, the U-phase upper stage drive voltage VHU, the V-phase upper stage drive voltage VHV, and the W-phase upper stage drive voltage VHW, and is used for the U-phase lower stage. The drive voltage VLU, the drive voltage VLV for the lower stage of the V phase, and the drive voltage VLW for the lower stage of the W phase are output. The U-phase upper stage drive voltage VHU is supplied to the first drive circuit 21 that drives the first switching element 31 (U-phase first switching element 31) included in the U-phase arm 33U, and the U-phase lower stage drive voltage VLU is , Is supplied to the second drive circuit 22 that drives the second switching element 32 (U-phase second switching element 32) included in the U-phase arm 33U. The V-phase upper stage drive voltage VHV is supplied to the first drive circuit 21 that drives the first switching element 31 (V-phase first switching element 31) included in the V-phase arm 33V, and the V-phase lower stage drive voltage VLV is , Is supplied to the second drive circuit 22 that drives the second switching element 32 (V-phase second switching element 32) included in the V-phase arm 33V. The W-phase upper stage drive voltage VHW is supplied to the first drive circuit 21 that drives the first switching element 31 (W-phase first switching element 31) included in the W-phase arm 33W, and the W-phase lower stage drive voltage VLW is , Is supplied to the second drive circuit 22 that drives the second switching element 32 (W-phase second switching element 32) included in the W-phase arm 33W.

As shown in FIG. 2, the primary winding L1 of the first transformer 61b and the primary winding L1 of the second transformer 62b have a drive switching element 7 for controlling the supply of electric power to the primary winding L1. It is connected. The drive switching element 7 is switched and controlled by the power supply control circuit 75. In the example shown in FIG. 2, the power supply circuit 4 is a push-pull type switching power supply circuit, and the primary winding L1 has two drives, a first drive switching element 71 and a second drive switching element 72. The switching element 7 is connected. The first drive switching element 71 and the second drive switching element 72 are complementarily controlled by the power supply control circuit 75.

FIG. 2 shows a drive switching element 7 (here, a first drive switching element 71 and a second drive switching) common to the six transformers (three first transformers 61b and three second transformers 62b). Although the configuration in which (a set of elements 72) is provided is illustrated, the transformers are divided into a plurality of groups (for example, a group consisting of two transformers), and the driving switching element 7 (for example, the first) is provided for the plurality of groups. 1) a set of the driving switching element 71 and the second driving switching element 72) may be provided separately. Further, here, as an example, the power supply circuit 4 is a push-pull type switching power supply circuit, but the power supply circuit 4 is a push-pull type such as a half bridge type, a full bridge type, a single forward type, and a flyback type. A switching power supply circuit of a method other than the above may be used.

The input voltage V1 (primary side voltage) input to the primary winding L1 of the first transformer 61b and the primary winding L1 of the second transformer 62b is from the power supply voltage of the second DC power supply 12 to the power supply circuit (voltage regulator). Etc.). Therefore, the input voltage V1 is stable, and in this power supply circuit 4, the output voltage (2) output from the secondary winding L2 of the first transformer 61b by the transformation ratio of the first transformer 61b without performing feedback control. The secondary voltage) is determined, and the output voltage (secondary voltage) output from the secondary winding L2 of the second transformer 62b is determined by the transformation ratio of the second transformer 62b. The secondary side voltage (upper stage drive voltage VH) of the first transformer 61b is supplied to the first drive circuit 21, and the secondary side voltage (lower stage drive voltage VL) of the second transformer 62b is the second drive circuit 22. Is supplied to. In the example shown in FIG. 2, the AC voltage generated in the secondary winding L2 is converted into a DC voltage by a rectifying circuit 76 provided with a rectifying diode 74 and a smoothing capacitor 73, thereby converting the secondary side voltage. Is generated.

Next, the configuration of the control board 1 will be described. As shown in FIGS. 3 and 4, the control board 1 has N first connection portions 41 connected to the first connection terminals 81 of the first switching element 31, respectively, and the second connection of the second switching element 32. It includes N second connection portions 42, which are connected to the terminals 82, respectively. As described above, in this embodiment, N is 3. The first switching element 31 includes at least a first connection terminal 81 connected to the control terminal of the first switching element 31, and the second switching element 32 is connected to the control terminal of the second switching element 32. Two connection terminals 82 are provided at least.

In the N first connection portions 41 and the N second connection portions 42, the first connection portion 41 and the second connection portion 42 are alternately arranged in a line along the specified arrangement direction D. Have been placed. That is, as shown in FIG. 4, the control board 1 is connected to a first inverter 91 having a configuration in which the first switching element 31 and the second switching element 32 are arranged alternately one by one in a row. To. The arrangement interval of the first connection portion 41 and the second connection portion 42 in the arrangement direction D is an interval according to the arrangement interval between the first switching element 31 and the second switching element 32. Although not shown, the first switching element 31 and the second switching element 32 are arranged on a substrate different from the control substrate 1.

As shown in FIG. 4, in the present embodiment, the first switching element 31 includes M (M is an integer of 2 or more) first connection terminals 81, and the second switching element 32 has L (L is an integer of 2 or more). A second connection terminal 82 (an integer of 2 or more) is provided. Then, as shown in FIG. 3, the first connection portion 41 includes M third connection terminals 83 connected to the first connection terminals 81 of the first switching element 31, respectively, and the second connection portion 42 includes. It includes L fourth connection terminals 84 connected to the second connection terminals 82 of the second switching element 32, respectively. For example, the third connection terminal 83 is provided with a hole portion that penetrates the control board 1 (specifically, the substrate main body portion 10 described later), and the first connection terminal 81 is arranged so as to penetrate the hole portion. In this state, the first connection terminal 81 and the third connection terminal 83 can be electrically connected to each other. Further, for example, the fourth connection terminal 84 is provided with a hole portion penetrating the control board 1 (specifically, the substrate main body portion 10), and the second connection terminal 82 is arranged so as to penetrate the hole portion. In this state, the second connection terminal 82 and the fourth connection terminal 84 can be electrically connected to each other.

The M third connection terminals 83 included in the first first connection portion 41 are arranged so as to be arranged in a line along the arrangement direction D, and the L fourth connection terminals 84 included in the second connection portion 42 are provided. Are arranged in a row along the arrangement direction D. The third connection terminal 83 and the fourth connection terminal 84 are arranged so as to be arranged in a line along the arrangement direction D. Specifically, a group of M third connection terminals 83 arranged in the arrangement direction D and a group of L fourth connection terminals 84 arranged in the arrangement direction D are alternately arranged in a line along the arrangement direction D. They are arranged side by side.

In the present embodiment, the chip-type elements constituting the first switching element 31 include a current detection circuit for detecting the current flowing through the first switching element 31 and a temperature detection circuit for detecting the temperature of the first switching element 31. And are built-in. Then, the first switching element 31 includes a first connection terminal 81 connected to the control terminal of the first switching element 31, two first connection terminals 81 for acquiring the detection result of the current detection circuit, and a temperature. A total of five first connection terminals 81 are provided, including two first connection terminals 81 for acquiring the detection result of the detection circuit. That is, in this embodiment, M is 5.

Further, in the present embodiment, the chip type elements constituting the second switching element 32 include a current detection circuit for detecting the current flowing through the second switching element 32 and a temperature for detecting the temperature of the second switching element 32. It has a built-in detection circuit. Then, the second switching element 32 includes a second connection terminal 82 connected to the control terminal of the second switching element 32, two second connection terminals 82 for acquiring the detection result of the current detection circuit, and a temperature. A total of five second connection terminals 82 are provided, including two second connection terminals 82 for acquiring the detection result of the detection circuit. That is, in this embodiment, L is 5. As described above, in the present embodiment, M and L are the same number as each other.

The control board 1 includes a plate-shaped board main body 10. In the present embodiment, the substrate main body 10 is formed in a rectangular shape in a plan view (direction view along the thickness direction of the substrate main body 10). The above-mentioned arrangement direction D is defined so as to be along the plate surface of the substrate main body 10. That is, the arrangement direction D is a direction orthogonal to the thickness direction of the substrate main body 10. Here, the direction orthogonal to the arrangement direction D is defined as the orthogonal direction C. The orthogonal direction C is defined so as to be along the plate surface of the substrate main body 10. Then, one side of the orthogonal direction C is designated as the first side C1, and the other side of the orthogonal direction C (that is, the side opposite to the first side C1 in the orthogonal direction C) is designated as the second side C2. Further, one side of the arrangement direction D is the third side D1, and the other side of the arrangement direction D (that is, the side opposite to the third side D1 in the arrangement direction D) is the fourth side D2.

As shown in FIGS. 3 and 4, the arrangement direction D of the first connection portion 41 and the second connection portion 42 is such that the second connection portion 42 is arranged at the end of the third side D1 and the second connection portion 42 is arranged on the fourth side. The first connection portion 41 is set to be arranged at the end portion of D2. That is, from the fourth side D2 to the third side D1, the first connection portion 41 and the second connection portion 42 are alternately arranged one by one in order from the first connection portion 41. In the present embodiment, a set of one first connecting portion 41 and one second connecting portion 42 arranged adjacent to the third side D1 with respect to the first connecting portion 41 is used as a connecting portion set. As shown in FIG. 4, the first connecting portion 41 and the second connecting portion 42 constituting one connecting unit set are connected in series with the first switching element 31 and the second switching element 32 having the same phase as each other. It is connected to the first switching element 31 and the second switching element 32), respectively.

The control board 1 is a region formed in the board main body 10, and includes N first circuit areas A1, N second circuit areas A2, and N first circuit areas A1 and N. An insulating region B that electrically insulates between the regions of the second circuit region A2 is provided. That is, the region formed in the substrate main body 10 includes a first circuit region A1, a second circuit region A2, and an insulating region B. As shown briefly in FIG. 3, each of the N first circuit regions A1 is provided with a first drive circuit 21, and each of the N second circuit regions A2 is provided with a second drive circuit 22. Has been done. That is, the first circuit region A1 and the second circuit region A2 are high-voltage regions in which the high-voltage system circuit (specifically, the drive circuit 2) is arranged. Although not shown, a rectifying circuit 76 included in the power supply circuit 4 (specifically, a rectifying circuit 76 connected to the secondary winding L2 of the first transformer 61b) is arranged in the first circuit region A1. In the second circuit region A2, a rectifying circuit 76 included in the power supply circuit 4 (specifically, a rectifying circuit 76 connected to the secondary winding L2 of the second transformer 62b) is arranged.

As shown in FIG. 3, each of the first circuit regions A1 is connected to the corresponding first connection portion 41 and is arranged on the first side C1 with respect to the first connection portion 41. That is, N first circuit regions A1 are arranged so as to be arranged in the arrangement direction D on the first side C1 with respect to the first connection portion 41 and the second connection portion 42. Further, each of the second circuit regions A2 is connected to the corresponding second connection portion 42 and is arranged on the second side C2 with respect to the second connection portion 42. That is, N second circuit regions A2 are arranged so as to be arranged in the arrangement direction D on the second side C2 with respect to the first connection portion 41 and the second connection portion 42.

As shown in FIG. 4, in the present embodiment, the second connection portion 42 (U-phase second connection portion 42) connected to the second connection terminal 82 of the U-phase second switching element 32 and the U-phase It is connected to the first connection portion 41 (U-phase first connection portion 41) connected to the first connection terminal 81 of the first switching element 31 and the second connection terminal 82 of the V-phase second switching element 32. The first connection portion 41 (V-phase first connection portion 41) connected to the second connection portion 42 (V-phase second connection portion 42) and the first connection terminal 81 of the V-phase first switching element 31. The second connection portion 42 (the second connection portion 42 of the W phase) connected to the second connection terminal 82 of the second switching element 32 of the W phase, and the first connection terminal of the first switching element 31 of the W phase. The first connection portion 41 (W-phase first connection portion 41) connected to the 81 is arranged so as to be arranged in the order described from the third side D1.

Therefore, in the first side C1 with respect to the first connection portion 41 and the second connection portion 42, the first circuit region A1 connected to the first connection portion 41 of the U phase (the first circuit region A1 of the U phase). The first circuit region A1 (V-phase first circuit region A1) connected to the V-phase first connection portion 41 and the first circuit region A1 (W) connected to the W-phase first connection portion 41. The first circuit region A1) of the phase is arranged so as to be arranged in the order described from the third side D1. Further, in the second side C2 with respect to the first connection portion 41 and the second connection portion 42, the second circuit region A2 connected to the second connection portion 42 of the U phase (the second circuit region A2 of the U phase). The second circuit region A2 (V-phase second circuit region A2) connected to the V-phase second connection portion 42, and the second circuit region A2 (W) connected to the W-phase second connection portion 42. The second circuit region A2) of the phase is arranged so as to be arranged in the order described from the third side D1. As a result, as shown in FIG. 3, the substrate main body 10 includes a U-phase circuit region AU including a U-phase first circuit region A1 and a U-phase second circuit region A2, and a V-phase first circuit region. The V-phase circuit region AV including the second circuit region A2 of the A1 and the V phase and the W-phase circuit region AW including the first circuit region A1 of the W phase and the second circuit region A2 of the W phase are the third side D1. It is formed so as to be arranged in the order described from.

Each of the first circuit regions A1 includes a first main body portion A10 formed so as to extend from a connection portion with the first connection portion 41 to the first side C1. In the present embodiment, the first main body A10 is formed in a rectangular shape (specifically, a rectangular shape having two sides along the arrangement direction D and two sides along the orthogonal direction C) in a plan view. Each of the first circuit regions A1 further includes a first expansion portion A11 formed so as to extend from the first main body portion A10 in the arrangement direction D. In the present embodiment, the first expansion portion A11 is formed so as to extend from the first main body portion A10 to the third side D1. Further, in the present embodiment, the first expansion portion A11 is formed in a rectangular shape in a plan view (specifically, a rectangular shape having two sides along the arrangement direction D and two sides along the orthogonal direction C). .. The width of the first expansion portion A11 in the orthogonal direction C is narrower than the width of the first main body portion A10 in the orthogonal direction C. The end of the first side C1 of the first expansion portion A11 is arranged at the same position in the orthogonal direction C as the end of the first side C1 of the first main body portion A10.

Each of the second circuit regions A2 includes a second main body portion A20 formed so as to extend from the connection portion with the second connection portion 42 to the second side C2. In the present embodiment, the second main body A20 is formed in a rectangular shape (specifically, a rectangular shape having two sides along the arrangement direction D and two sides along the orthogonal direction C) in a plan view. Each of the second circuit regions A2 further includes a second expansion portion A21 formed so as to extend from the second main body portion A20 in the arrangement direction D. In the present embodiment, the second expansion portion A21 is formed so as to extend from the second main body portion A20 to the fourth side D2. Further, in the present embodiment, the second expansion portion A21 is formed in a rectangular shape in a plan view (specifically, a rectangular shape having two sides along the arrangement direction D and two sides along the orthogonal direction C). .. The width of the second expansion portion A21 in the orthogonal direction C is narrower than the width of the second main body portion A20 in the orthogonal direction C. The end of the second side C2 of the second expansion portion A21 is arranged at the same position in the orthogonal direction C as the end of the second side C2 of the second main body portion A20.

The first expansion portion A11 is arranged so as to be separated from the second main body portion A20 on the first side C1 and the arrangement region in the arrangement direction D overlaps with the second main body portion A20. The first expansion portion A11 is arranged adjacent to the first side C1 with the insulating region B interposed therebetween with respect to the second main body portion A20. In the present embodiment, the first circuit area A1 connected to the first connection part 41 and the second circuit area connected to the second connection part 42 adjacent to the third side D1 with respect to the first connection part 41. Between A2 (that is, between the first circuit region A1 and the second circuit region A2 in the same phase), the first expansion portion A11 is separated from the second main body portion A20 on the first side C1. At the same time, the second main body A20 and the arrangement area D in the arrangement direction D are arranged so as to overlap each other.

The second expansion portion A21 is arranged so as to be separated from the first main body portion A10 on the second side C2 and the arrangement region in the arrangement direction D overlaps with the first main body portion A10. The second expansion portion A21 is arranged adjacent to the second side C2 with the insulating region B interposed therebetween with respect to the first main body portion A10. In the present embodiment, the first circuit area A1 connected to the first connection part 41 and the second circuit area connected to the second connection part 42 adjacent to the third side D1 with respect to the first connection part 41. The second expansion portion A21 is separated from the first main body portion A10 on the second side C2 between the first circuit region A1 and the second circuit region A2 having the same phase with each other (that is, between the first circuit region A1 and the second circuit region A2). At the same time, the first main body portion A10 and the arrangement area in the arrangement direction D are arranged so as to overlap each other.

The insulation region B is a first insulation that electrically insulates between one first main body portion A10 and the other first expansion portion A11 of two first circuit regions A1 arranged adjacent to each other in the arrangement direction D. A second insulating region that electrically insulates between the region B1 and one of the second main body A20 and the other second expansion A21 of the two second circuit regions A2 arranged adjacent to the arrangement direction D. It is equipped with B2. In the present embodiment, the first insulation region B1 is the first main body portion A10 of the first circuit region A1 and the first circuit region A1 arranged adjacent to the fourth side D2 with respect to the first circuit region A1. It is formed between the first expansion portion A11 and the above. Further, in the present embodiment, the second insulation region B2 is the second main body portion A20 of the second circuit region A2 and the second circuit arranged adjacent to the third side D1 with respect to the second circuit region A2. It is formed between the region A2 and the second expansion portion A21. Then, in the present embodiment, the width of the arrangement direction D of the second insulation region B2 is narrower than the width of the arrangement direction D of the first insulation region B1.

The control board 1 is a region formed in the board main body 10, and is electrically connected to each of N first circuit regions A1 and N second circuit regions A2 by an insulating region B. It is provided with a third circuit area A3 which is insulated from the above. As shown briefly in FIG. 3, a control circuit 5 is provided in the third circuit region A3. That is, the third circuit region A3 is a low-voltage region in which the low-voltage system circuit (specifically, the control circuit 5) is arranged. Although not shown, the drive switching element 7 and the power supply control circuit 75 included in the power supply circuit 4 are also arranged in the third circuit region A3.

In the present embodiment, the third circuit region A3 is arranged with the first side portion A31 which is formed so as to extend in the arrangement direction D and is arranged on the first side C1 with respect to the N first circuit regions A1. A second side portion A32, which is formed so as to extend in the direction D and is arranged on the second side C2 with respect to N second circuit regions A2, is provided. The first side portion A31 is arranged adjacent to the first side C1 with the insulation region B interposed therebetween with respect to the N first circuit regions A1, and the second side portion A32 has N second circuit regions A2. It is arranged adjacent to the second side C2 with the insulating region B interposed therebetween. The third circuit region A3 is further formed so as to extend in the orthogonal direction C, and includes a connecting portion A33 that connects the first side portion A31 and the second side portion A32. In the present embodiment, the connection portion A33 is arranged on the fourth side D2 with respect to the N first circuit regions A1 and the N second circuit regions A2. In the present embodiment, the control circuit 5 is provided in the first side portion A31. Further, in the present embodiment, the width of the second side portion A32 in the orthogonal direction C is narrower than the width of the first side portion A31 in the orthogonal direction C.

The control board 1 is a region formed in the board main body 10, and is a fifth circuit area A5 provided with a voltage detection circuit 6 for detecting a DC link voltage Vdc (voltage on the DC side of the first inverter 91). It has. The voltage detection circuit 6 includes, for example, a plurality of resistors (voltage dividing resistors) connected in series between the positive and negative electrodes on the DC side of the first inverter 91, and a voltage value obtained by dividing the DC link voltage Vdc by resistance. It is provided with a voltage sensor (voltage detection IC or the like) for detecting the above.

In this embodiment, the fifth circuit area A5 is connected to any of the N second circuit areas A2. Here, the fifth circuit region A5 is connected to the second circuit region A2 (U-phase second circuit region A2) arranged on the third side D1 most. Specifically, the fifth circuit region A5 is formed so as to extend the third side D1 in the orthogonal direction C with respect to the N first circuit regions A1 and the N second circuit regions A2. The fifth circuit area A5 is the end of the third side D1 of the second circuit area A2 (specifically, the second main body portion A20 included in the second circuit area A2) arranged on the third side D1. It is connected to the part.

In the present embodiment, the control board 1 further includes a fourth circuit area A4 in which the third drive circuit 23 is provided, which is a region formed in the board body 10. The third drive circuit 23 is a drive circuit that drives the second inverter 92. The control signal of the third switching element 93 included in the second inverter 92 is input to the control terminal of the third switching element 93 via the third drive circuit 23. In addition to the third drive circuit 23, a control circuit that generates a control signal of the third switching element 93 may be provided in the fourth circuit region A4. Further, the third switching element 93 may be provided in the fourth circuit region A4. In this case, for example, the third drive circuit 23 together with the third switching element 93 included in the second inverter 92 IPM ( It may be built in a unit such as Intelligent Power Module).

In the present embodiment, the fourth circuit region A4 is formed so as to extend in the arrangement direction D, and is arranged adjacent to the second side C2 with the insulating region B interposed therebetween with respect to the second side portion A32. ing. Specifically, the insulation region B includes a third insulation region B3 that electrically insulates between the fourth circuit region A4 and the second side portion A32. The fourth circuit region A4 is arranged adjacent to the second side C2 with the third insulation region B3 interposed therebetween with respect to the second side portion A32. Since the second side portion A32 is a low voltage region, the fourth circuit region A4 is placed on the second side C2 with the third insulation region B3 interposed therebetween with respect to the high voltage region such as the first circuit region A1 and the second circuit region A2. It is easier to narrow the width of the third insulating region B3 in the orthogonal direction C as compared with the case where the third insulating region B3 is arranged adjacent to each other, which makes it possible to reduce the size of the control board 1 in the orthogonal direction C. ing.

As shown in FIG. 3, the control board 1 electrically insulates between the first circuit region A1 and the third circuit region A3, and the first circuit region A1 and the third circuit region A3 (specifically, specifically, the third circuit region A3). The first connecting member 61 that transmits a signal or power to and from the first side portion A31), and the second circuit region A2 while electrically insulating between the second circuit region A2 and the third circuit region A3. It includes a second connecting member 62 that transmits a signal or power to and from the third circuit region A3 (specifically, the second side portion A32). The first connecting member 61 is arranged on the first side C1 with the first circuit region A1 interposed therebetween with respect to the first connecting portion 41, and the second connecting member 62 has a second circuit region with respect to the second connecting portion 42. It is arranged on the second side C2 with A2 in between. The control board 1 includes N first connecting members 61 corresponding to N first circuit areas A1 and N second connecting members 62 corresponding to N second circuit areas A2. I have.

The first connecting member 61 transmits electric power between the first insulating element 61a that transmits a signal between the first circuit area A1 and the third circuit area A3, and between the first circuit area A1 and the third circuit area A3. It includes a first transformer 61b for transmission. The first insulating element 61a is arranged so as to connect the first circuit region A1 and the third circuit region A3 (specifically, the first side portion A31) across the insulating region B. Then, in order to input the first switching control signal SW1 generated by the control circuit 5 to the first drive circuit 21, the first insulating element 61a sends the first switching control signal SW1 from the third circuit area A3 to the first circuit area. Communicate to A1. In the present embodiment, in order to input the detection result by the current detection circuit and the temperature detection circuit included in the first switching element 31 into the control circuit 5, the first insulation element 61a transmits a signal representing the detection result to the first circuit region. It is transmitted from A1 to the third circuit region A3. The first drive circuit 21 includes a main circuit such as a push-pull circuit in which two transistors are connected in series, and a signal transmission circuit that transmits a signal between the main circuit and the first connection unit 41. Therefore, for example, when the main circuit of the first drive circuit 21 and the first insulating element 61a are incorporated in one package as the first insulating element 61a, the signal transmission circuit of the first drive circuit 21 is used. Is provided in the first circuit area A1.

The first transformer 61b is arranged so as to connect the first circuit region A1 and the third circuit region A3 (specifically, the first side portion A31) across the insulation region B. Specifically, the primary winding L1 of the first transformer 61b is connected to the third circuit region A3 (specifically, the first side portion A31), and the secondary winding L2 of the first transformer 61b is connected to the third circuit region A3 (specifically, the first side portion A31). It is connected to the first circuit area A1. Then, the first transformer 61b transmits electric power from the third circuit region A3 to the first circuit region A1 in order to supply the secondary side voltage output from the secondary winding L2 to the first drive circuit 21.

The second connecting member 62 transmits power between the second insulating element 62a, which transmits a signal between the second circuit region A2 and the third circuit region A3, and the second circuit region A2 and the third circuit region A3. A second transformer 62b for transmission is provided. The second insulating element 62a is arranged so as to connect the second circuit region A2 and the third circuit region A3 (specifically, the second side portion A32) across the insulating region B. Then, in order to input the second switching control signal SW2 generated by the control circuit 5 to the second drive circuit 22, the second insulating element 62a sends the second switching control signal SW2 from the third circuit area A3 to the second circuit area. Communicate to A2. In the present embodiment, the second insulating element 62a inputs a signal representing the detection result to the control circuit 5 in order to input the detection result by the current detection circuit or the temperature detection circuit included in the second switching element 32 to the second circuit region. It is transmitted from A2 to the third circuit region A3. The second drive circuit 22 includes a main circuit such as a push-pull circuit in which two transistors are connected in series, and a signal transmission circuit that transmits a signal between the main circuit and the second connection portion 42. Therefore, for example, when the main circuit of the second drive circuit 22 and the second insulating element 62a are incorporated in one package as the second insulating element 62a, the signal transmission circuit of the second drive circuit 22 is used. Is provided in the second circuit area A2.

The second transformer 62b is arranged so as to connect the second circuit region A2 and the third circuit region A3 (specifically, the second side portion A32) across the insulation region B. Specifically, the primary winding L1 of the second transformer 62b is connected to the third circuit region A3 (specifically, the second side portion A32), and the secondary winding L2 of the second transformer 62b is connected to the third circuit region A3 (specifically, the second side portion A32). It is connected to the second circuit area A2. Then, the second transformer 62b transmits electric power from the third circuit region A3 to the second circuit region A2 in order to supply the secondary side voltage output from the secondary winding L2 to the second drive circuit 22.

As described above, in the present embodiment, the fifth circuit area A5 in which the voltage detection circuit 6 is provided is connected to the second circuit area A2. Therefore, for example, the electric power transmitted to the second circuit region A2 by the second transformer 62b can be supplied as operating power to the voltage detection circuit 6 in addition to the second drive circuit 22. Further, in order to input the detection result by the voltage detection circuit 6 to the control circuit 5, for example, the signal representing the detection result is transmitted by the second insulating element 62a connecting the second circuit area A2 and the third circuit area A3. , Can be configured to be transmitted to the third circuit region A3.

As shown in FIG. 3, in the present embodiment, at least a part of the first connecting member 61 is arranged so as to overlap with the second main body portion A20 with respect to the arrangement region in the arrangement direction D. Specifically, regarding the arrangement region in the arrangement direction D, the first insulating element 61a is arranged so as to overlap the first main body portion A10, and the first transformer 61b overlaps with the second main body portion A20. It is arranged like this. Here, with respect to the arrangement region in the arrangement direction D, the entire first insulating element 61a is arranged so as to overlap the first main body portion A10, and the entire first transformer 61b is arranged with the second main body portion A20. They are arranged so that they overlap.

In the present embodiment, the first insulating element 61a is arranged so as to connect the first main body portion A10 and the third circuit region A3 (specifically, the first side portion A31), and the first transformer 61b is arranged. It is arranged so as to connect the first expansion portion A11 and the third circuit region A3 (specifically, the first side portion A31). Then, in the present embodiment, the first drive circuit 21 is provided in the first main body portion A10. As a result, signal transmission provided in the first circuit region A1 (specifically, the first main body portion A10) so as to connect the first insulating element 61a and the first connection portion 41 via the first drive circuit 21. It is possible to make the route a route close to a straight line along the orthogonal direction C. The electric power supplied to the first expansion unit A11 by the first transformer 61b is supplied to the first drive circuit 21 via the circuit provided in the first expansion unit A11.

Further, as shown in FIG. 3, in the present embodiment, at least a part of the second connecting member 62 is arranged so as to overlap with the first main body portion A10 with respect to the arrangement area in the arrangement direction D. Specifically, regarding the arrangement region in the arrangement direction D, the second insulating element 62a is arranged so as to overlap the second main body portion A20, and the second transformer 62b overlaps with the first main body portion A10. It is arranged like this. Here, with respect to the arrangement region in the arrangement direction D, the entire second insulating element 62a is arranged so as to overlap the second main body portion A20, and the entire second transformer 62b is arranged with the first main body portion A10. They are arranged so that they overlap.

In the present embodiment, the second insulating element 62a is arranged so as to connect the second main body portion A20 and the third circuit region A3 (specifically, the second side portion A32), and the second transformer 62b is arranged. It is arranged so as to connect the second expansion portion A21 and the third circuit region A3 (specifically, the second side portion A32). Then, in the present embodiment, the second drive circuit 22 is provided in the second main body portion A20. As a result, signal transmission provided in the second circuit region A2 (specifically, the second main body portion A20) so as to connect the second insulating element 62a and the second connecting portion 42 via the second drive circuit 22. It is possible to make the route a route close to a straight line along the orthogonal direction C. The electric power supplied to the second expansion unit A21 by the second transformer 62b is supplied to the second drive circuit 22 via the circuit provided in the second expansion unit A21.

[Other Embodiments]
Next, other embodiments of the control board will be described.

(1) In the above embodiment, the first insulating element 61a is arranged so as to overlap the first main body portion A10 and the first transformer 61b is arranged so as to overlap the first main body portion A20 with respect to the arrangement region in the arrangement direction D. The second insulating element 62a is arranged so as to overlap with the second main body portion A20, and the second transformer 62b is arranged with the first main body portion A10 with respect to the arrangement region in the arrangement direction D. An example of a configuration in which they are arranged so as to overlap has been described. However, the present disclosure is not limited to such a configuration. For example, with respect to the arrangement region in the arrangement direction D, the first transformer 61b is arranged so as to overlap the first main body portion A10, and the first insulating element 61a is arranged. However, it may be configured to be arranged so as to overlap with the second main body portion A20. Further, for example, with respect to the arrangement region in the arrangement direction D, the second transformer 62b is arranged so as to overlap the second main body portion A20, and the second insulating element 62a overlaps with the first main body portion A10. It can also be configured to be arranged.

(2) In the above embodiment, at least a part of the first connecting member 61 is arranged so as to overlap the second main body A20 with respect to the arrangement area of the arrangement direction D, and the arrangement area of the arrangement direction D is the first. The configuration in which at least a part of the two connecting members 62 is arranged so as to overlap the first main body portion A10 has been described as an example. However, the present disclosure is not limited to such a configuration, and the first connecting member 61 does not have a portion overlapping with the second main body portion A20 with respect to the arrangement region in the arrangement direction D (for example, the arrangement in the arrangement direction D). With respect to the region, both the first insulating element 61a and the first transformer 61b may be arranged so as to overlap the first main body portion A10). Further, regarding the arrangement region in the arrangement direction D, the second connecting member 62 does not have a portion overlapping with the first main body portion A10 (for example, regarding the arrangement region in the arrangement direction D, the second insulating element 62a and the second transformer). Both of 62b may be arranged so as to overlap with the second main body A20).

(3) In the above embodiment, the configuration in which the control board 1 includes the fourth circuit area A4 in which the third drive circuit 23 is provided has been described as an example. However, the present disclosure is not limited to such a configuration, and the control board 1 does not include the fourth circuit area A4 in which the third drive circuit 23 is provided (that is, the control board 1 controls the second inverter 92). It is also possible to make a configuration in which the above is not performed.

(4) The configurations disclosed in each of the above-described embodiments shall be applied in combination with the configurations disclosed in the other embodiments as long as there is no contradiction (the embodiments described as the other embodiments are used). (Including combinations) is also possible. With respect to other configurations, the embodiments disclosed herein are merely exemplary in all respects. Therefore, various modifications can be made as appropriate without departing from the gist of the present disclosure.

[Outline of the above-described embodiment]
Hereinafter, the outline of the control board described above will be described.

N arms (33) (N is 2 or more) in which the first switching element (31) connected to the positive side of the direct current and the second switching element (32) connected to the negative side of the direct current are connected in series. A control board (1) for controlling an inverter (91) provided with an integer), and N first connection portions (41) connected to first connection terminals (81) of the first switching element (31). ) And N second connection portions (42) connected to the second connection terminals (82) of the second switching element (32), respectively, and the plate-shaped substrate main body portion (10). N first circuit regions (A1) in which the first drive circuit (21) for driving the first switching element (31) is provided, and the second switching element (32). ), N second circuit regions (A2) provided with second drive circuits (22), N first circuit regions (A1), and N second circuit regions (A2). ) Is provided with an insulating region (B) that electrically insulates between the regions, and the N first connecting portions (41) and the N second connecting portions (42) are arranged in a specified arrangement direction. The first connection portion (41) and the second connection portion (42) are alternately arranged in a line along (D), and each of the first circuit regions (A1) is arranged. A first that is connected to the corresponding first connection portion (41) and is one side of the orthogonal direction (C) orthogonal to the arrangement direction (D) with respect to the first connection portion (41). Arranged on the side (C1), each of the second circuit regions (A2) is connected to the corresponding second connection portion (42) and is connected to the second connection portion (42). It is arranged on the second side (C2) opposite to the first side (C1) in the orthogonal direction (C).

In this configuration, the first circuit region (A1) connected to the first connection portion (41) and the second circuit region (A2) connected to the second connection portion (42) are arranged in the arrangement direction (D). The first side (C1) which is one side of the orthogonal direction (C) orthogonal to the arrangement direction (D) and the other side with respect to the first connecting part (41) and the second connecting part (42) which are lined up. It is arranged separately on the two sides (C2). Therefore, on the second side (C2) with respect to the first connection portion (41) and the second connection portion (42), N second circuit regions (A2) in which the second drive circuit (22) is provided, respectively. ) Can be arranged side by side in the arrangement direction (D). Since the N second switching elements (32) have the same potential on the negative electrode side, the potential difference generated between the two different second drive circuits (22) is the first drive circuit (21) and the first. It is smaller than the potential difference between the two drive circuits (22) and the two different first drive circuits (21). Therefore, it is necessary between the two second circuit regions (A2) adjacent to the arrangement direction (D) on the second side (C2) with respect to the first connection portion (41) and the second connection portion (42). As a result, it is possible to reduce the size of the control board (1) in the arrangement direction (D).

Here, each of the first circuit regions (A1) and the first main body portion (A10) formed so as to extend from the connection portion with the first connection portion (41) to the first side (C1). A first expansion portion (A11) formed so as to extend from the first main body portion (A10) in the arrangement direction (D), and each of the second circuit regions (A2) is the second. A second main body portion (A20) formed so as to extend from the connection portion with the connection portion (42) to the second side (C2), and an extension from the second main body portion (A20) in the arrangement direction (D). The second expansion portion (A21) formed as described above is provided, and the first expansion portion (A11) is separated from the second main body portion (A20) on the first side (C1). The second main body (A20) and the arrangement area (D) are arranged so as to overlap with each other, and the second expansion (A21) is the first with respect to the first main body (A10). The first main body (A10) and the arrangement region (D) are arranged so as to be separated from each other on the two sides (C2), and the insulation region (B) is arranged in the arrangement direction (D). ), One of the first main body portions (A10) of the two first circuit regions (A1) and the other first expansion portion (A11) are electrically insulated from each other. One insulating region (B1), one of the second main body portions (A20) of the two second circuit regions (A2) arranged adjacent to the arrangement direction (D), and the second expansion portion of the other. A second insulating region (B2) that electrically insulates from (A21) is provided, and the width of the second insulating region (B2) in the arrangement direction (D) is the width of the first insulating region (B1). ) Is narrower than the width in the arrangement direction (D).

According to this configuration, since the first circuit region (A1) includes the first expansion portion (A11) in addition to the first main body portion (A10), compared with the case where the first expansion portion (A11) is not provided. Therefore, it becomes easy to make the first main body portion (A10) smaller in the arrangement direction (D). Similarly, since the second circuit region (A2) includes the second expansion portion (A21) in addition to the second main body portion (A20), the second expansion portion (A21) is not provided as compared with the case where the second expansion portion (A21) is not provided. 2 It becomes easy to make the main body (A20) smaller in the arrangement direction (D). Therefore, when the arrangement interval (D) between the first connecting portion (41) and the second connecting portion (42) can be narrowed, the first main body portion (A10) and the second main body are matched accordingly. It becomes easy to make each of the portions (A20) smaller in the arrangement direction (D), and it becomes easier to reduce the size of the control board (1) in the arrangement direction (D). The first expansion portion (A11) is arranged so that the arrangement regions of the second main body portion (A20) and the arrangement direction (D) overlap, and the second expansion portion (A21) is arranged so as to overlap the first main body portion (A10). ) And the arrangement area (D) are arranged so as to overlap with each other. It is possible to provide a portion (A21).

According to the above configuration, the width of the second insulating region (B2) in the arrangement direction (D) is narrower than the width of the first insulating region (B1) in the arrangement direction (D). Therefore, the width of the first insulation region (B1) in the arrangement direction (D) is secured to such an extent that the width between the two first circuit regions (A1) adjacent to the arrangement direction (D) can be appropriately insulated. By narrowing the width of the two insulating regions (B2) in the arrangement direction (D), it is possible to further reduce the size of the control board (1) in the arrangement direction (D).

Further, a control circuit (5) for generating control signals of the first switching element (31) and the second switching element (32) is provided in the region formed in the substrate main body (10). A third circuit region (A3) in which N regions of the first circuit region (A1) and N regions of the second circuit region (A2) are electrically insulated by the insulation region (B). And between the first circuit area (A1) and the third circuit area (A3) while electrically insulating the first circuit area (A1) and the third circuit area (A3). The second circuit region (A2) while electrically insulating the first connecting member (61) that transmits a signal or power from the second circuit region (A2) and the third circuit region (A3). A second connecting member (62) for transmitting a signal or power between the and the third circuit region (A3) is further provided, and the first connecting member (61) is the first connecting portion (41). The second circuit is arranged on the first side (C1) with the first circuit region (A1) in between, and the second connecting member (62) is arranged with respect to the second connecting portion (42). It is preferable that the region (A2) is arranged on the second side (C2) with the region (A2) in between.

When the first connecting member (61) and the second connecting member (62) are arranged in a line along the arrangement direction (D), the first connecting member (61) and the second connecting member (62) Due to the limitation of the arrangement interval in the arrangement direction (D) with, the miniaturization of the control board (1) in the arrangement direction (D) may be hindered. On the other hand, according to the above configuration, the first connecting member (61) and the second connecting member (62) are arranged in the arrangement direction (D) in the first connecting portion (41) and the second connecting portion (41). Since the first side (C1) and the second side (C2) are separately arranged with respect to 42), the first connecting member (61) and the second connecting member (62) are arranged in the arrangement direction (D). It is easier to reduce the size of the control board (1) in the arrangement direction (D) as compared with the case where the control boards (1) are arranged in a line along the line.

As described above, the first connecting member (61) is arranged on the first side (C1) with the first circuit region (A1) interposed therebetween with respect to the first connecting portion (41). In a configuration in which the two connecting members (62) are arranged on the second side (C2) with the second circuit region (A2) interposed therebetween, the first circuit region (42) is arranged with respect to the second connecting portion (42). Each of A1) includes a first main body portion (A10) formed so as to extend from the connection portion with the first connection portion (41) to the first side (C1), and the second circuit region (A2). Each of) includes a second main body portion (A20) formed so as to extend from the connection portion with the second connection portion (42) to the second side (C2), and is arranged in the arrangement direction (D). With respect to the region, at least a part of the first connecting member (61) is arranged so as to overlap with the second main body portion (A20), and with respect to the arrangement region in the arrangement direction (D), the second connecting member ( It is preferable that at least a part of 62) is arranged so as to overlap the first main body portion (A10).

According to this configuration, with respect to the arrangement region in the arrangement direction (D), at least a part of the first connecting member (61) is arranged so as to overlap with the second main body portion (A20), so that the arrangement direction (D) The first main body portion (A10) is smaller in the arrangement direction (D) than the case where the entire first main body portion (61) is arranged so as to overlap the first main body portion (A10). It will be easier to do. Similarly, with respect to the arrangement area in the arrangement direction (D), at least a part of the second connecting member (62) is arranged so as to overlap with the first main body portion (A10), so that the arrangement area in the arrangement direction (D) With respect to the above, it becomes easier to make the second main body portion (A20) smaller in the arrangement direction (D) as compared with the case where the entire second main body portion (62) is arranged so as to overlap the second main body portion (A20). .. Therefore, when the arrangement interval (D) between the first connecting portion (41) and the second connecting portion (42) can be narrowed, the first main body portion (A10) and the second main body are matched accordingly. It becomes easy to make each of the portions (A20) smaller in the arrangement direction (D), and it becomes easier to further reduce the size of the control board (1) in the arrangement direction (D).

As described above, with respect to the arrangement region in the arrangement direction (D), at least a part of the first connecting member (61) is arranged so as to overlap with the second main body portion (A20), and the arrangement direction (D) With respect to the arrangement area of D), the first connecting member (61) is arranged so that at least a part of the second connecting member (62) overlaps with the first main body portion (A10). The first insulating element (61a) that transmits a signal between the first circuit region (A1) and the third circuit region (A3), the first circuit region (A1), and the third circuit region (A3). ), The second connecting member (62) is provided between the second circuit region (A2) and the third circuit region (A3). A second insulating element (62a) for transmitting a signal and a second transformer (62b) for transmitting power between the second circuit region (A2) and the third circuit region (A3) are provided. With respect to the arrangement region in the arrangement direction (D), the first insulating element (61a) is arranged so as to overlap with the first main body portion (A10), and the first transformer (61b) is the same. It is arranged so as to overlap the second main body portion (A20), and the second insulating element (62a) is arranged so as to overlap the second main body portion (A20) with respect to the arrangement region in the arrangement direction (D). It is preferable that the second transformer (62b) is arranged so as to overlap with the first main body portion (A10).

Since the first insulating element (61a) is an element that transmits a signal between the first circuit region (A1) and the third circuit region (A3), the first insulating element (A1) has the first insulation. A signal transmission path connecting the element (61a) and the first connection portion (41) is formed. According to the above configuration, the first insulating element (61a) is arranged so as to overlap the first main body portion (A10) with respect to the arrangement region in the arrangement direction (D), and the first transformer (61b) is the second main body. Since it is arranged so as to overlap the portion (A20), the signal transmission path connecting the first insulating element (61a) and the first connecting portion (41) is close to a straight line along the orthogonal direction (C). It can be a route. Therefore, regarding the arrangement region in the arrangement direction (D), the first transformer (61b) is arranged so as to overlap the first main body portion (A10), and the first insulating element (61a) is arranged with the second main body portion (A20). Compared with the case where they are arranged so as to overlap each other, the first circuit region (A1) can be easily made smaller in the orthogonal direction (C).

Further, since the second insulating element (62a) is an element that transmits a signal between the second circuit region (A2) and the third circuit region (A3), the second circuit region (A2) has a second A signal transmission path connecting the two insulating elements (62a) and the second connecting portion (42) is formed. According to the above configuration, the second insulating element (62a) is arranged so as to overlap the second main body portion (A20) with respect to the arrangement region in the arrangement direction (D), and the second transformer (62b) is the first main body. Since it is arranged so as to overlap the portion (A10), the signal transmission path connecting the second insulating element (62a) and the second connecting portion (42) is close to a straight line along the orthogonal direction (C). It can be a route. Therefore, regarding the arrangement region in the arrangement direction (D), the second transformer (62b) is arranged so as to overlap the second main body portion (A20), and the second insulating element (62a) is arranged with the first main body portion (A10). It becomes easier to make the second circuit region (A2) smaller in the orthogonal direction (C) as compared with the case where they are arranged so as to overlap each other.

As described above, according to the above configuration, the first circuit region (A1) and the second circuit region (A2) can be easily reduced in the orthogonal direction (C), so that the control in the orthogonal direction (C) can be easily performed. The size of the substrate (1) can also be reduced.

In the control board (1) having each of the above configurations, the first switching element (31) includes M (M is an integer of 2 or more) of the first connection terminals (81), and the second switching element (31) is provided. 32) includes L (L is an integer of 2 or more) of the second connection terminals (82), and the first connection portion (41) is the first connection terminal of the first switching element (31). Each of the M third connection terminals (83) connected to (81) is provided, and the second connection portion (42) is connected to the second connection terminal (82) of the second switching element (32), respectively. The L fourth connection terminals (84) to be connected are provided, and the third connection terminal (83) and the fourth connection terminal (84) are arranged so as to be arranged in a line along the arrangement direction (D). It is preferable that it is.

When the third connection terminal (83) and the fourth connection terminal (84) are arranged in a line along the arrangement direction (D) in this way, the control board (1) is large in the arrangement direction (D). It becomes easy to become. In particular, regarding the length of the arrangement area in the arrangement direction (D), the first circuit area (A1) is longer than the first connection portion (41) provided with M third connection terminals (83), and L pieces. When the second circuit area (A2) is longer than the second connection portion (42) provided with the fourth connection terminal (84), the size of the control board (1) in the arrangement direction (D) is large. Prone. However, according to the control board (1) of the present disclosure, as described above, the first connection portion (41) in which the first circuit area (A1) and the second circuit area (A2) are arranged in the arrangement direction (D). The control board (1) can be downsized in the arrangement direction (D) by arranging the control board (1) separately on both sides in the orthogonal direction (C) with respect to the second connection portion (42).

Further, a control circuit (5) for generating control signals of the first switching element (31) and the second switching element (32) is provided in the region formed in the substrate main body (10). The third circuit region (A3) is electrically insulated from each of the N first circuit regions (A1) and the N second circuit regions (A2) by the insulation region (B). A fourth circuit region (A4) in which a drive circuit (23) for driving a second inverter (92) different from the first inverter (91) is provided with the inverter (91) as the first inverter (91). The third circuit region (A3) is formed so as to extend in the arrangement direction (D), and the first side (C1) with respect to the N first circuit regions (A1). ), And the second side (C2) with respect to the N second circuit regions (A2) formed so as to extend in the arrangement direction (D). A second side portion (A32) to be arranged is provided, the control circuit (5) is provided in the first side portion (A31), and the fourth circuit region (A4) is in the arrangement direction (D). ), And is preferably arranged adjacent to the second side (C2) with respect to the second side portion (A32) with the insulating region (B) in between. is there.

According to this configuration, the fourth circuit region (A4) is arranged adjacent to the third circuit region (A3) in the orthogonal direction (C) with the insulation region (B) in between, so that the arrangement direction (A4) ( The fourth circuit region (A4) can be formed on the control board (1) while suppressing the increase in size of the control board (1) in D). Then, according to the above configuration, the fourth circuit region (A4) is the control circuit (5) of the first side portion (A31) and the second side portion (A32) included in the third circuit region (A3). ) Is not provided, and is arranged adjacent to the second side portion (A32). Since the control circuit (5) is not provided on the second side portion (A32), the width of the second side portion (A32) in the orthogonal direction (C) is the width of the first side portion (5) on which the control circuit (5) is provided. It tends to be narrower than the width in the orthogonal direction (C) of A31). Therefore, by arranging the fourth circuit region (A4) so as to be adjacent to the second side (C2) with the insulation region (B) sandwiched between the second side portion (A32), the arrangement direction (A4) A control board (1) in which each component is arranged in a well-balanced manner on both sides (both sides in the orthogonal direction (C)) with reference to the first connection part (41) and the second connection part (42) lined up in D) is realized. be able to.

Further, a fifth circuit region (A5) provided with a voltage detection circuit (6) for detecting a voltage (Vdc) on the DC side of the inverter (91), which is a region formed in the substrate main body (10). It is preferable that the fifth circuit region (A5) is connected to any of the N second circuit regions (A2).

Since the second drive circuit (22) for driving the second switching element (32) connected to the negative electrode side of the direct current is provided in the second circuit region (A2), the circuit in the second circuit region (A2) The reference potential is usually the negative electrode. The voltage (Vdc) on the DC side of the inverter (91) detected by the voltage detection circuit (6) is the potential difference of the positive electrode with respect to the negative electrode. According to the above configuration, since the fifth circuit region (A5) in which the voltage detection circuit (6) is provided is connected to any of the N second circuit regions (A2), the second circuit region (A2) The voltage (Vdc) on the DC side of the inverter (91) can be appropriately detected by the voltage detection circuit (6) with reference to the negative electrode which is the reference potential of the circuit in A2). Further, as described above, on the second side (C2) with respect to the first connection portion (41) and the second connection portion (42), the arrangement direction (D) is higher than that of the first side (C1). It is easy to shorten the length of the insulating region (B) in. Therefore, according to this configuration, the region generated by shortening the length of the insulating region (B) in the arrangement direction (D) in this way can be utilized to make the control board (1) large in the arrangement direction (D). The fifth circuit region (A5) can be provided while suppressing the formation. As a result, the control board (1) as a whole can be easily miniaturized in the arrangement direction (D).

The control board according to the present disclosure may be capable of exerting at least one of the above-mentioned effects.

1: Control board 5: Control circuit 6: Voltage detection circuit 10: Board main body 21: First drive circuit 22: Second drive circuit 23: Third drive circuit (drive circuit for driving the second inverter)
31: 1st switching element 32: 2nd switching element 33: Arm 41: 1st connection part 42: 2nd connection part 61: 1st connection member 61a: 1st insulation element 61b: 1st transformer 62: 2nd connection member 62a: Second insulating element 62b: Second transformer 81: First connection terminal 82: Second connection terminal 83: Third connection terminal 84: Fourth connection terminal 91: First inverter (inverter)
92: 2nd inverter A1: 1st circuit area A2: 2nd circuit area A3: 3rd circuit area A4: 4th circuit area A5: 5th circuit area A10: 1st main body part A11: 1st expansion part A20: 1st 2 Main body part A21: Second expansion part A31: First side part A32: Second side part B: Insulation area B1: First insulation area B2: Second insulation area C: Orthogonal direction C1: First side C2: Second Side D: Arrangement direction Vdc: DC link voltage (voltage on the DC side of the inverter)

Claims (8)

Control to control an inverter equipped with N arms (N is an integer of 2 or more) in which a first switching element connected to the positive electrode side of direct current and a second switching element connected to the negative electrode side of direct current are connected in series. It's a board
It includes N first connection portions connected to the first connection terminal of the first switching element, and N second connection portions connected to the second connection terminal of the second switching element. With
N first circuit regions, which are regions formed in the plate-shaped substrate main body and each of which is provided with a first drive circuit for driving the first switching element, and a second region for driving the second switching element. It includes N second circuit regions in which two drive circuits are provided, and an insulating region that electrically insulates between each of the N first circuit region and the N second circuit region. ,
The N first connection portions and the N second connection portions are arranged so that the first connection portion and the second connection portion are alternately arranged in a line along a specified arrangement direction. Being done
Each of the first circuit regions is connected to the corresponding first connection portion and is arranged on the first side which is one side in the orthogonal direction orthogonal to the arrangement direction with respect to the first connection portion. Being done
Each of the second circuit regions is connected to the corresponding second connection portion and is on the second side opposite to the first side in the orthogonal direction with respect to the second connection portion. The control board that is placed. Each of the first circuit regions is formed so as to extend from the connection portion with the first connection portion to the first side and to extend from the first main body portion in the arrangement direction. With the first expansion part,
Each of the second circuit regions is formed so as to extend from the connection portion with the second connection portion to the second main body portion and to extend from the second main body portion in the arrangement direction. With a second extension,
The first expansion portion is arranged so as to be separated from the second main body portion on the first side and the arrangement region in the arrangement direction overlaps with the second main body portion.
The second expansion portion is arranged so as to be separated from the first main body portion on the second side and the arrangement region in the arrangement direction overlaps with the first main body portion.
The insulation region is a first insulation that electrically insulates between one of the first main body portions and the other first expansion portion of two first circuit regions arranged adjacent to each other in the arrangement direction. A region and a second insulating region that electrically insulates between the second main body portion of one of the two second circuit regions arranged adjacent to each other in the arrangement direction and the second expansion portion of the other. , Equipped with
The control board according to claim 1, wherein the width of the second insulating region in the array direction is narrower than the width of the first insulating region in the array direction. A control circuit for generating control signals of the first switching element and the second switching element is provided in a region formed in the substrate main body, and N first circuit regions and N first switching elements are provided. A third circuit region in which each region of the two circuit regions is electrically insulated by the insulating region,
A first connecting member that transmits a signal or electric power between the first circuit region and the third circuit region while electrically insulating the first circuit region and the third circuit region.
Further, a second connecting member that transmits a signal or electric power between the second circuit region and the third circuit region while electrically insulating the second circuit region and the third circuit region. Prepare,
The first connecting member is arranged on the first side of the first connecting portion with the first circuit region interposed therebetween.
The control board according to claim 1 or 2, wherein the second connecting member is arranged on the second side of the second connecting portion with the second circuit region interposed therebetween. Each of the first circuit regions includes a first main body portion formed so as to extend from the connection portion with the first connection portion to the first side.
Each of the second circuit regions includes a second main body portion formed so as to extend from the connection portion with the second connection portion to the second side.
With respect to the arrangement region in the arrangement direction, at least a part of the first connecting member is arranged so as to overlap with the second main body portion.
The control board according to claim 3, wherein at least a part of the second connecting member is arranged so as to overlap the first main body portion with respect to the arrangement region in the arrangement direction. The first connecting member transmits electric power between a first insulating element that transmits a signal between the first circuit region and the third circuit region, and between the first circuit region and the third circuit region. Equipped with the first transformer
The second connecting member transmits electric power between a second insulating element that transmits a signal between the second circuit region and the third circuit region, and between the second circuit region and the third circuit region. With a second transformer to
With respect to the arrangement region in the arrangement direction, the first insulating element is arranged so as to overlap the first main body portion, and the first transformer is arranged so as to overlap the second main body portion.
With respect to the arrangement region in the arrangement direction, the second insulating element is arranged so as to overlap the second main body portion, and the second transformer is arranged so as to overlap the first main body portion. The control board according to claim 4. The first switching element includes M (M is an integer of 2 or more) of the first connection terminals.
The second switching element includes L (L is an integer of 2 or more) of the second connection terminals.
The first connection portion includes M third connection terminals connected to the first connection terminals of the first switching element, respectively.
The second connection portion includes L fourth connection terminals connected to the second connection terminals of the second switching element, respectively.
The control board according to any one of claims 1 to 5, wherein the third connection terminal and the fourth connection terminal are arranged so as to be arranged in a line along the arrangement direction. A control circuit for generating control signals of the first switching element and the second switching element is provided in a region formed in the substrate main body, and N first circuit regions and N first switching elements are provided. A third circuit region in which each region of the two circuit regions is electrically insulated by the insulation region, and a drive circuit that drives a second inverter different from the first inverter by using the inverter as the first inverter. Further provided with a fourth circuit area provided,
The third circuit region is formed so as to extend in the arrangement direction, and extends in the arrangement direction with a first side portion arranged on the first side with respect to the N first circuit regions. A second side portion formed and arranged on the second side with respect to the N second circuit regions.
The control circuit is provided on the first side portion, and the control circuit is provided on the first side portion.
The fourth circuit region is formed so as to extend in the arrangement direction, and is arranged adjacent to the second side with the insulating region interposed therebetween with respect to the second side portion. The control board according to any one of 1 to 6. A fifth circuit region, which is a region formed in the substrate main body and is provided with a voltage detection circuit for detecting a voltage on the DC side of the inverter, is further provided.
The control board according to any one of claims 1 to 7, wherein the fifth circuit area is connected to any of the N second circuit areas.

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