CN210518135U - Power supply device and electronic equipment - Google Patents
Power supply device and electronic equipment Download PDFInfo
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- CN210518135U CN210518135U CN201921976728.2U CN201921976728U CN210518135U CN 210518135 U CN210518135 U CN 210518135U CN 201921976728 U CN201921976728 U CN 201921976728U CN 210518135 U CN210518135 U CN 210518135U
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Abstract
The embodiment of the utility model discloses power supply unit and electronic equipment. Wherein, this power supply unit includes: the primary winding of the transformer is electrically connected with the power input end of the power supply device; the input end of the first rectifying circuit is electrically connected with a first secondary winding of the transformer; the switching converter comprises a main circuit and a control circuit, wherein the input end of the main circuit is electrically connected with the output end of the first rectifying circuit, the output end of the main circuit is electrically connected with the output end of the power supply device, the output end of the control circuit is electrically connected with the driving end of the main circuit, and the control circuit is used for outputting a driving signal to the main circuit; the input end of the second rectified current is electrically connected with a second secondary winding of the transformer; the output end of the second rectifying circuit is electrically connected with the power supply end of the control circuit. The embodiment of the utility model provides a technical scheme can reduce the use of active controllable device, improves the reliability of circuit.
Description
Technical Field
The utility model relates to the technical field of circuits, especially, relate to a power supply unit and electronic equipment.
Background
With the increasingly wide application of various power electronic devices in the field of aviation, in order to improve the power density of a power supply system, a large number of nonlinear power semiconductor devices are used in the processes of generating and converting electric energy into transmission. The non-linear characteristics of these devices produce many current components at frequencies that are integer multiples of the power supply frequency, i.e., harmonic current components. Harmonic currents bring a series of hazards to both the aircraft power grid and the onboard electrical equipment. For a traditional power conversion product, an additional auxiliary power conversion circuit needs to be added inside to supply power for a product control circuit, and the additional auxiliary power conversion circuit not only increases the volume and weight of the product, but also is not beneficial to the EMC (Electromagnetic Compatibility) characteristics of the product.
SUMMERY OF THE UTILITY MODEL
An embodiment of the utility model provides a power supply unit and electronic equipment has solved and has adopted extra auxiliary power supply converting circuit, for control circuit supplies power, needs to increase active device and extra control, seriously influences the problem of the EMC characteristic of product, through increasing auxiliary winding, acquires auxiliary power supply, supplies power for control circuit, can reduce the use of active controllable device, improve circuit's reliability.
In a first aspect, an embodiment of the present invention provides a power supply apparatus, including:
a transformer, comprising: the power supply device comprises a magnetic core structure, a primary winding, a first secondary winding and a second secondary winding, wherein the primary winding, the first secondary winding and the second secondary winding are wound on the magnetic core structure;
the input end of the first rectifying circuit is electrically connected with the first secondary winding;
the switching converter comprises a main circuit and a control circuit, wherein the input end of the main circuit is electrically connected with the output end of the first rectifying circuit, the output end of the main circuit is electrically connected with the output end of the power supply device, the output end of the control circuit is electrically connected with the driving end of the main circuit, and the control circuit is used for outputting a driving signal to the main circuit;
the input end of the second rectified current is electrically connected with the second secondary winding;
the output end of the second rectifying circuit is electrically connected with the power supply end of the control circuit.
Further, the primary winding is electrically isolated from the second secondary winding.
Further, the first secondary winding is used for outputting six-phase voltage, wherein when the six-phase voltage is sequenced from large to small according to the phase, the phases of two adjacent phases of the voltage in sequence are different by 60 degrees.
Further, the primary winding comprises a first primary winding, a second primary winding and a third primary winding, the magnetic core structure comprises a first magnetic core column, a second magnetic core column and a third magnetic core column, the first end of the first magnetic core column, the first end of the second magnetic core column and the first end of the third magnetic core column are connected, the second end of the first magnetic core column, the second end of the second magnetic core column and the second end of the third magnetic core column are connected, the first primary winding is wound on the first magnetic core column, the second primary winding is wound on the second magnetic core column, and the third primary winding is wound on the third magnetic core column.
The power input end of the power supply device comprises a first power input end, a second power input end and a third power input end,
the first secondary winding comprises a first secondary winding, a second secondary winding, a third secondary winding, a fourth secondary winding, a fifth secondary winding and a sixth secondary winding, the first secondary winding and the second secondary winding are wound on the third magnetic core column, the third secondary winding and the fourth secondary winding are wound on the first magnetic core column, the fifth secondary winding and the sixth secondary winding are wound on the second magnetic core column,
the first end of the first primary side sub-winding, the first end of the third secondary side sub-winding and the second end of the fourth secondary side sub-winding are homonymous ends;
the first end of the second primary side sub-winding, the first end of the fifth secondary side sub-winding and the second end of the sixth secondary side sub-winding are homonymous ends;
the first end of the third primary side sub-winding, the first end of the first secondary side sub-winding and the second end of the second secondary side sub-winding are homonymous ends;
the input ends of the first rectifying circuit comprise a first input end, a second input end, a third input end, a fourth input end, a fifth input end and a sixth input end;
the first end of the first secondary winding, the first end of the second secondary winding, the second end of the first primary winding and the first end of the second primary winding are electrically connected with the first power input end;
the first end of the third secondary side sub-winding, the first end of the fourth secondary side sub-winding, the second end of the second primary side sub-winding and the first end of the third primary side sub-winding are electrically connected with the second power input end;
the first end of the fifth secondary side sub-winding, the first end of the sixth secondary side sub-winding, the second end of the third primary side sub-winding and the first end of the first primary side sub-winding are electrically connected with the third power inlet end;
and second ends of the six secondary side sub-windings of the first secondary side winding are electrically connected with six input ends of the first rectifying circuit in a one-to-one correspondence mode.
Further, the output end of the first rectifier circuit includes a first positive output end and a first negative output end, the first rectifier circuit includes six first bridge arms, the six first bridge arms correspond to the six input ends of the first rectifier circuit one by one, the first end of any first bridge arm is electrically connected with the first positive output end of the first rectifier circuit, the second end of any first bridge arm is electrically connected with the first negative output end of the first rectifier circuit, and any first bridge arm includes: a first diode and a second diode, wherein the first diode and the second diode are connected in series,
in any first bridge arm, the cathode of the first diode is electrically connected with the first end of the first bridge arm, the anode of the first diode and the cathode of the second diode are electrically connected with one input end of the first rectifying circuit corresponding to the first bridge arm, and the anode of the second diode is electrically connected with the second end of the first bridge arm.
Further, the second secondary winding includes a seventh secondary winding, an eighth secondary winding, and a ninth secondary winding, the seventh secondary winding is wound on the first magnetic core column, the eighth secondary winding is wound on the second magnetic core column, and the ninth secondary winding is wound on the third magnetic core column.
Furthermore, the input end of the second rectification circuit comprises a seventh input end, an eighth input end and a ninth input end, the first end of the seventh secondary winding, the first end of the eighth secondary winding and the first end of the ninth secondary winding are electrically connected, the second end of the seventh secondary winding is electrically connected with the seventh input end of the second rectification circuit, the second end of the eighth secondary winding is electrically connected with the eighth input end of the second rectification circuit, and the second end of the ninth secondary winding is electrically connected with the ninth input end of the second rectification circuit.
Furthermore, the output end of the second rectifying circuit comprises a second positive output end and a second negative output end, the second rectifying circuit comprises three second bridge arms,
the three second bridge arms correspond to the three input ends of the second rectifying circuit one by one, the first end of any second bridge arm is electrically connected with the second positive output end of the second rectifying circuit, the second end of any second bridge arm is electrically connected with the second negative output end of the second rectifying circuit, any second bridge arm comprises a third diode and a fourth diode,
in any second bridge arm, the cathode of the third diode is electrically connected with the first end of the second bridge arm, the anode of the third diode and the cathode of the fourth diode are electrically connected with one input end of the second rectifying circuit corresponding to the second bridge arm, and the anode of the fourth diode is electrically connected with the second end of the second bridge arm.
Further, the switching converter is a dc-to-dc switching converter.
In a second aspect, the embodiment of the present invention further provides an electronic device, including: load with the power supply unit that the utility model discloses arbitrary embodiment provided, power supply unit's output is connected with the load electricity.
The utility model discloses power supply unit among the technical scheme of embodiment includes: transformer, first rectifier circuit, switching converter and second rectifier circuit, the transformer includes: the power supply device comprises a magnetic core structure, and a primary winding, a first secondary winding and a second secondary winding which are wound on the magnetic core structure, wherein the primary winding is electrically connected with the power input end of the power supply device; the input end of the first rectifying circuit is electrically connected with the first secondary winding; the switching converter comprises a main circuit and a control circuit, wherein the input end of the main circuit is electrically connected with the output end of the first rectifying circuit, the output end of the main circuit is electrically connected with the output end of the power supply device, the output end of the control circuit is electrically connected with the driving end of the main circuit, and the control circuit is used for outputting a driving signal to the main circuit; the input end of the second rectified current is electrically connected with the second secondary winding; the output end of the second rectifying circuit is electrically connected with the power supply end of the control circuit. Through set up the secondary winding of second in the transformer, and carry out the rectification with the alternating voltage of the secondary winding induction of second through second rectifier circuit, with output direct current voltage supply control circuit, the problem of adopting extra auxiliary power supply transform circuit has been solved, supply power for control circuit, need increase active device and extra control, seriously influence the problem of the EMC characteristic of product, through increasing auxiliary winding, obtain auxiliary power supply, supply power for control circuit, can reduce the use of active controllable device, the reliability of improvement circuit.
Drawings
Fig. 1 is a schematic structural diagram of a power supply device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a transformer according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of another transformer according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of another transformer according to an embodiment of the present invention;
fig. 5 is a schematic diagram of an equivalent circuit structure of a transformer according to an embodiment of the present invention;
fig. 6 is a schematic diagram of a voltage phasor according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a first rectification circuit according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a second rectification circuit according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
An embodiment of the utility model provides a power supply unit. Fig. 1 is a schematic structural diagram of a power supply device according to an embodiment of the present invention. The power supply device 1 includes: transformer 10, first rectifying circuit 20, switching converter 30 and second rectifying circuit 40.
Wherein, transformer 10 includes: the power supply device comprises a magnetic core structure 11, and a primary winding 12, a first secondary winding 13 and a second secondary winding 14 which are wound on the magnetic core structure 11, wherein the primary winding 12 is electrically connected with the power input end of the power supply device 1; the input end of the first rectifying circuit 20 is electrically connected with the first secondary winding 13; the switching converter 30 includes a main circuit 31 and a control circuit 32, an input end of the main circuit 31 is electrically connected to an output end of the first rectification circuit 20, an output end of the main circuit 31 is electrically connected to an output end of the power supply apparatus 1, an output end of the control circuit 32 is electrically connected to a driving end of the main circuit 31, and the control circuit 32 is configured to output a driving signal to the main circuit 31; the input end of the second rectified current 40 is electrically connected to the second secondary winding 14; the output terminal of the second rectifying circuit 40 is electrically connected to the power supply terminal of the control circuit 32.
The transformer 10 may be an ac transformer. The power supply device 1 has its power input end electrically connected to an external sinusoidal ac power supply, which may be mains power. The sinusoidal ac power source may be a single phase or three phase sinusoidal ac power source. The primary winding 12 may be a single phase winding or a three phase winding. Fig. 1 exemplarily shows a case where the primary winding 12 is a single-phase winding, the first secondary winding 13 is a single-phase winding, and the second secondary winding 14 is a single-phase winding. The first rectifying circuit 20 may be an uncontrolled rectifying circuit or a controlled rectifying circuit. The first rectifying circuit 20 rectifies the ac voltage output from the first secondary winding 13 to output a dc voltage to an input terminal of the main circuit 31. The switching converter 30 may perform a voltage step-up and step-down action or an inversion action on the dc voltage input from the input terminal of the main circuit 31, and output a voltage generated by the voltage step-up and step-down action or the inversion action to the output terminal of the main circuit 31. Alternatively, the switching converter 30 may be a dc-to-dc switching converter, such as a buck (buck) non-isolated dc-to-dc switching converter or a boost (boost) non-isolated dc-to-dc switching converter. The control circuit 32 may output a driving signal with a desired duty ratio to cause the switching converter to output a stable voltage. The control circuit 32 may include a control chip, resistors, capacitors, and the like. The second rectifying circuit 40 may be an uncontrolled rectifying circuit or a controlled rectifying circuit. The second rectifying circuit 40 rectifies the ac voltage output by the second secondary winding 14 to output a dc voltage to the control circuit 32, and an auxiliary power supply is not required to be additionally provided to supply power to the control circuit, so that the use of active controllable devices can be reduced, and the reliability of the circuit can be improved. The number of turns of the second secondary winding is set reasonably, so that the direct-current voltage output by the second rectifying circuit 40 meets the voltage level required by the supply control circuit. The larger the number of turns of the second secondary winding, the larger the dc voltage output from the second rectifier circuit 40. The smaller the number of turns of the second secondary winding, the smaller the dc voltage output from the second rectifier circuit 40.
The power supply device in the technical scheme of the embodiment comprises: transformer, first rectifier circuit, switching converter and second rectifier circuit, the transformer includes: the power supply device comprises a magnetic core structure, and a primary winding, a first secondary winding and a second secondary winding which are wound on the magnetic core structure, wherein the primary winding is electrically connected with the power input end of the power supply device; the input end of the first rectifying circuit is electrically connected with the first secondary winding; the switching converter comprises a main circuit and a control circuit, wherein the input end of the main circuit is electrically connected with the output end of the first rectifying circuit, the output end of the main circuit is electrically connected with the output end of the power supply device, the output end of the control circuit is electrically connected with the driving end of the main circuit, and the control circuit is used for outputting a driving signal to the main circuit; the input end of the second rectified current is electrically connected with the second secondary winding; the output end of the second rectifying circuit is electrically connected with the power supply end of the control circuit. Through set up the vice limit winding of second in the transformer, and carry out the rectification with the alternating current voltage of the vice limit winding induction of second through second rectifier circuit, with output direct current voltage supply control circuit, the problem of adopting extra auxiliary power supply transform circuit has been solved, supply power for control circuit, need increase active device and extra control, the problem of the EMC characteristic of serious influence product, keep apart auxiliary winding through increasing, obtain auxiliary power supply, supply power for control circuit, can reduce the use of active controllable device, the reliability of improvement circuit.
Optionally, with continued reference to fig. 1, the primary winding 12 is electrically isolated from the second secondary winding 14. I.e. the primary winding 12 is not connected to the second secondary winding 14.
Fig. 2 is a schematic structural diagram of a transformer according to an embodiment of the present invention. Optionally, the primary winding includes a first primary winding 121, a second primary winding 122, and a third primary winding 123, the magnetic core structure 11 includes a first core leg 111, a second core leg 112, and a third core leg 113, a first end of the first core leg 111, a first end of the second core leg 112, and a first end of the third core leg 113 are connected, a second end of the first core leg 111, a second end of the second core leg 112, and a second end of the third core leg 113 are connected, the first primary winding 121 is wound on the first core leg 111, the second primary winding 122 is wound on the second core leg 112, and the third primary winding 123 is wound on the third core leg 113.
The first primary winding 121, the second primary winding 122 and the third primary winding 123 have the same number of turns. Fig. 2 exemplarily shows a case where the primary winding 12 is a three-phase winding. Alternatively, as shown in fig. 2, the three-phase windings of the primary winding 12 are connected in a star configuration. Alternatively, as shown in fig. 2, the first secondary winding 12 may be a three-phase winding, and the three-phase winding may be star-connected or delta-connected.
Optionally, fig. 3 is a schematic structural diagram of another transformer according to an embodiment of the present invention, and on the basis of the above embodiment, the first secondary winding 13 is used for outputting six-phase voltages, where when the six-phase voltages are sorted from large to small in phase, phases of two-phase voltages adjacent to each other in sequence are different by 60 degrees. Fig. 3 exemplarily shows a case where the first secondary winding includes six secondary sub-windings, three of which are star-connected and the remaining three of which are delta-connected, and exemplarily, the phases of voltages output from six terminals of the second secondary winding may be 0 degrees, 60 degrees, 120 degrees, 180 degrees, 240 degrees, and 300 degrees, wherein the voltages output from three terminals of the three secondary sub-windings connected in the star-type may be 0 degrees, 120 degrees, and 240 degrees, and the voltages output from three terminals of the three secondary sub-windings connected in the delta-type may be 60 degrees, 180 degrees, and 300 degrees. The first secondary winding 13 is rectified by the first rectifier circuit 20 to generate a 12-pulse rectified voltage.
Optionally, the voltage output by the first secondary winding 13 may be one of 3-phase voltage, 9-phase voltage, 12-phase voltage, 15-phase voltage, 24-phase voltage, and the like, and is rectified by the first rectification circuit 20 to generate one of 6-pulse rectified voltage, 18-pulse rectified voltage, 24-pulse rectified voltage, 30-pulse rectified voltage, 36-pulse rectified voltage, and 48-pulse rectified voltage. The larger the number of phase voltages output from the first secondary winding 13 is, the smaller the fluctuation of the voltage output from the first rectifier circuit is, but the larger the number of secondary windings of the first secondary winding 13 is, the more complicated the structure of the first secondary winding is, the more complicated the structure of the first rectifier circuit to be matched is, the larger the equipment volume is, and the higher the cost is. When the voltage output by the first secondary winding 13 may be 6-phase voltage, the fluctuation of the voltage output by the first rectifying circuit is small, and the device size is small.
Optionally, fig. 4 is a schematic structural diagram of another transformer provided by an embodiment of the present invention, based on the above embodiment, the power input end of the power supply device 1 includes a first power input end Va, a second power input end Vb and a third power input end Vc, and the second end N12 of the first primary winding 121 and the first end N21 of the second primary winding 122 are electrically connected to the first power input end Va; the second end N22 of the second primary sub-winding 122 and the first end N31 of the third primary sub-winding 123 are electrically connected with the second power input end Vb; the second end N32 of the third primary winding 123 and the first end N11 of the first primary winding 121 are electrically connected to the third power input terminal Vc, i.e., the three-phase windings of the primary windings are connected in a delta shape.
Optionally, fig. 5 is an equivalent circuit schematic diagram of a transformer that the embodiment of the present invention provides, fig. 6 is a voltage phasor schematic diagram that the embodiment of the present invention provides, fig. 7 is a structural schematic diagram of a first rectification circuit that the embodiment of the present invention provides, on the basis of the above-mentioned embodiment, as shown in fig. 4 to fig. 7, the first secondary winding includes the first secondary winding 131, the second secondary winding 132, the third secondary winding 133, the fourth secondary winding 134, the fifth secondary winding 135 and the sixth secondary winding 136, the first secondary winding 131 and the second secondary winding 132 are wound on the third magnetic core column 113, the third secondary winding 133 and the fourth secondary winding 134 are wound on the first magnetic core column 111, and the fifth secondary winding 135 and the sixth secondary winding 136 are wound on the second magnetic core column 112.
The first end N11 of the first primary sub-winding 121, the first end N61 of the third secondary sub-winding 133, and the second end N72 of the fourth secondary sub-winding 134 are homonymous terminals; the first end N21 of the second primary sub-winding 122, the first end N81 of the fifth secondary sub-winding 135 and the second end N92 of the sixth secondary sub-winding 136 are homonymous terminals; the first end N31 of the third primary side sub-winding 123, the first end N41 of the first secondary side sub-winding 131, and the second end N52 of the second secondary side sub-winding 132 are homonymous ends.
The input terminals of the first rectifying circuit 20 include a first input terminal, a second input terminal, a third input terminal, a fourth input terminal, a fifth input terminal, and a sixth input terminal; the first end N41 of the first secondary winding 131, the first end N51 of the second secondary winding 132, the second end N12 of the first primary winding 121, and the first end N21 of the second primary winding 122 are all electrically connected to the first power input end Va; the first end N61 of the third secondary winding 133, the first end N71 of the fourth secondary winding 134, the second end N22 of the second primary winding 122, and the first end N31 of the third primary winding 123 are all electrically connected with the second power input end Vb; the first end N81 of the fifth secondary winding 135, the first end N91 of the sixth secondary winding 136, the second end N32 of the third primary winding 123, and the first end N11 of the first primary winding 121 are all electrically connected to the third power input terminal Vc; second ends of the six secondary sub-windings of the first secondary winding are electrically connected to six input ends of the first rectifying circuit 20 in a one-to-one correspondence.
The number of turns of the first secondary sub-winding 131, the second secondary sub-winding 132, the third secondary sub-winding 133, the fourth secondary sub-winding 134, the fifth secondary sub-winding 135 and the sixth secondary sub-winding 136 is equal. As shown in fig. 6, the voltages of the second ends of the first, second, third, fourth, fifth and sixth secondary sub-windings 131, 132, 133, 134, 135 and 136 are Uaf, Ual, Ubf, Ubl, Ucf and Ucl, respectively. Three-phase symmetrical voltage is input to a first power input end Va, a second power input end Vb and a third power input end Vc through a three-phase symmetrical alternating current power supply, and the corresponding voltage phasors are OA, OB and OC respectively. Through reasonably setting the number of turns of the six secondary side sub-windings of the first secondary side winding, the phases of voltage phasors of Uaf, Ual, Ubf, Ubl, Ucf and Ucl are sequentially different by 60 degrees, and the amplitudes are equal. It should be noted that, as shown in fig. 5 and fig. 7, the electrical nodes with the same labels, such as n1, n2, n3, n4, n5 and n6, for example, the terminals labeled with n3 are electrically connected, the electrical nodes labeled with n5 are electrically connected, the second ends of the six secondary side sub-windings of the first secondary side winding are respectively electrically connected with 6 electrical nodes n1, n2, n3, n4, n5 and n6 in a one-to-one correspondence, and the 6 electrical nodes n1, n2, n3, n4, n5 and n6 are electrically connected with six input ends of the first rectification circuit 20 in a one-to-one correspondence.
Optionally, on the basis of the foregoing embodiment, with continued reference to fig. 7, the output end of the first rectifier circuit 20 includes a first positive output end V1+ and a first negative output end V1 —, the first rectifier circuit 20 includes six first bridge arms 21, the six first bridge arms 21 correspond to six input ends of the first rectifier circuit 20 one to one, a first end of any one of the first bridge arms 21 is electrically connected to the first positive output end of the first rectifier circuit 20, a second end of any one of the first bridge arms 21 is electrically connected to the first negative output end of the first rectifier circuit 20, and any one of the first bridge arms 21 includes: in any one first bridge arm 21, the cathode of a first diode D1 is electrically connected with the first end of the first bridge arm 21, the anode of the first diode D1 and the cathode of a second diode D2 are electrically connected with one input end of a first rectifying circuit 20 corresponding to the first bridge arm 21, and the anode of a second diode D2 is electrically connected with the second end of the first bridge arm 21, namely the first rectifying circuit comprises two groups of three-phase bridge type uncontrolled rectifying circuits, the output ends of the two groups of three-phase bridge type uncontrolled rectifying circuits are connected in parallel, the two groups of three-phase bridge type uncontrolled rectifying circuits do not need to be provided with a control circuit to control the connection and disconnection of the diodes, and the three-phase bridge type uncontrolled rectifying circuit is simple in structure and low in cost.
It should be noted that the first secondary winding 12 in fig. 3 can be combined with the first rectifying circuit 20 in fig. 7 to output 12 pulses of rectified voltage.
Optionally, on the basis of the above embodiment, with continued reference to fig. 2, the second secondary winding 14 includes a seventh secondary sub-winding 141, an eighth secondary sub-winding 142, and a ninth secondary sub-winding 143, the seventh secondary sub-winding 141 is wound on the first magnetic core leg 111, the eighth secondary sub-winding 142 is wound on the second magnetic core leg 112, and the ninth secondary sub-winding 143 is wound on the third magnetic core leg 113. The second secondary winding 14 may be a three-phase winding. Optionally, the three-phase windings of the second secondary winding are connected in a delta shape. The seventh, eighth, and ninth secondary sub-windings 141, 142, and 143 have the same number of turns. As shown in fig. 6, three-phase symmetric voltage phasors output by the three-phase winding of the second secondary winding can be Uaa, Ubb and Ucc respectively, the phases are sequentially different by 120 degrees, and the amplitudes are equal.
Alternatively, fig. 8 is a schematic structural diagram of a second rectifier circuit according to an embodiment of the present invention, based on the above embodiment, the input end of the second rectifier circuit 40 includes a seventh input end, an eighth input end, and a ninth input end, the first end of the seventh secondary winding 141, the first end of the eighth secondary winding 142, and the first end of the ninth secondary winding 143 are electrically connected, the second end of the seventh secondary winding 141 is electrically connected to the seventh input end of the second rectifier circuit 40, the second end of the eighth secondary winding 142 is electrically connected to the eighth input end of the second rectifier circuit 40, the second end of the ninth secondary winding 142 is electrically connected to the ninth input end of the second rectifier circuit 40, that is, the three-phase winding of the second secondary winding is star-connected, a floating midpoint n0 can be obtained, and the voltages of the second ends of the three secondary windings of the second secondary winding can be detected, and judging whether the three-phase voltage input by the primary winding is under-voltage and/or open-phase or not so as to realize under-voltage and/or open-phase protection. If the voltage of the second end of the secondary winding of the second secondary winding is lower than the preset voltage, the occurrence of undervoltage is determined, and then an alarm is given or the electrical connection between the power supply device 1 and an external power supply is disconnected. If the voltage of the second end of at least one secondary side sub-winding of the second secondary side winding is detected to be close to zero, the occurrence of phase failure is determined, and then an alarm is given or the electrical connection between the power supply device 1 and an external power supply is disconnected.
Optionally, on the basis of the above embodiment, with continuing reference to fig. 8, the output terminal of the second rectification circuit 40 includes a second positive output terminal V2+ and a second negative output terminal V2-, and the second rectification circuit 40 includes three second legs 41.
Wherein, three second bridge arms 41 correspond to three input ends of the second rectification circuit 40 one by one, a first end of any second bridge arm 41 is electrically connected with a second positive output end V2+ of the second rectification circuit 40, a second end of any second bridge arm 41 is electrically connected with a second negative output end V2-of the second rectification circuit 40, any second bridge arm 41 comprises a third diode D3 and a fourth diode D4, in any second bridge arm 41, a cathode of the third diode D3 is electrically connected with the first end of the second bridge arm 41, an anode of the third diode D3 and a cathode of the fourth diode D4 are electrically connected with one input end of the second rectification circuit 40 corresponding to the second bridge arm 41, an anode of the fourth diode D4 is electrically connected with the second end of the second bridge arm 41, that is, the second rectification circuit 40 comprises a three-phase bridge type uncontrolled rectification circuit, and a control circuit is not needed to control the on and off of the diodes, simple structure and low cost.
An embodiment of the utility model provides an electronic equipment. Fig. 9 is a schematic structural diagram of an electronic device according to an embodiment of the present invention. The electronic device 100 includes: load 2 and the power supply unit 1 that the utility model discloses arbitrary embodiment provided, power supply unit 1's output is connected with load 2 electricity.
Wherein the electronic device may be an airplane or the like. The load may be various electrical devices on the aircraft, such as motors, lights, etc. The embodiment of the utility model provides an electronic equipment includes the power supply unit in above-mentioned embodiment, consequently the utility model provides a power supply unit also possesses the beneficial effect that the above-mentioned embodiment described, and this is no longer repeated here.
With the increasingly wide application of various power electronic devices in the field of aviation, in order to improve the power density of a power supply system, a large number of nonlinear power semiconductor devices are used in the processes of generating and converting electric energy into transmission. The non-linear nature of these devices produces many current components at frequencies that are integer multiples of the power supply frequency, i.e., harmonic current components. Harmonic currents bring a series of hazards to both the aircraft power grid and the onboard electrical equipment. For three-phase alternating current aviation electric equipment, a multi-pulse transformer rectifier is adopted based on the requirements of low input current total harmonic and single harmonic.
It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious modifications, rearrangements, combinations and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.
Claims (10)
1. A power supply device, comprising:
a transformer, comprising: the power supply device comprises a magnetic core structure, a primary winding, a first secondary winding and a second secondary winding, wherein the primary winding, the first secondary winding and the second secondary winding are wound on the magnetic core structure;
the input end of the first rectifying circuit is electrically connected with the first secondary winding;
the switching converter comprises a main circuit and a control circuit, wherein the input end of the main circuit is electrically connected with the output end of the first rectifying circuit, the output end of the main circuit is electrically connected with the output end of the power supply device, the output end of the control circuit is electrically connected with the driving end of the main circuit, and the control circuit is used for outputting a driving signal to the main circuit;
the input end of the second rectifying circuit is electrically connected with the second secondary winding;
and the output end of the second rectifying circuit is electrically connected with the power supply end of the control circuit.
2. The power supply device of claim 1, wherein the primary winding is electrically isolated from the second secondary winding.
3. The power supply device according to claim 1, wherein the first secondary winding is configured to output six-phase voltages, and wherein phases of two voltages adjacent in sequence are different by 60 degrees when the six-phase voltages are sorted from large to small.
4. The power supply device according to claim 1, wherein the primary winding comprises a first primary winding, a second primary winding, and a third primary winding, the core structure comprises a first core leg, a second core leg, and a third core leg, a first end of the first core leg, a first end of the second core leg, and a first end of the third core leg are connected, a second end of the first core leg, a second end of the second core leg, and a second end of the third core leg are connected, the first primary winding is wound on the first core leg, the second primary winding is wound on the second core leg, and the third primary winding is wound on the third core leg;
the power input end of the power supply device comprises a first power input end, a second power input end and a third power input end,
the first secondary winding comprises a first secondary winding, a second secondary winding, a third secondary winding, a fourth secondary winding, a fifth secondary winding and a sixth secondary winding, the first secondary winding and the second secondary winding are wound on the third magnetic core column, the third secondary winding and the fourth secondary winding are wound on the first magnetic core column, the fifth secondary winding and the sixth secondary winding are wound on the second magnetic core column,
the first end of the first primary side sub-winding, the first end of the third secondary side sub-winding and the second end of the fourth secondary side sub-winding are homonymous ends;
the first end of the second primary side sub-winding, the first end of the fifth secondary side sub-winding and the second end of the sixth secondary side sub-winding are homonymous ends;
the first end of the third primary side sub-winding, the first end of the first secondary side sub-winding and the second end of the second secondary side sub-winding are homonymous ends;
the input ends of the first rectifying circuit comprise a first input end, a second input end, a third input end, a fourth input end, a fifth input end and a sixth input end;
the first end of the first secondary winding, the first end of the second secondary winding, the second end of the first primary winding and the first end of the second primary winding are all electrically connected with the first power input end;
the first end of the third secondary side sub-winding, the first end of the fourth secondary side sub-winding, the second end of the second primary side sub-winding and the first end of the third primary side sub-winding are all electrically connected with the second power input end;
the first end of the fifth secondary side sub-winding, the first end of the sixth secondary side sub-winding, the second end of the third primary side sub-winding and the first end of the first primary side sub-winding are all electrically connected with the third power inlet end;
and the second ends of the six secondary side sub-windings of the first secondary side winding are electrically connected with the six input ends of the first rectifying circuit in a one-to-one correspondence manner.
5. The power supply device according to claim 4, wherein the output terminal of the first rectifier circuit includes a first positive output terminal and a first negative output terminal, the first rectifier circuit includes six first bridge arms, the six first bridge arms correspond to the six input terminals of the first rectifier circuit in a one-to-one manner, a first terminal of any one of the first bridge arms is electrically connected to the first positive output terminal of the first rectifier circuit, a second terminal of any one of the first bridge arms is electrically connected to the first negative output terminal of the first rectifier circuit, and any one of the first bridge arms includes: a first diode and a second diode, wherein the first diode and the second diode are connected in series,
in any one of the first bridge arms, a cathode of the first diode is electrically connected with a first end of the first bridge arm, an anode of the first diode and a cathode of the second diode are electrically connected with one input end of the first rectifying circuit corresponding to the first bridge arm, and an anode of the second diode is electrically connected with a second end of the first bridge arm.
6. The power supply device according to claim 4, wherein the second secondary winding comprises a seventh secondary winding, an eighth secondary winding and a ninth secondary winding, the seventh secondary winding is wound on the first core leg, the eighth secondary winding is wound on the second core leg, and the ninth secondary winding is wound on the third core leg.
7. The power supply device according to claim 6, wherein the input terminals of the second rectifier circuit include a seventh input terminal, an eighth input terminal, and a ninth input terminal, the first terminal of the seventh secondary winding, the first terminal of the eighth secondary winding, and the first terminal of the ninth secondary winding are electrically connected, the second terminal of the seventh secondary winding is electrically connected to the seventh input terminal of the second rectifier circuit, the second terminal of the eighth secondary winding is electrically connected to the eighth input terminal of the second rectifier circuit, and the second terminal of the ninth secondary winding is electrically connected to the ninth input terminal of the second rectifier circuit.
8. The power supply device according to claim 7, wherein the output terminal of the second rectifying circuit includes a second positive output terminal and a second negative output terminal, the second rectifying circuit includes three second legs,
the three second bridge arms correspond to the three input ends of the second rectifying circuit one by one, the first end of any one second bridge arm is electrically connected with the second positive output end of the second rectifying circuit, the second end of any one second bridge arm is electrically connected with the second negative output end of the second rectifying circuit, any one second bridge arm comprises a third diode and a fourth diode,
in any one of the second bridge arms, the cathode of the third diode is electrically connected with the first end of the second bridge arm, the anode of the third diode and the cathode of the fourth diode are electrically connected with one input end of the second rectifying circuit corresponding to the second bridge arm, and the anode of the fourth diode is electrically connected with the second end of the second bridge arm.
9. The power supply apparatus according to claim 1, wherein the switching converter is a dc-to-dc switching converter.
10. An electronic device, comprising: a load and a power supply apparatus as claimed in any one of claims 1 to 9, the output of the power supply apparatus being electrically connected to the load.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921976728.2U CN210518135U (en) | 2019-11-15 | 2019-11-15 | Power supply device and electronic equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921976728.2U CN210518135U (en) | 2019-11-15 | 2019-11-15 | Power supply device and electronic equipment |
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| CN210518135U true CN210518135U (en) | 2020-05-12 |
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| CN201921976728.2U Active CN210518135U (en) | 2019-11-15 | 2019-11-15 | Power supply device and electronic equipment |
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