WO1996013093A1

WO1996013093A1 - Inverter device

Info

Publication number: WO1996013093A1
Application number: PCT/JP1995/000240
Authority: WO
Inventors: Norinaga Suzuki; Hidenori Sugino; Akiko Ishii; Tsunehiro Endo; Toshihiko Wada
Original assignee: Hitachi, Ltd.
Priority date: 1994-10-24
Filing date: 1995-02-20
Publication date: 1996-05-02

Abstract

An inverter device the height of which is sufficiently reduced and, therefore, the size of which can be easily reduced even when large-sized electrolytic capacitors for a main circuit are used. This inverter device has holder sections (12) holding electrolytic capacitors (6) for a main circuit which are fitted to both sides of a spacer member (5). The capacitors (6) are connected to the DC terminals of a power supply terminal block (2A) through wires (15). Since the electrolytic capacitors (6) are not housed in the inverter's main body, the height of the main body can be reduced by the height of the capacitors (6).

Description

Inverter equipment Technical field

The present invention relates to an invar evening device which is formed into a unit and is useful as a wall-mounted type, and particularly to a general-purpose invar evening device suitable for driving an induction motor. Background art

The inverter unit g has been widely used in recent years because it can easily and efficiently operate a general-purpose induction motor at a variable speed.The general circuit configuration of the inverter unit is as follows. It is as shown in Fig. 8.

That is, FIG. 8 is a diagram showing a main circuit portion necessary for the basic operation of a general voltage source inverter device. In FIG. 8, A is a forward converter, B is an inverse converter, and C is an inverter. Is the main circuit capacitor and IM is the induction motor.

This inverter device receives AC power from, for example, a 50 Hz or 60 Hz commercial AC power source, obtains DC power from the forward converter A, and smoothes the DC power using the capacitor C. The smoothed DC power is re-converted into AC power by the inverse converter B, whereby, for example, a low frequency of 0.5 Hz to a high frequency of 100 Hz AC power of any frequency up to is supplied to the induction motor IM, which is a load, and the induction motor IM is operated at a variable speed.

Therefore, a sufficiently smoothed DC voltage must be supplied to the input of the inverting section B. For this reason, it is necessary to provide a capacitor having a considerably large capacitance in the DC main circuit. As a result, the main circuit As the capacitor C, an electrolytic capacitor is usually used.

By the way, in a conventional inverter device, as is known, for example, from JP-A-600-219996, the main circuit electrolytic capacitor for smoothing is provided with a mounting member provided in advance in itself. Or use a suitable frame or the like to secure it in the inverter device with screws, etc., and connect the electrolytic capacitor terminals directly to the wiring board pattern by soldering. After attaching or soldering the conductor bars and wires, they are connected to a predetermined circuit via these conductor bars and wires.

The prior art described above does not take into account that the main circuit capacitor of the inverter requires a considerable capacitance: ft, and therefore does not take into account that it is a component having a large volume. In other words, in recent years, inverters have become widely used, in which the entire device is packaged in a case made of plastic or the like from the viewpoint of downsizing and ease of handling and installation. However, at this time, the main circuit capacitor requires a large capacitance, so even if an electrolytic capacitor is used, it becomes large, and therefore occupies a considerable volume in the case. As a result, it is difficult to reduce the size, and in particular, it is difficult to reduce the dimension in the height direction from the mounting surface, resulting in an increase in the size.

SUMMARY OF THE INVENTION An object of the present invention is to provide an inverter device which is capable of sufficiently reducing the dimension in the height direction even when a large capacitor for a main circuit is used, and which can easily be miniaturized. is there. Disclosure of the invention

An object of the present invention is to provide an inverter apparatus having at least a forward conversion unit and an inverse conversion unit and a smoothing capacitor, and Into a cubic (box-shaped) inverter body with the terminal block, and externally connect the above-mentioned capacitor. The connection between this external capacitor and the inverter main circuit is This is achieved by using a terminal block.

In a unitized inverter device, the main circuit capacitor is housed in a stacked state in the height direction, so the external main circuit capacitor is removed from the inside of the main unit. It works to reduce the height dimension of the inverter body.

As a result, even if a large capacitor for the main circuit is used, the dimension of the inverter body in the height direction can be sufficiently suppressed, and thus the size can be reduced. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a perspective view showing one embodiment of an inverter device according to the present invention.

FIG. 2 is an exploded perspective view showing an embodiment of the inverter device according to the present invention.

FIG. 3 is an explanatory diagram of a main circuit electrolytic capacitor holder section in one embodiment of the present invention.

FIG. 4 is an explanatory view of a stopper member in one embodiment of the present invention. FIG. 5 is a perspective view of a main circuit electrolytic capacitor holder portion and a stopper member in one embodiment of the present invention. It is.

FIG. 6 is a perspective view showing another embodiment of the inverter device according to the present invention.

FIG. 7 is a perspective view showing still another embodiment of the inverter device according to the present invention.

FIG. 8 is a circuit diagram showing an example of a main circuit of the inverter device. FIG. 9 shows details of the inverter main body in one embodiment of the present invention. FIG. 3 is an explanatory diagram including an example of dimensions.

FIG. 10 is an explanatory diagram showing details of an inverter main body in one embodiment of the present invention, including a cross-sectional view.

FIG. 11 is an explanatory diagram showing details of the inverter main body according to an embodiment of the present invention except for a power module.

FIG. 12 is an explanatory diagram including a cross-sectional view excluding a power module from an inverter main body in one embodiment of the present invention and including a cross-sectional view.

FIG. 13 is an explanatory diagram showing in detail an inverter main body and a power module according to one embodiment of the present invention.

FIG. 14 is an explanatory diagram showing the inverter main body and the power module in one embodiment of the present invention in detail including a sectional view and a perspective view.

FIG. 15 is an explanatory diagram showing details of a capacitor holder portion in one embodiment of the present invention.

FIG. 16 is an explanatory diagram showing details of a capacitor holder portion in one embodiment of the present invention, including a cross-sectional view and a perspective view.

FIG. 17 is an explanatory diagram showing details of a spacer portion in one embodiment of the present invention including an example of dimensions.

FIG. 18 is an explanatory view showing another embodiment of the present invention.

FIG. 19 is an explanatory view showing another embodiment of the present invention.

FIG. 20 is an explanatory view showing still another embodiment of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, an invertor according to the present invention will be described in detail with reference to the illustrated embodiments.

FIGS. 1 and 2 show an embodiment of the present invention. In these figures, 1 is a cooling fin, 2 is a power module, 3 is a power supply board, 4 is a flexible flat cable, and 5 is a spacer. Parts, 5 A for mounting Materials, 6 is main circuit electrolytic capacitor, 6 A is capacitor electrode terminal, 7 is control board, 8 is control board holder cover, 9 is digital operation panel, 10 is front cover, and 12 is main circuit electrolytic capacitor Holder, 13 is a bottom entry socket, 14 is a screw for mounting a power module, 15 is a wire for connecting a capacitor, 15 A is a fast terminal (elastic insertion type terminal), 15 B is a crimp terminal (screw-type terminal), and 16 is the pin header of the power module.

The cooling fin 1 is made of a die cast of a light alloy, such as an aluminum alloy, and has a role as a cooling fin and also serves as a base for the entire inverter device. I have.

The power module 2 is equipped with the inverter forward converter A and the inverter converter B described in Fig. 8, and has a main circuit terminal block 2A on the power supply side and a main circuit terminal block 2B on the load side. It is made of synthetic resin into a flat shape of the same dimensions as the die-cast case 1 and is mounted on the die-cast case 1 using four screws 14. In FIG. 2, one of these terminal block screws is indicated by 39.

Therefore, according to this embodiment, the heat generated from the forward conversion unit A and the reverse conversion unit B mounted on the power module 2 is directly transmitted to the die cast case 1, and the efficient cooling function is achieved. Can be obtained.

The power supply board 3 has mounted thereon a drive circuit for driving the inverse conversion section and a power supply circuit required for the circuits of each section. Then, between the circuit mounted on the power supply board 3 and the circuit mounted on the power module 2, the power supply board 3 is placed horizontally on the power module 2 and accommodated therein. When mounted, the bottom entry socket 13 provided on the power supply board 3 is fitted to the pin header section 16 provided on the power module 2 for electrical connection. And the required interface is automatically provided. I have.

As apparent from FIG. 2 in particular, the spacer member 5 has the same dimensions in the width direction as the power module 2 and the length in the longitudinal direction is shorter than that of the power module 2. It is made as a shallow box-shaped frame by resin, and it works to create a space for accommodating the power supply board 3 and the control board 7. At both outer sides in the width direction, mounting members 5A for holding the capacitor holder 12 are formed.

Next, four pawls are provided on the lower side of the lateral side plate of the spacer member 5 as shown in the drawing, while the power module 2 is formed with a recess correspondingly. is there.

Therefore, according to this embodiment, attachment of the spacer member 5 to the first module 2 can be performed simply by stacking and pressing the spacer member 5 on the power module 2.

The power supply board 3 is accommodated under the spacer member 5 and the control board 7 is accommodated at the upper side. At this time, the flexible flat cable 4 The horizontal sockets 21 are mounted on each of these boards, and the flexible flat cable 4 is attached to these sockets, so that these boards are connected to each other. The necessary interface between the substrates is provided.

On the control board 7, elements necessary for controlling an inverter such as a microcomputer are mounted, and further, a connector 32 serving as a connection section for a control signal interface is mounted. Therefore, even when the user or the like interfaces with an external device, it can be easily connected.

In this embodiment, the connection portion is divided and divided into two interface connector portions 32. Therefore, it is considered that one of the connector portions is frequently used. Control signal path Other control signal paths can be arranged on the other side.

The control board 7 is attached by a positioning projection provided inside the spacer member 5 and fixed by attaching the control board holder cover 8 from above. However, the control board holder cover 8 is configured to be attached to the spacer member 5 by fitting the claws.

Therefore, according to this embodiment, the only screws required for assembling the inverter body are four power module mounting screws 14, and thereafter, the spacer member 5 and the control board holder cover 8 are mounted. Can be assembled only by sequentially stacking and fitting the claws, so that the number of processes is reduced and assembly is facilitated.

As described above, the control board holder cover 8 can be mounted on the control board 7, but the digital operation panel 9 can be mounted and used on this, and the front cover 10 can be mounted on this. It can be installed and used, or can be arbitrarily selected.

Therefore, according to this embodiment, the functions selectable by the user can be increased.

At this time, the screws 40 are used to attach and detach the digital operation panel 9 to and from the control board holder cover 8, and the attachment and detachment of the front cover 10 is performed by fitting using claws as shown in the figure. And so on.

Holders (main circuit electrolytic capacitor holders) 12 are mounted on both sides of the spacer member 5 by mounting members 5A, and serve to accommodate and hold an external capacitor 6. The capacitor 6 housed here is connected to the DC terminal of the power supply side terminal block 2 A by the electric wire 15.

Here, the detailed configuration of the holder 12 will be described with reference to FIGS. 3 to 5. First, as shown in FIG. The main part is a main body 12 A made in a substantially cylindrical shape having a bottom. A mounting member 12B is provided on a side surface of the main body 12A, a plurality of slot portions 12C are provided on both side surfaces of the cylindrical surface, and around a bottom portion thereof. Notch 1 2 D is provided

A substantially disk-shaped stopper member (holding member) 12E as shown in FIG. 4 is provided in the main body 12A of the holder 12 as shown in FIG. As shown in the figure, the stopper member 12 E has a notch 12 F for providing elasticity, and a projection 12 protruding from the outer periphery thereof. G is formed. By pressing the projection 12G of the stopper member 12E from the outside into the main body 12A of the holder portion 12, the stopper member 12 E can be inserted into the main body 12 A of the holder 12, and then the projection 12 G that is about to spread outward is fitted into any one of the slot 12 C. It can be held in that position.

Therefore, as shown in FIG. 2, first, the holder 12 is fitted with the mounting member 12B of the spacer member 5 to the mounting member 5A of the spacer member 5. Attach on both sides of member 5 and insert capacitor 6 inside. After that, insert the stopper member 12 E into the main body 12 A 內 of the holder 12, and insert the projection 12 G into the slot 12 C at the fully pushed position. If they are fitted to each other, the holder 6 can securely hold the capacitor 6 outside the spacer member 5.

The main circuit electrolytic capacitor 6 is connected to the inverter DC main circuit by connecting the electrode terminals 6 A of the main circuit electrolytic capacitor 6 inserted in the main body 12 A of the holder 12 with two electric wires 15. The connection is completed by connecting two terminals, a DC + terminal provided on the terminal block 2A of the module 2 and a DC terminal. The electric wire 15 is provided with a fast terminal 15 A on one side and a crimp terminal 15 B on the other side, so that the crimp terminal 15 B is connected to the power terminal block of the power module 2. A predetermined connection state can be obtained by attaching the first terminal 15 A to the electrode terminal 6 A of the main circuit electrolytic capacitor 6 after attaching to the 2 A DC terminal.

At this time, as shown in Fig. 1, the wire 15 is taken out of the holder 12 by removing the notch 12D provided around the bottom of the main body 12A. An opening for taking out the electric wire is taken out from here. In order to facilitate this work, the bottom of the main body 12A may be made detachable.

Therefore, according to this embodiment, since the main circuit electrolytic capacitor 6 is taken out of the main body of the inverter and is attached to the side surface, the height of the main body, that is, in FIG. The dimension from the lower surface of the cooling fin 1 to the upper surface of the front cover 10 can be reduced.

In addition, according to this embodiment, the mounting work of the main circuit electrolytic capacitor 6 is easy, and it can be easily mounted even after the spacer member 5 is assembled, and even when the main circuit electrolytic capacitor 6 is replaced. It is not necessary to disassemble the main unit, simply remove the capacitor box cover 7, remove the first terminal 15A of the electric wire 15, remove the main circuit electrolytic capacitor 6, and replace it with a new one. Good, maintenance of life parts can be easily obtained.

Furthermore, in this embodiment, the main body 12A of the holder 12 has a plurality of slot portions 12C formed at a plurality of positions, for example, three positions as shown in the drawing. Any one of 2A is selected, and the stopper member 12E is fitted and used.

In an inverter device, it is necessary to use capacitors having different capacitances according to the rated output. It is necessary to select the one with the content * of 180 uF, 330 oF, or 470 oF.

By the way, as shown in the figure, it is customary to use a cylindrical type capacitor as shown in the figure. At this time, the capacitance can be accommodated by changing the length without changing the diameter. This is also customary, in which case the longer the capacitance, the longer the capacitor.

Therefore, in this embodiment, the position of each slot section 12C is changed in accordance with the length of the capacitor having a different capacitance. For example, the capacitance is 180 / xF When using a capacitor of the type described above, the stopper member 12E is fitted to the innermost slot of the slot part 12C, and the same applies to the capacitor of the capacitor, that is, the capacitor. The stopper member 12E is fitted to the slot portion 12A on the front side (outlet side) in order according to the length of the denser.

Therefore, according to this embodiment, a capacitor 6 having a different capacitance can be used as it is simply by selecting the slot portion 12 A into which the stopper member 12 E is fitted, and the rated output differs. Even when capacitors having different lengths are used as the inverter device, the stopper member 12E functions as a member for holding the capacitor, so that the capacitor 6 can be fixed. It is possible to reliably prevent rattling.

In this embodiment, four slot sections 12A are provided, but it goes without saying that any number of two or more slots may be provided as needed.

Next, another embodiment of the present invention will be described.

First, FIG. 6 shows another embodiment of the present invention, in which 17 is a band member, 18 is a fastener (buckle), and other configurations are shown in FIGS. 1 to 5. This is the same as the embodiment described in the above.

The band member 17 is made of a predetermined length made of synthetic resin or metal. It is made of a shaped member, part of which is attached to both sides of the spacer member 5, and the ends are connected by fasteners 18 so that the capacitor 6 is attached to both sides of the spacer member 5. Functions as a holding member for holding.

Therefore, also in this embodiment, since the main circuit electrolytic capacitor 6 is taken out of the main body of the inverter and attached to the side surface, the height of the main body can be reduced accordingly.

According to this embodiment, since the band member 17 is used to hold the capacitor 6, the configuration is simplified, the cost can be reduced, and the capacitor 6 is exposed. Cooling can be obtained, and the life of the capacitor 6 can be prolonged.

In addition, according to this embodiment, the mounting work of the main circuit electrolytic capacitor 6 is also easy, and it can be easily mounted even after the spacer member 5 is assembled, and when the main circuit electrolytic capacitor 6 is replaced. However, there is no need to disassemble the main unit, simply remove the capacitor box cover 7, remove the first terminal 15A of the electric wire 15 and remove the main circuit electrolytic capacitor 6, and replace it with a new one. Needless to say, maintenance of life parts can be easily obtained.

Next, FIG. 7 shows still another embodiment of the present invention, in which the capacitor 6 is separated from the inverter main body, and the inverter main body is mounted by the leg member 6A for mounting the capacitor. The other components are the same as those of the embodiment described with reference to FIGS. 1 to 6.

Therefore, also in this embodiment, since the main circuit electrolytic capacitor 6 is taken out of the main body of the inverter, the height of the main body can be reduced accordingly.

According to this embodiment, since the leg member 6A is only used for mounting the capacitor 6, the configuration is simplified and cost reduction is achieved. In addition, since the capacitor 6 is exposed, effective cooling can be obtained, and the life of the capacitor 6 can be extended.

Furthermore, by selecting a capacitor whose capacitance corresponds to the sum of the rated outputs of the multiple inverters, multiple inverters can be connected to the capacitor 6 alone, and work and material Cost reduction and space saving can be achieved.

In many cases, cylindrical electrolytic capacitors are commercially available with mounting leg members. According to this embodiment, the use of such a capacitor further increases the cost. It can be reduced.

Next, examples of the present invention will be described more specifically.

First, FIG. 9 shows that the present invention, based on the embodiment described in FIG. 1, has a rated output (rated capacity) ranging from 0.75 KW for a smaller one to about 1.5 KW for a larger one. This is an embodiment in which the invention can be applied commonly to inverter devices. Except for the cooling fin 1 in the embodiment of FIG. The view from the right (right side view) and the view from the bottom (bottom view) are shown. The names and configurations of each part are the same as in FIG. 1, and the dimensions of each part are shown in units of mm.

According to the embodiment shown in FIG. 9, as described above, it is possible to obtain inverter devices of various rated outputs while maintaining the same dimensions as the inverter main body. This can be made more versatile, but this point is described below.

In order to increase the rated capacity of the inverter, the cooling capacity should be increased in accordance with the increase in heat generated by the loss in the main circuit, and the capacitance of the main circuit capacitor should be increased.

By the way, as is apparent from FIG. 9, in this embodiment, the inverter main body is a power unit integrally formed with the terminal blocks 2A and 2B. A spacer member 5 and a control board holder cover 8 are stacked on the module 2, and a capacitor holder 12 is mounted on a side surface of the spacer member 5 to form a unit.

Then, as shown in Fig. 1, the cooling fin 1 is attached to the power module 2 after the unit is formed in this manner, so the size of the cooling fin 1 to be used is The degree can be arbitrarily changed.

On the other hand, the cooling capacity of the inverter can be increased by changing the size of the cooling fins and increasing the heat dissipation area. Therefore, in this embodiment, the dimensions of the inverter main body are not changed. However, by simply changing the size of the cooling fin 1 to be used, first, it is possible to easily cope with the difference in the rated capacity in terms of the cooling capacity.

Next, in this embodiment, the capacitor holder section 12 is configured so that the capacitor 6 to be accommodated therein can be used arbitrarily even if the capacitors have different capacitances. In terms of capacitance, it can easily cope with the difference in rated capacity.

Therefore, according to the embodiment shown in FIG. 9, the size of the cooling fin to be mounted on the inverter main body and the size of the condenser to be accommodated in the condenser holder 12 are determined based on the dimensions shown in the drawing. By simply selecting the capacitance i value of the above, it can be commonly applied to inverter devices with various rated capacities from 0.75 KW for the smaller one to about 1.5 KW for the larger one. In this way, it is possible to provide sufficient versatility at low cost.

Here, there are various methods for increasing the heat radiating area of the cooling fin 1, and a method suitable for this embodiment is exemplified. For example, in FIG. 1, the heat radiating fin of the cooling fin 1 is shown in FIG. One is to consider the method of increasing the height and the number of sheets, and the other is to make the plane shape of the cooling fin 1 larger than the plane shape of the power module 2 in FIG. Further, these methods may be used in combination. However, embodiments of the present invention are not limited to these methods.

Next, the details of each part of the embodiment shown in FIG. 9 will be described. First, FIG. 10 is a diagram showing the rear view of the embodiment shown in FIG. — It is a diagram showing a cross section of each part along each cutting line of B ′, C-C ′, and A—A ′ cross-sectional view shows the internal structure of the power supply board 3 and the control board 7 shown in FIG. Things are omitted.

Next, Fig. 11 shows the details of the parts excluding the power module 2 and the capacitor holder part 12 in Fig. 9 with the left and right side views and plan view, centered on the front view, and the bottom view. FIG. 12 is a sectional view, a rear view, and a perspective view taken along the cutting lines D-D 'and E-E' of FIG.

Next, Fig. 13 shows the details of the inverter main unit in Fig. 9 excluding the capacitor holder unit 12, with a front view as the center, a left and right side view, a plan view, and a bottom view. Further, FIG. 14 shows a cross-sectional view, a rear view, and a perspective view along each cutting line FF ′ and GG ′ in FIG.

FIG. 15 shows the details of the capacitor holder part 12 with the front view as the center, the left and right side views and the plan view, and the bottom view. Further, FIG. FIG. 5 shows a cross-sectional view, a rear view, and a perspective view taken along cutting lines H—H ′ and J-J ′ in FIG.

Further, in FIG. 17, only the spacer member 5 in FIG. 9 is taken out, and details thereof are shown as a side view on the left and right sides, and a plan view on the upper side, centering on the front view. FIG. 9 shows a back view and cross-sectional views taken along cutting lines A--A and B--B. As in FIG. 9, dimensions in mm units are shown.

Therefore, according to FIGS. 10 to 17, it is possible to clearly understand the details of the configuration of each part in the embodiment of FIG. 9, and to fully understand the present invention. By the way, as described above, for example, according to the embodiment of FIG. 9, it is possible to easily obtain an inverter device having various rated outputs by using the same inverter main body including dimensions. At this time, when the present invention is applied to an inverter having a relatively small volume *, the capacitance required for the capacitor of the main circuit can be small, and therefore, as in the above-described embodiment, 2 Even if one capacitor is not used, one capacitor may be sufficient in size.

Therefore, in such a case, as in the embodiment shown in FIG. 18, only one capacitor holder 12 may be attached to one side of the inverter main body.

In addition, this FIG. 18 is a plan view on the upper side centering on the front view, right and left side views on the left and right, and a bottom view on the lower side, except for the cooling fin 1 in the embodiment of FIG. The names and configurations of each part are the same as in Fig. 1.

As is clear from FIGS. 1 and 9 described above, in the embodiment of the present invention, the mounting of the capacitor holder portion 12 to the spacer member 5 is performed by the mounting member 5A on the spacer member 5 side. The mounting member 12B on the side of the capacitor holder 12 is detachable.

Therefore, according to this embodiment, the inverter device can be obtained in the mode shown in FIG. 18 without requiring any special configuration, and as a result, a wide variety of products can be easily provided. It can fully meet the needs of various customers. As shown in Fig. 18, in the case of the embodiment where only one capacitor is used, it is better to mount the capacitor holder 12 on the left side. Wire 15 is short, which is effective in terms of noise absorption.

Next, still another embodiment of the present invention will be described.

The embodiment described below corresponds to a so-called modified example in which the shape of the capacitor holder in the embodiment described with reference to FIGS. 1 and 9 is changed. First, in the embodiment shown in FIG. 19, the shape of the capacitor holder 12 is made semi-cylindrical. Next, in the embodiment shown in FIG. It is a rectangular tube.

Although not shown in FIGS. 19 and 20, as in the embodiment shown in FIG. 1 or FIG. 9, the mounting member 5A is attached to the spacer member 5 side. However, mounting members 12 B are provided on the side of the capacitor holder 12, respectively, so that the capacitor holder 12 can be detachably attached to the spacer member 5.

Therefore, according to the embodiment of FIG. 19 and FIG. 20, in addition to the same operation and effect as the embodiment of FIG. 1 or FIG. It is possible to easily obtain an inverter having a sophisticated appearance and excellent design.

Further, according to the embodiment shown in FIGS. 19 and 20, since the main body side of the inverter and the mounting surface of the capacitor holder are flat, the structure is resistant to vibration and reliability is improved. .

Here, the effects of the above embodiments are listed as follows.

(1) The inverter device can be sufficiently miniaturized including its height.

(2) Since the replacement of the electrolytic capacitor, which is a serviceable component, can be performed extremely easily, maintenance becomes easy and the service life of the device can be extended.

(3) The cost of the product can be greatly reduced by reducing the number of assembly steps.

(4) Wiring is easy because the terminals on the power supply side and the terminals on the load side (motor side) face each other.

(5) As a device that can be mounted on a switchboard, etc., the same terminal arrangement as that of a general electromagnetic switch can be used, so it is a customary wiring work, and it is possible to reduce erroneous wiring essentially during installation. it can. (6) Since it is possible to obtain various types of inverters having different rated outputs without changing the dimensions of the main body, it is possible to easily diversify models and to cope with low cost.

(7) Since various types of inverters having different appearances can be easily obtained without changing the configuration of the main body, an inverter having a sophisticated appearance and excellent design can be obtained. Can be easily provided.

(8) As a result, a wide variety of products can be easily provided, and the needs of various customers can be sufficiently satisfied.

(9) According to the embodiment shown in FIGS. 9 to 18, the length of the electric wire 15 connecting the terminal block 2A and the capacitor 6 can be made sufficiently short, and the wiring inductance is 20 nH Since it can be suppressed to the following, surge overvoltage due to inverter switching operation can be suppressed sufficiently.

(10) Since the capacitor is outside the inverter, even if the capacitor ruptures due to deterioration or the like, there is less danger of causing a secondary disaster to the control circuit inside the inverter, thus improving the reliability.

(11) Since the capacitor holder is opened to the lower side and the capacitor is stored and held inside by a relatively low-strength stopper member, if the capacitor ruptures, it can be pulled down. It is cheap and excellent in all aspects.

(12) According to the configuration excluding the cooling fin, there is an effect that it can be easily attached to other devices.

(13) Since the external connection terminal for mounting the capacitor is provided, the capacitor can be easily mounted outside the case.

(14) Since the mounting direction of the capacitor is parallel to the board, the whole is compact.

(15) Since it is composed of the three elements of the main body case, capacitor part and heat radiating part, there is an effect that these combinations can be freely performed.

(16) The mounting position of the condenser can be selected. Industrial applicability to accommodate various installation locations

According to the present invention, the size in the height direction can be sufficiently reduced even if a large capacitor for a main circuit is used, and a small-sized e-bar device e with good performance can be easily obtained. Therefore, it can be used even when the installation space in the height direction cannot be sufficiently obtained, and an inverter device having wide applicability can be provided.

Claims

The scope of the claims

1. A main body having a forward conversion unit, an inverse conversion unit, a power supply circuit unit, and a control circuit unit in a main body case, a capacitor unit, and a heat radiating unit. Wherein the main body, the capacitor and the radiator are mechanically and electrically connected to each other, and the main body, the capacitor, and the heat radiator are configured as three independent elements. .

2. The inverter device according to claim 1, wherein the capacitor portion is attached to the main body case, and the heat radiating portion is attached to the main body case.

3. The inverter device according to claim 1, wherein a spacer member for mounting the capacitor portion is provided on the main body case.

4. In an inverter device including a main body having a forward conversion unit, an inverse conversion unit, a power supply circuit unit, and a control circuit unit in a main body case, the main body unit is formed substantially in a cubic shape. Each surface of the cube forms a search surface, a heat dissipation surface, a terminal arrangement surface, and a capacitor attachment surface, and the capacitor attachment surface is formed on a surface other than the operation surface, the heat dissipation surface, and the terminal arrangement surface. An inverter device characterized in that:

5. The inverter device according to claim 4, wherein the capacitor mounting surfaces are formed on left and right side surfaces of the main body case.

6. In an indoor device including a main body having a forward conversion unit, an inverse conversion unit, a power supply circuit unit, and a control circuit unit in a main body case, an external connection terminal for electrically connecting a capacitor to the main body unit. An overnight installation device characterized by the provision of

7. The inverter device according to claim 6, wherein the external connection terminal is disposed so as to be biased to one of the main body cases.

8. The inverter device according to claim 6, wherein the capacitor connected to the external surrounding terminal is attached to a portion surrounded by the main body case.

9. An inverter device having a main body having a forward conversion part, an inverse conversion part, a power supply circuit part, and a control circuit part in a main body case, characterized in that a capacitor is mounted behind the front surface of the main body part. Inverter equipment.

10. In an inverter device including a main body having a forward conversion unit, an inverse conversion unit, a power supply circuit unit, and a control circuit unit in a main body case, the main body unit has a cooling surface on a rear surface, and the cooling unit Inverter device characterized by mounting a condenser in front of the surface.

11. The inverter device according to claim 10, wherein the cooling surface is attached to a metal surface of another device.

12. An inverter device including a main unit having a forward conversion unit, an inverse conversion unit, a power supply circuit unit, and a control circuit unit in a main body case, wherein a capacitor is arranged within a thickness of the main body case. Invert the evening.

13. An inverter device including a main unit having a forward conversion unit, an inverse conversion unit, a power supply circuit unit, and a control circuit unit in a main unit case, and a capacitor disposed outside the main unit case, has a small number. A part of the control circuit is assembled on a wiring board, the board is arranged in parallel with the front or rear face of the main body case, and a longitudinal axis of the capacitor is arranged in parallel with the board. An inverter device characterized by

14. The capacitor according to claim 13, wherein the capacitors are arranged on the left and right sides of the main body case, and the capacitors arranged on the left and right sides have their respective longitudinal axes oriented in the same direction. Inverter equipment

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15. A main unit having a forward conversion unit, an inverse conversion unit, a power supply circuit unit, and a control circuit unit in the main unit case, and a capacitor disposed outside the main unit case. An inverter device provided with an inverter, wherein the capacitor is housed in a capacitor holder formed at least in part of a cylinder.

16. The inverter device according to claim 15, wherein a part of said capacitor holder is formed in a semi-cylindrical shape.

17. An inverter device including a main unit having a forward conversion unit, an inverse conversion unit, a power supply circuit unit, and a control circuit unit in a main unit case, and a capacitor disposed outside the main unit case. The inverter device, wherein the capacitor is housed in a capacitor holder formed in a rectangular tube shape.

18. An inverting device comprising: a main body having a forward conversion section, an inverse conversion section, a power supply circuit section, and a control circuit section in a main body case; and a capacitor disposed outside the main body case. An inverter device comprising: means for arbitrarily combining capacitors having different capacitances.

19. The capacitor is housed in a capacitor holder, and the capacitor holder has means for arbitrarily selecting and mounting a capacitor having the same outer diameter and a different length in the axial direction. Item 18. The inverter device according to Item 18.

20. The capacitor holder is configured to be detachable on the left and right sides of the main body case, respectively, and is mounted on both left and right sides of the main body case, and mounted on only one of the left and right sides of the main body case. The inverting device according to claim 19, wherein said inverting device is configured so as to be able to take three kinds of forms in a state where it is not attached to either of the left and right sides of the main body case.

21. In an inverter device including a main body having a forward conversion section, an inverse conversion section, a power supply circuit section, and a control circuit section in a main body case, and a capacitor disposed outside the main body case, The capacitor is mounted independently of the body case so that it can be replaced outside the body case. An inverter device, characterized in that the inverter device is used.

22. In a main unit having a forward conversion unit, an inverse conversion unit, a power supply circuit unit, and a control circuit unit in a main unit case, and an inverter unit fi including a capacitor disposed outside the main unit case, The above-mentioned main body case is provided with a capacitor mounting means for mounting the above-mentioned capacitor.

23. In an inverter device including a main body having a forward conversion section, an inverse conversion section, a power supply circuit section, and a control circuit section in a main body case, and a capacitor disposed outside the main body case, An inverter device characterized in that the capacitor is housed in a capacitor holder that holds the capacitor.

24. The inverter device according to claim 23, wherein the capacitor holder has an opening portion for drawing out an electric wire from the capacitor.

25. The capacitor according to claim 23, wherein the capacitor holder is provided with a holding member for changing the mounting position according to the length of the condenser and holding the capacitor. Inverter device.

26. The capacitor holder includes a cylindrical portion having one end opened downward, and a holding member for closing the one end and holding the capacitor in the cylindrical portion. The inverter device g according to claim 23, which is a feature of the claims.

27. An inverter device comprising: a main unit having a forward conversion unit, an inverse conversion unit, a power supply circuit unit, and a control circuit unit in a main unit case; and a capacitor disposed outside the main unit case. An inverter device, wherein the capacitor is mounted outside the main body case.

28. A main unit having a forward conversion unit, an inverse conversion unit, a power supply circuit unit, and a control circuit unit in the main unit case, and a capacitor disposed outside the main unit case. And an inverter device provided with a cooling fin, wherein the capacitor is mounted outside the cooling fin.