JP2002223569A - Power converter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power converter which can be split into a plurality of unit apparatuses, maintaining the features of a power converter as shown in an example of the conventional case. SOLUTION: The power converter (automatic voltage converter) 1 is fitted with a transformer unit apparatus 4, where a main transformer, an input breaker, and an external wire terminal are mounted; a voltage conversion unit 3 where residual components and the like, necessary for automatic voltage conversion are mounted; and a support stand 98 which has a holding portion 981 and supports the units 3, 4. The external wire terminal has a joint for an external cable only in one longitudinal end of the terminal board. The casing which each of the units 3, 4 has is formed into a rectangular body having identical installation area and are screwed with mutually abutting surfaces. The unit 4 is screwed with a screw 982 into, portion 981 at the lower surface of the lateral side of the casing.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power conversion device including a power conversion component, a component mounting member for mounting the component, and a jacket covering the component in cooperation with the component mounting member. A power converter that can be divided into multiple unit devices while maintaining features such as a common body configuration, easy connection of external cables to external terminal bodies, and an expanded capacity range that can adopt natural air cooling. To provide.

[0002]

2. Description of the Related Art Any frequency of DC power and AC power. 2. Description of the Related Art A power conversion device that performs conversion of AC power having a waveform, peak value, or the like, or conversion of AC power into DC power, and the like is widely used for various applications. In recent years, semiconductor elements with control electrodes such as IGBTs and semiconductor elements such as diodes have been mainly used as conversion elements for performing such power conversion. In addition to using a semiconductor element as the conversion element, a common housing, lighter weight, and lower cost, a wider capacity range in which natural air cooling can be adopted, and easier connection of external cables to external terminal bodies. Was filed by the same applicant and disclosed in Japanese Patent Application Laid-Open No. 2000-341933.
This is known from Japanese Patent Application Publication No. The following Japanese Patent Application Laid-Open
Based on the contents known from JP-A-00-341933, an outline of a conventional power converter will be described with reference to FIGS. 16 to 20 exemplifying a case of an automatic voltage converter for floor installation. .

FIG. 16 is a circuit diagram showing a circuit configuration of a main circuit of a conventional automatic voltage converter. FIG. 17 is a perspective view of the conventional automatic voltage conversion device as viewed from the upper left, facing the front, and FIG. 18 is a perspective view of the device shown in FIG. 17 as viewed from the upper right, facing the front of the device. FIG. 19 shows FIG.
FIG. 20 is a perspective view of the device shown in FIG. 7 with the front cover removed and viewed from the upper left toward the front. FIG. 20 shows the device shown in FIG. It is the perspective view seen from. In FIGS. 16 to 20, reference numeral 9 denotes a conventional floor-mounting automatic voltage converter including a basic unit 9A, an optional unit 9B, and a support base 98. As shown in FIG. 16, the main circuit section of the automatic voltage converter 9 includes a main conversion circuit section 91, two main transformers 92, a protection circuit section 93, and an input breaker 95 as an optional product.

[0004] The main conversion circuit section 91 includes a bidirectionally connected I
AC chopper circuit 911 of high frequency PWM control type using switching element 912 mainly composed of GBT, AC reactor 913, reactor 915 and capacitor 91
6 is provided. The main conversion circuit 91 outputs an AC voltage having the same frequency as the frequency of the AC power supply voltage input from the input terminals U, N, and V. Note that 917 is a snubber capacitor. The main transformers 92, 92 connect the AC voltage output from the main conversion circuit unit 91 in series with the AC power supply voltage. Thereby, the automatic voltage converter 9 outputs the AC output voltage whose voltage value has been adjusted from the output terminals u, n, and v.

[0005] The protection circuit section 93 includes an AC switch element 93.
1, has an auxiliary relay 932, and switches the automatic voltage converter 9 to a direct delivery state when an abnormality such as an overcurrent occurs. The automatic voltage converter 9 includes a controller 941 for the AC chopper circuit 911 and the like, a power supply 942 for the controller 941, in addition to the components shown in FIG. 16 as components for power conversion.
Components such as a cooling body (not shown) for the switching element 912 are provided. In the automatic voltage converter 9, the optional input breaker 95 is connected to the optional unit 9.
B, the main circuit components (including the control device 941, the power supply device 942, the cooling element for the switching element 912, etc.) except the input breaker 95, and the external terminal 97 are mounted on the basic unit 9A.

The basic unit 9A includes the main circuit components,
An external terminal 97, a component mounting body 7A, and a jacket 8A are provided. In the basic unit 9A, the component mounting body 7A and the jacket 8
A and A form a housing. The external terminal 97 includes an external terminal 97A for input terminals U, N, and V, and an output terminal u,
The external terminal 97A and the external terminal 97B have the same structure, and are arranged side by side in the left-right direction when viewed from the front side.
A is attached. External terminal body 97A, 97B
Supports a terminal plate used for the input terminal U and the output terminal u, a terminal plate used for the input terminal N and the output terminal n, a terminal plate used for the input terminal V and the output terminal v, and these terminal plates. It has an insulator not shown. Each terminal plate is formed in a flat plate shape having a rectangular surface shape using a copper plate material.
v is set the longest.

[0007] These terminal plates are arranged in parallel with the back surface of the component mounting body 7A, and are laminated using insulators in the depth direction of the component mounting body 7A as shown in the figure. The external terminal bodies 97A and 97B are configured to be mountain-shaped as a whole when viewed from the side. Then, these terminal plates are connected to an external cable (not shown) at both ends in the longitudinal direction.
Holes 971 are formed for connecting external wires to the outside of the automatic voltage converter 9. All the through holes 971 are used to connect external cables only from the front side. It is formed at a position where it can be made. In addition, in all terminal plates, an extension connection portion for connecting an extension (an electric wire connecting between the terminal plate and the main transformer 92) is formed at an intermediate portion of the through holes 971 formed at both ends. ing.

[0008] The component mounting body 7A is made of a thin steel plate material, is bent into an L-shape to form a back surface and a bottom surface, and a right angle inward from an edge of the component mounting portion. The main circuit component and the external terminal 97 are attached to the component mounting portion.
And so on. At the upper and lower portions of the rear surface of the component mounting portion, ventilation holes (not shown) for cooling air are formed, and mounting portions (not shown) for mounting members (not shown) are provided at each of the four corners and other important points. (For mounting a rear cover body for securing a road, a mounting bracket for wall hanging, etc.).
Also, external terminal bodies 97A and 97B on the bottom surface of the component mounting portion.
An opening for drawing in an external cable is formed in a portion opposed to.

The jacket mounting portion has a function of mounting the jacket 8A and a function of a reinforcing member for increasing the rigidity of the component mounting body 7A, and extends around the edge of the component mounting portion. A total of six are formed. Screw holes 71 (FIG. 19, FIG. 19) used for attaching the jacket 8A to the component mounting body 7A, fixing the component mounting body 7A to the support base 98, and the like. 20 is shown). Thus, these jacket mounting portions are not subjected to any joining treatment between them, and are used in a state of being bent at a right angle.

The outer cover 8A has a front cover 81A and a side cover 82A made of a thin steel plate. The side cover body 82A has a ceiling portion and a side portion portion on the side opposite to the optional unit portion 9B formed integrally, and a body portion formed as an L-shape rotated by 180 ° as a whole, and a front surface portion of the body portion. A bent portion formed by being bent inward at a right angle from the edge portion. An opening 83 for an external cable is formed in the ceiling, and a vent 84 through which cooling air flows is formed in the side. The bent portion formed continuously to the respective edges of the ceiling and side portions,
As in the case of the outer-body mounting portion of the component mounting body 7A, no joining treatment is performed between them, and the component mounting body 7A is used while being bent at a right angle.

The front cover body 81A is provided with a component mounting body 7A.
And a main body formed in a rectangular shape so as to cover a front opening formed by the front cover 82A and the side cover 82A, and an upper portion of the main body, a side portion on the side opposite to the optional unit portion 9B and a side portion on the optional unit portion 9B side. As shown in the figure, a bent portion is formed at a right angle from a side edge and is formed integrally with the main body. In the main body of the front cover body 81A, there are formed vents 85 through which cooling air flows. As in the case of the bent portion of the side cover body 82A, the bent portion of the front cover body 81A is not subjected to any joining treatment between them, and is used while being bent at a right angle. Is done. Then, the side cover body 82A
Are fastened by screws using screw holes 71 in the outer body mounting portion of the component mounting body 7A, and the front cover body 81A is a screw formed in the bent portion of the screw hole 71 and the side cover body 82A. It is fastened with a screw using the hole 89.

The optional unit 9B includes the component mounting body 7
B, a jacket 8B, and an input breaker 95, which is an optional part of the automatic voltage converter 9 of the conventional example. In the option unit section 9B, a housing is formed by the component mounting body 7B and the jacket 8B. The component mounting body 7B has exactly the same shape and dimensions as those of the component mounting body 7A when viewed from the side, and has the same configuration as the component mounting body 7A. That is, the component mounting body 7B is manufactured using a thin steel plate material, and is formed integrally with the component mounting portion by being bent at an L-shape and bent at a right angle from an edge of the component mounting portion. And an outer-body mounting portion. A screw hole 71 (a part of which is shown in FIGS. 19 and 20) used when the outer body 8B is mounted on the component mounting body 7A or the like.
Are formed. The component mount 7 of this component mount 7B
The main difference from A is that the width dimension is shorter than that of the component mounting body 7A because there are few components to be mounted.

The outer cover 8B includes a front cover 81B and a side cover 82B made of a thin steel plate. The front cover body 81B and the side cover body 82B
As in the case of the component mounting body, the shape, dimensions and structure viewed from the side are the same as the front cover body 81A and the side cover body 82A of the basic unit 9A, and the main difference is the width dimension. Is short. However,
The basic shape of the side cover body 82B is formed in an inverted L-shape as a whole, and is in plane symmetry with the side cover body 82A. Then, the optional unit portion 9B is a side surface portion not covered by the side surface cover body 82B of the component mounting body 7B, and a side surface portion not covered by the side surface cover body 82A of the component mounting body 7A of the basic unit portion 9A. Are fastened using screws (not shown).

The support base 98 has a role of mounting the basic unit 9A and the optional unit 9B fastened to each other on the floor surface, and has, on both upper sides thereof, bottom surfaces of the component mounting bodies 7A and 7B. A holding portion 981, which fastens and holds the basic unit 9A and the optional unit portion 9B by using the screw holes 71 formed in the outer cover mounting portion.
981 are formed. Then, the basic unit 9A
And the optional unit 9B, the holding units 981, 981
Is fastened to the support base 98 by the screw 982 loaded in the screw hole 71 through the through-hole formed in the support base 98. Since the automatic voltage converter 9 of the conventional example is configured as described above, it can obtain many features described below.

The component mounting portions 7A and 7B are provided with main circuit components including optional components such as the input breaker 95, components such as a control device 941, a power supply 942, a cooling body for the switching element 912, and an external terminal 97. It is possible to combine the function of mounting and holding and the function of the back and bottom portions of the conventional housing. This makes it possible to reduce the weight of the automatic voltage converter 9 and the manufacturing cost. Further, the component mounting bodies 7A and 7B can have high rigidity because the outer body mounting portions are formed as described above, even though the component mounting bodies 7A and 7B are made of a thin plate material. As a result, a ventilation hole through which cooling air flows can be formed on the back surface of the component mounting bodies 7A and 7B, and the cooling effect of components by natural convection of air can be increased. Thereby, the automatic voltage converter 9 can expand the capacity range in which the natural air cooling system can be adopted. Also, the component mounting body 7A, the jacket 8A and the component mounting body 7B,
The outer cover 8B is connected to each other by screws fastened to the plurality of screw holes 71 and is formed in a box shape, so that a high rigidity value can be obtained as a whole irrespective of the thin plate material. This makes it possible to reduce the weight and the manufacturing cost of the automatic voltage converter 9. Also, since the external terminal body 97 is configured as described above,
Fastening of the external cable to all the through-holes 971 of the external terminal body 97 without being affected by the drawing condition of whether the external cable is drawn into the automatic voltage converter 9 at the lower part or the upper part. The operation can be easily performed only by the operation from the front side of the basic unit 9A. The basic unit 9A and the optional unit 9B
In addition to being used for floor mounting, it can be used for wall hanging as it is, and can be used for build-in by not using the jackets 8A and 8B. That is, the configuration method of the automatic voltage converter 9 is such that the basic unit 9A and the optional unit 9
B can be shared. Furthermore, the presence or absence of optional parts and the needs of various contents of optional parts can be met by adding an optional unit part (such as the optional unit part 9B) in which the required optional parts are mounted on the basic unit part 9A. When combined with the above, it becomes possible to handle the basic unit 9A on which common parts are mounted as a standard product, and it is possible to reduce the manufacturing cost and the production delivery time.

[0016]

The automatic voltage converter 9 according to the prior art described above has a common housing, reduced weight and reduced cost, an expanded capacity range in which natural air cooling can be adopted, and an external terminal of an external cable. Although it has been possible to facilitate the connection of the automatic voltage converter, as the adoption of automatic voltage converters expands, the following points will be highlighted as new problems, A solution is desired. That is, (1) In the automatic voltage converter 9, all the common parts are replaced with one.
It is mounted on the basic unit 9A. The reason why the automatic voltage converter 9 cannot disperse and mount the common components on the plurality of component mounting bodies 7A is because the external terminal 97 used is not used.
In the structure. That is, in order to obtain the features described in the above section, the external wire terminal body 97 uses terminal plates having different lengths for different terminals. These terminal plates are arranged such that a longer terminal plate is placed in a lower layer, and are stacked so as to be parallel to the back surface of the component mounting body 7A, and a through hole 971 for connecting an external cable is provided. Etc. are formed at both ends of the terminal plate.

In consideration of the connection of the external cable to the external terminal 97, a space having a width substantially equal to the width of the external terminal 97 needs to be secured for routing the external cable. There is. That is, in the case where a plurality of component mounting bodies 7A are used, it is necessary to secure a space having the above-mentioned width dimension for the routing of the external cable even if the component mounting body 7A to which the external terminal body 97 cannot be mounted. become. As a result, when a plurality of component mounting bodies 7A are used, the space for routing the external cable increases, so that the size and cost of the automatic voltage converter 9 as a whole are increased. Become. Therefore,
In the automatic voltage converter 9, all of the common components must be mounted on one basic unit 9A.

(2) Since the external terminal body 97 has a structure suitable for obtaining the above-mentioned features, it is difficult to make the external terminal body 97 compact while maintaining the basic structure as it is. (3) Since the weight and the outer shape of the basic unit 9A increase as the capacity increases due to the reasons (1) and (2), the installation work of the automatic voltage converter 9 becomes difficult.
That is, for the installation of the automatic voltage converter 9, two or more workers are required because one person's work is difficult,
In some cases, a transport device and jigs are required.

(4) When the capacity is increased and the basic unit 9A is enlarged, it is necessary to secure a large installation space for the automatic voltage converter 9. SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems of the related art, and has as its object to provide a power converter that can be divided into a plurality of unit devices while maintaining the features of the conventional power converter. .

[0020]

SUMMARY OF THE INVENTION According to the present invention, there are provided the following objects: 1) A component mounting body having components for power conversion and a component mounting portion having a substantially L-shaped cross section for mounting the components. In the power conversion device comprising: a plurality of parts, the parts attached to each of the parts and the parts attached to which the respective parts groups are attached; and an outer surface covering four surfaces excluding a part of the parts attached around the parts attached. A plurality of unit devices having a rectangular parallelepiped outer shape having a body and being electrically connected to each other by an extension connecting and connecting the respective devices, and the component mounting of the component mounting body of each unit device; The part has substantially the same shape and dimensions of the part corresponding to the lateral side of the L-shape, and one of these unit devices is connected between the power converter and the outside of the power converter. The outside wire An external wire terminal body for connection is provided, and each of the elongated terminal plates made of a conductive material for connecting the external wires of the external wire terminal body has a connection portion of the external wire in one of the longitudinal directions of the terminal plate. Or 2) in the means described in the above item 1, wherein the unit device is disposed adjacent to a part corresponding to the L-shaped side of the component mounting portion. The component mounting body of the device is
The component mounting portion has one fixing portion for fixing to a unit device adjacent to a portion corresponding to the lateral side of the L-shape, and the outer portion facing the portion corresponding to the lateral side of the L-shape of the component mounting portion. The unit device, which is to be provided with the unit device adjacent to the portion of the object, has a portion of the outer device facing the portion corresponding to the L-shaped side of the component mounting portion. And the other fixing part combined with the one fixing part, or 3) In the means described in the above item 1 or 2, a support table on which one or a plurality of the unit devices is mounted is provided. And the outer cover is provided with the L on each side surface that shares parts corresponding to both the vertical and horizontal sides of the L-shaped part mounting part.
A support base fixing portion for fixing to the support base near a portion corresponding to the horizontal side of the character and / or near a portion opposite to the portion corresponding to the horizontal side of the L-shape; Is achieved by

[0021]

Embodiments of the present invention will be described below in detail with reference to the drawings. In the following description, the same parts as those of the conventional automatic voltage converter shown in FIGS. 16 to 20 are denoted by the same reference numerals, and description thereof will be omitted. Further, in the subsequent drawings, as to the reference numerals given in FIGS. 16 to 20, only representative reference numerals are described as much as possible. First, a configuration of a power converter according to an embodiment of the present invention will be described with reference to FIGS. 1 to 9 as a representative of an automatic voltage converter for floor installation. Here, FIG. 1 is a perspective view of the automatic voltage converter according to an embodiment of the present invention, as viewed from the upper left, facing the front, and FIG. 2 is viewed from the upper right, facing the front of the device shown in FIG. It is the perspective view seen.

FIGS. 3A and 3B are perspective views of the voltage conversion unit device shown in FIG. 1, wherein FIG. 3A is a perspective view from the upper left of the device facing the front of the device, and FIG. 3B is the upper right of the device facing the front of the device. It is the perspective view seen from the direction. FIG. 4 is a perspective view of the voltage conversion unit device shown in FIG. 3 (a) with the outer cover removed, and FIG. 5 is a perspective view of the voltage conversion unit device shown in FIG. 3 (b). It is the perspective view which removed and showed. FIG. 6 is a perspective view of the transformer unit device shown in FIG. 1 as viewed from the upper left, and FIG. 7 is a perspective view of the transformer unit device shown in FIG. FIG. FIG. 8 is a perspective view of the transformer unit device shown in FIG. 6 with a jacket removed, and FIG. 9 is a perspective view of the transformer unit device shown in FIG. 7 with the jacket removed. FIG.

1 to 9, reference numeral 1 denotes an automatic voltage for floor installation according to an embodiment of the present invention, which includes a voltage conversion unit device 3, a transformer unit device 4, and a support base 98. In the converter, the main circuit, its constituent elements, the control device associated with the main circuit, and the functions of the control device are the same as those of the automatic voltage converter 9 of the conventional example. The voltage conversion unit device 3 includes a conversion circuit section 31, a component mounting body 34, and a jacket 37, and the component mounting body 34 and the jacket 37 form a housing of the voltage conversion unit device 3. When the conversion circuit unit 31 is compared with the case of the automatic voltage conversion device 9 of the conventional example, the conversion circuit unit 31 has the same functions and specifications as the main conversion circuit unit 91 of the automatic voltage conversion device 9, but is reduced in size. Circuit part 3
2 and a control device 33 that is reduced in size as a whole by integrating the protection circuit section 93, the control device 941, and the power supply device 942 of the automatic voltage converter 9. A cooling body 321 for cooling a switching element (not shown) is attached to the main conversion circuit section 32. When the component mounting body 34 is compared with the component mounting body 7A of the automatic voltage converter 9 of the conventional example, the basic configuration is almost the same.

That is, a ventilation port 351 for cooling air is formed in the rear part 35 almost in the same manner as in the case of the automatic voltage converter 9, and has the same purpose as that formed in the automatic voltage converter 9. As a mounting member mounting portion (for mounting a back cover body for securing a cooling air passage or a mounting bracket for wall hanging), each of the bent portions connected to the back portion 35 is mounted at a central portion in the height direction. A member mounting portion 352 is formed. The mounting member mounting portion 352 has one screw hole 35.
3 and two through holes 354 arranged with the screw hole 353 at the center. In addition, unlike the automatic voltage converter 9, the component mounting body 34 has a horizontal portion (a portion corresponding to the horizontal side of the L-shape) 36 of the component mounting portion having an L-shaped cross section, and an extension (not shown). , And four through holes (one fixing portion in this case) used to fix the voltage conversion unit device 3 to the transformer unit device 4.

The jacket 37 is replaced with a conventional automatic voltage converter 9.
When compared with the jacket 8A of the automatic voltage converter, the automatic voltage converter 1 is not provided with the optional unit on the side surface of the voltage converter 3 in comparison with the case 8A. Since the voltage conversion unit device 3 does not include an external terminal, it is not necessary to provide a removable front cover, so the configuration is different. That is, the outer cover 37 is formed so as to substantially cover four surfaces excluding the part mounting portion of the component mounting body 34,
It is fastened by screws using the screw holes 71 of the component mounting body 34 to form a housing for the voltage conversion unit device 3 having a rectangular parallelepiped outer shape. A vent 84 and a screw hole 38 (a fixing portion for the support in this case) for fixing the holding portion 981 of the support 98 to each of the two side surfaces of the outer cover 37 are formed. .

The screw hole 38 is formed in the part mounting part of the L-shaped cross section of the part mounting body 34 in the vicinity of the part corresponding to the L-shaped side and on the side opposite to the L-shaped side. In the vicinity. Also, the front portion 37 of the jacket 37
1, a vent 85 and the like are formed similarly to the main body of the front cover body 81A of the conventional example. Then, the horizontal portion 372 of the jacket 37 which is a wall surface facing the horizontal portion 36 of the component mounting body 34 of the casing of the voltage conversion unit device 3 is not formed with a through-hole or the like and remains in a flat state. is there. The jacket 37 is made of a thin steel plate, for example, and has a rectangular front surface 3.
71, the respective side portions connected to both sides of the front portion 371, and the horizontal portion 372 connected to the upper portion of the front portion 371 are integrally formed, and both sides and the upper portion of the front portion 371 are formed. Then, the side portion and the horizontal portion 372 are bent, and the joint between the side portion and the horizontal portion 372 is spot-welded (see FIGS. 3 to 5).

The transformer unit device 4 includes a main transformer 92,
92, an input breaker 95, an external terminal 41, a component mounting body 43, and a casing 5. The component mounting body 43 and the casing 5 form a housing of the transformer unit device 4. The input breaker 95 is an optional product as in the case of the automatic voltage converter 9 of the conventional example. The external line terminal body 41 is significantly different from the conventional external line terminal body 97, and includes an insulating base 42 made of an electrically insulating material and a plurality of terminals (not shown) attached to the insulating base 42 side by side in a plane. And a plate. These terminal plates are formed in a flat plate shape having a rectangular surface shape using a copper plate material, and their length dimensions are all the same. Near one end of these terminal plates in the longitudinal direction, an external line connecting portion (such as a screw hole) (not shown) for connecting an external cable 19 described later is formed, and near the other end in the longitudinal direction. An extension connecting portion (such as a screw hole) (not shown) for connecting the extension is formed. With such a configuration, the lengths of these terminal plates are greatly reduced as compared with the shortest U / u terminal plate of the conventional example.

Then, the external line terminal 41 is used to connect the external cable 19 to the external line connection part by the transformer unit device 4.
Of the terminal plate to which the external cable 19 is connected, so that the position near one end of the terminal plate is relatively close to the opening 46 described later. It is attached to. Further, since the insulating base 42 is provided with an electric insulating barrier as shown in the figure in order to secure a sufficient electric insulating distance between the terminal plates and the like, the mutual distance between the terminal plates and the like are the same as those of the conventional external terminal 97.
Is shorter than in the case of When the component mounting body 43 is compared with the component mounting body 7A of the automatic voltage converter 9 of the conventional example, its basic configuration is substantially the same, and cooling is performed in the main part of the rear part almost in the same manner as in the case of the automatic voltage converter 9. A ventilation port 44 for air for use is formed, and a mounting member mounting portion 352 is formed at each of the center portions in the height direction of the bent portions connected to the back surface, just like the component mounting body 34. ing.

The horizontal portion (the portion corresponding to the lateral side of the L) 45 of the component mounting portion having the L-shaped cross section of the component mounting body 43 is, like the automatic voltage converter 9, similar to the automatic voltage converter 9. An opening 46 that allows the external cable 19 to penetrate is formed at a portion facing the external terminal 41. The shape and dimensions of the horizontal part 45 of the component mounting body 43 are the same as the shapes and dimensions of the horizontal part 36 of the component mounting body 34 of the voltage conversion unit 3. When the jacket 5 is compared with the jacket 8A of the automatic voltage converter 9 of the conventional example, it is equivalent to being manufactured using a thin steel plate material, but the automatic voltage converter 1 has a voltage conversion unit device. The configuration is slightly different because the option unit is not provided on the side surface of No. 3. That is, the outer cover 5 is formed so as to substantially cover four surfaces except for the part mounting portion of the component mounting body 43, and is fastened by screws using the screw holes 71 of the component mounting body 43 to form a rectangular parallelepiped outer shape. A housing for the transformer unit device 4 having a shape is formed.

The outer cover 5 includes a front cover 51 and a side cover 54. The side cover body 54 of the outer cover 5 has the horizontal part 55 and the side parts 58, 58 integrally formed, and in the state shown in FIGS.
It is formed in a character shape. A vent 84 and a screw hole 38 are formed in each of the side surfaces 58, similarly to the side surface of the jacket 37 of the voltage conversion unit device 3. In the horizontal portion 55, through holes 56 and 361 for passing an extension (not shown) are respectively formed in portions facing the through holes 361 and 361 formed in the horizontal portion 36 of the component mounting body 34 of the voltage conversion unit device 3. 56 are formed. In the horizontal portion 55, the transformer unit device 4 is connected to each of the portions facing the four through holes 362 formed in the horizontal portion 36 of the component mounting body 34 of the voltage conversion unit device 3. Four screw holes (the other fixing portion in this case) 57 used for fixing with each other are formed. The side cover body 54 is fastened to the component mounting body 43 by screws using the screw holes 71 of the component mounting body 43.

The front cover 51 of the outer cover 5 is
When viewed from the side, a U-shape is formed. The front portion 52 has a ventilation hole 8 similar to the main body of the conventional front cover body 81A.
5 and the like are formed, and are detachably attached to the side cover body 54 by screws 53 (see FIGS. 6 to 9). In addition, the opening (for example,
Depending on the installation state of the opening 46 and the opening 361 and the opening 56, appropriate closing plates are conventionally mounted on the automatic voltage converter 1 to prevent dust or the like from entering the inside of the automatic voltage converter 1. This is the same as the case of the automatic voltage converter 9 in the example, but the description is omitted because it is well known.

The installation of the automatic voltage converter 1 is performed as follows. First, the transformer unit device 4 is brought into contact with the upper portion of the support base 98 at the horizontal portion 45 of the component mounting body 43, and the screw hole 38 of the jacket 5 is passed through the through hole of the holding portion 981 as in the conventional example. Is fastened to the support base 98 by the screw 982 loaded in the. Next, the voltage conversion unit device 3
However, the horizontal portion 36 of the component mounting body 34 is brought into contact with the horizontal portion 55 of the jacket 5 of the transformer unit device 4 so that the four through holes 3
It is fastened to the transformer unit device 4 by screws (not shown) loaded into each of the four screw holes 57 through 62, and the installation operation of the automatic voltage converter 1 is completed.

A method of connecting an external cable to the automatic voltage converter 1 will be described with reference to FIGS.
Here, FIG. 10 is an explanatory diagram for explaining a state of the automatic voltage converter shown in FIG. 1 being pulled in from the lower side of the external cable, and FIG. It is explanatory drawing shown except the front part of the jacket. FIG. 12 is an explanatory view for explaining the state of the external cable being pulled in from the upper side of the external cable of the automatic voltage converter in which the installation method is slightly changed from FIG. 1. FIG. 13 shows the state of drawing the external cable according to FIG. It is explanatory drawing shown except the front part of the jacket. By the way, FIG. 10, FIG.
In the automatic voltage converter 1 shown in FIG. 1, the connection portion of the external cable 19 of the external terminal 41 is disposed on the support 98 side of the transformer unit device 4.

That is, the automatic voltage converter 1 in this case
Is an automatic voltage converter configured to draw in the external cable 19 by pulling down. Then, the external cable 19 that has been routed to the vicinity of the installation position of the automatic voltage converter 1 by a wiring pit or a wiring duct (both not shown).
Is the opening 46 of the component mounting body 43 of the transformer unit device 4.
(Refer to FIG. 8 and FIG. 9), it is drawn into the transformer unit device 4 and connected to the connection of the external cable 19 of the external terminal 41. The installation work of the automatic voltage converter 1 shown in FIGS. 12 and 13 is performed as follows.
The description of this part will be made with reference to FIGS.

First, the voltage conversion unit device 3 is rotated by 180 ° from the posture shown in FIG. 1 so that the horizontal portion 372 of the jacket 37 abuts on the upper portion of the support base 98, and the holding portion 98
1 through the through hole, the screw hole 38 of the jacket 37 (however,
The component mounting body 34 is fastened to the support base 98 by a screw 982 loaded in a screw hole 38) formed near a portion opposite to the side of the L-shape. Next, the transformer unit device 4
Is rotated by 180 ° with respect to the posture shown in FIG.
Of the voltage conversion unit device 3 with the horizontal portion 55
4 and is fastened to the voltage conversion unit 3 by screws (not shown) loaded in the four screw holes 57 through the four through holes 362, and the automatic voltage converter 1 is installed. Work is completed.

In the automatic voltage converter 1 shown in FIGS. 12 and 13, the connection of the external cable 19 of the external terminal 41 is located at the top of the automatic voltage converter 1. The conversion device 1 is an automatic voltage conversion device configured to pull in the external cable 19 by pulling in the upper side. External cable 1 for this automatic voltage converter 1
9 is connected to the outside of the transformer unit device 4 through the opening 46 of the component mounting body 43 of the transformer unit device 4 through the external cable 19 that has been routed to the vicinity of the installation position of the automatic voltage converter 1 by a wiring duct (not shown). And is connected to the connection portion of the external cable 19 of the external terminal body 41.

Next, a modification of the automatic voltage converter 1 in which the installation method is further different is shown in FIG. 14 (explanatory diagram for explaining an automatic voltage converter in which the installation method is slightly changed from the automatic voltage converter shown in FIG. 1). ) And FIGS. 3 to 9.
In this case, the transformer unit device 4 is brought into contact with the upper portion of the support base 98 at the horizontal portion 45 of the component mounting body 43, and through the through hole of the holding portion 981 as in the case of the conventional example, the screw hole 38 is formed. Is fastened to the support base 98 by the screw 982 loaded in. Further, the voltage conversion unit device 3 includes a support 98 at the horizontal portion 36 of the component mounting body 34 (in this case, a support 98 dedicated to the voltage conversion unit 3 and a support 98 for the transformer unit 4). Are separated from each other), and are fastened to the support base 98 by screws 982 loaded in the screw holes 38 through the through holes of the holding portion 981 as in the case of the transformer unit device 4.

The electrical connection between the voltage conversion unit 3 and the transformer unit 4 is made by an extension cable 18 which is also routed outside the voltage conversion unit 3 and the transformer unit 4. In this case, the extension cable 18 is an extension cable 181 (indicated by a dashed line in FIG. 14) serving as an input wiring and an extension cable 182 serving as an output wiring when viewed from the transformer unit device 4.
(Represented by a two-dot chain line in FIG. 14). These extension cables 181 and 182 are formed on the horizontal portion 36 of the component mounting body 34 of the voltage conversion unit device 3.
And one of the two through holes 361 and one of the two through holes 56 formed in the horizontal portion 55 of the side cover 54 of the outer cover 5 of the transformer unit device 4. Is done.

Then, the extension cables 181 and 182 are connected to the voltage conversion unit 3 and the transformer unit 4, and the installation of the automatic voltage converter 1 in this case is completed, and the connection of the external cable 19 is completed. Is retracted from below (Fig. 1
1). In the description with reference to FIG. 14, it is assumed that the external cable 19 is pulled into the automatic voltage converter 1 by being pulled down. However, for example, if the installation posture of the transformer unit device 4 in the holding portion 981 is rotated by 180 ° from the state illustrated in FIG. 14, the automatic voltage converter 1 can set the drawing of the external cable 19 to the upper drawing. it can. The method of rotating the installation posture of the transformer unit device 4 or the like on the holding portion 981 by 180 ° is described in FIGS.
3 is based on the case described above.

The automatic voltage converter 1 according to one embodiment of the present invention shown in FIGS. 1 to 14 has the above-described configuration, and can obtain the following various features. (1) By adopting the external terminal 41 having the above-described configuration as an external terminal for connecting an external cable, it is possible to shorten the mutual interval of the terminal plates, shorten the length of the terminal plates, and the like. The external terminal 41 is greatly reduced in size. Thus, in spite of the fact that the external line terminal body 41 has such a feature, the automatic voltage converter 1 requires the transformer unit device 4 to connect the external cable to the external line connecting portion in the same manner as in the conventional example. Can be performed only from the front side of the vehicle. Also, (2) since the connection point of the external cable to the external terminal 41 can be limited to one end in the longitudinal direction of the terminal plate, the transformer unit device 4 on which the external terminal 41 is installed is a component mounting member. The space on the opposite side of the external cable with respect to the external terminal terminal 43 can be used for installing components (see FIGS. 8, 9, 11, and 13). The feature of effective use of the space on the non-connection side of the external cable obtained by the transformer unit device 4 is not limited to the transformer unit device 4, but in this case, the voltage conversion unit device 3 All of the mounting space for the components of the mounting body 34 can be used for mounting the components (see FIGS. 4, 5, 11, and 13).

That is, the configuration method using a plurality of unit devices exemplified in the automatic voltage conversion device 1 can solve the problem that the size of the entire automatic voltage conversion device is increased unlike the conventional example. As a result, the automatic voltage converter 1 divides the component mounting body into a plurality (two parts, the component mounting body 34 and the component mounting body 43), and divides the parts and the component mounting body into a plurality of groups. Plurality of unit devices (voltage conversion unit device 3 and transformer unit device 4)
The individual unit devices are reduced in size and weight. As a result, when the automatic voltage converter 1 is installed, since the installation work can be performed for each unit device, for example, even the work by one person can be easily performed. (3) Since the automatic voltage converter 1 can be configured by using a plurality of unit devices, as illustrated in FIG. 14, individual unit devices can be separately installed. Thereby, even if it is not possible to secure a wide installation space for installing the entire automatic voltage converter, if a space for installing individual unit devices can be secured,
Even a large-capacity automatic voltage converter can be installed. (4) In the automatic voltage converter 1 in which a plurality of unit devices are used, a horizontal portion (for example, a voltage) of a component mounting portion having an L-shaped cross-sectional shape of a component mounting body contacting an adjacent unit device. The horizontal portion 36 of the conversion unit device 3 has a through hole through which an internal line passes, and one fixing portion (for example, one fixing portion used to fix the unit device to be abutted).
It has a through hole 362) of the voltage conversion unit device 3. In addition, the horizontal portion of the jacket (for example, the horizontal portion 55 of the transformer unit device 4) which is in contact with the adjacent unit device,
It has a through hole through which the extension passes and the other fixing portion (for example, the screw hole 57 of the transformer unit device 4) used to fix the unit device to be abutted. Since one fixed portion and the other fixed portion are formed at the contact portions of the unit devices adjacent to each other, a plurality of unit devices can be fastened to each other and can be handled as an integrated device. . When it is not necessary to fasten a plurality of unit devices to each other as in the case illustrated in FIG. 14, it is not necessary to form one fixing portion and the other fixing portion. (5) In the automatic voltage converter 1, component mounting bodies (for example, components of the voltage conversion unit 3) are provided on both side surfaces of the unit body (for example, the jacket 37 of the voltage conversion unit 3). Mounting body 34)
Of the component mounting portion having the L-shaped cross section of the support base fixing portion (screw) near the portion corresponding to the lateral side of the L-shape and near the portion opposite to the lateral side of the L-shape. A hole 38) is formed. As a result, while using the external terminal body 41 in which the connection point of the external cable to the external terminal body is limited to one end in the length direction of the terminal plate, the floor surface is exemplarily shown in FIGS. The installed automatic voltage converter 1 can cope with both of the lower-side drawing and the upper-side drawing-in method of the external cable.

As a method for pulling in the external cable,
In the case of an automatic voltage converter that only needs to be able to respond to one of the lower retraction or the upper retraction, the support base fixing portion is
Only one of the vicinity of the part corresponding to the lateral side of the L-shaped part and the vicinity of the part opposite to the lateral side of the L-shaped part of the component mounting part having the L-shaped cross section may be formed. . In the case of an automatic voltage converter installed by a wall mounting method or the like, it is not necessary to form the support base fixing portion.

(6) The configuration of the automatic voltage converter 1 is the same as the configuration of the conventional automatic voltage converter 9 in terms of the installation method of the automatic voltage converter. As in the case of the conversion device 9, the unit devices (the voltage conversion unit device 3 and the transformer unit device 4) can be applied as they are to wall-mounted installation other than floor installation, build-in installation, and the like. As a result, it becomes possible to handle the unit device as a standard product, and it is possible to reduce the production cost and the production delivery time.

Finally, a configuration of a power converter according to a different embodiment of the present invention will be described with reference to FIG. 15 exemplifying a case of an automatic voltage converter for floor installation. FIG. 15 is a front view showing an automatic voltage converter according to a different example of the embodiment of the present invention. In the following description, the same portions as those of the automatic voltage converter according to the embodiment of the present invention shown in FIGS. 1 to 14 are denoted by the same reference numerals, and description thereof will be omitted. Further, in FIG. 15, as to the reference numerals given in FIGS. 1 to 14, only representative reference numerals are described as much as possible.

In FIG. 15, reference numeral 2 denotes a floor installation according to a different example of the embodiment of the present invention comprising a voltage conversion unit device 3, a transformer unit device 4A, an optional unit device 2A, and a support base 98. Automatic voltage converter for use in the automatic voltage converter 1 according to the present invention,
It has all the control devices. The automatic voltage converter 2 has, as optional components, a WHM 96, a fuse, a CT, and an auxiliary terminal (not shown) in addition to the input breaker 95 of the automatic voltage converter 1, and all of these optional components are It is mounted on the option unit device 2A together with the external terminal 41. The optional unit device 2A includes the optional component described above and the component mounting body 4
3A, a jacket 5A, a component mounting body 43A and a jacket 5A.
A forms the housing of the option unit device 2A.

The configuration and shape of each of the component mounting body 43A and the jacket 5A are basically the same as the component mounting body 43 and the jacket 5 of the transformer unit device 4 of the automatic voltage converter 1. Only minor corrections have been made in response to differences in some of the mounted components. Therefore, the description is omitted to avoid duplication. Transformer unit 4A
Are the main transformers 92, 92, the component mounting body 43B, the jacket 5
B, and the casing of the transformer unit device 4A is formed by the component mounting body 43B and the jacket 5B. Component mounting body 43
The configuration and the shape of each of B and the casing 5B are basically the same as the component mounting body 43 and the casing 5 of the transformer unit device 4 of the automatic voltage converter 1, and one of the components to be mounted. Only minor corrections have been made for the different parts. Therefore, the description is omitted to avoid duplication.

The automatic voltage converter 2 configured as described above
In the automatic voltage converter 1, the installation operation and the external cable pull-in operation are performed by the same contents as those described with reference to FIGS. 10 and 11 for the automatic voltage converter 1. The automatic voltage converter 2 according to a different example of the embodiment of the present invention shown in FIG. 15 has the above-described configuration, so that the automatic voltage converter 1 shown in FIGS. The device 2 can be composed of three units: a voltage conversion unit device 3, a transformer unit device 4A, and an optional unit device 2A.

The automatic voltage converter 1.2 will now be described in a comprehensive manner.
2) commonization of the housing configuration of the automatic voltage converter 9 of the conventional example, simplification of connection of the external cable to the external terminal body,
The above-mentioned (1) to (6) described for the automatic voltage converter 1 by being able to configure the automatic voltage converter with a plurality of unit devices while maintaining features such as expansion of the capacity range in which the natural air cooling system can be adopted. Features can be obtained. In addition,
These features can be obtained from the description of the automatic voltage converter 2 even when the number of unit devices is three or more.

The installation methods of the plurality of unit devices belonging to the same automatic voltage converter do not need to be unified to the same method. For example, floor installation and wall installation may be mixed. By employing this method, it is easier to secure an installation space when the automatic voltage converter is installed in a narrow place. In the above description, the present invention has been described with respect to the automatic voltage converter. However, the present invention is not limited to only the automatic voltage converter, but is preferably applied to all power converters.

[0050]

According to the power converter of the present invention, the following effects can be obtained by adopting the structure described in the section of the means for solving the above-mentioned problems. By adopting the configuration according to the above-mentioned means (1) and (2) for solving the above problems, each unit device has a housing made of a thin plate material and has substantially the same outer shape. The individual unit devices can be easily fastened to each other, for example, can be unified into a rectangular parallelepiped shape having a floor area of, and the power converter can be easily configured using a plurality of unit devices. In addition, since the external terminal has a connection portion of the external cable only at one end in the longitudinal direction of the terminal plate, the external terminal is compact, and a space for mounting parts of the unit device is reduced. It is possible to make the unit device more compact because it can be used effectively. In addition, by adopting the configuration according to item (3) of the means for solving the above problems, even in the case of a power conversion device for floor installation, the unit device can be installed by rotating it by 180 °. It becomes easy to cope with upper and lower drawing of the external cable while using an external terminal having a connecting portion of the external line only at one end in the longitudinal direction of the terminal board.

[Brief description of the drawings]

FIG. 1 is a perspective view of an automatic voltage converter according to an embodiment of the present invention, as viewed from the upper left toward a front surface.

FIG. 2 is a perspective view of the device shown in FIG.

3A and 3B are perspective views of the voltage conversion unit device shown in FIG. 1, wherein FIG. 3A is a perspective view as viewed from the upper left of the device toward the front, and FIG. 3B is a perspective view of the voltage conversion unit as viewed from the upper right toward the front of the device. Perspective view

FIG. 4 is a perspective view of the voltage conversion unit device shown in FIG.

FIG. 5 is a perspective view of the voltage conversion unit device shown in FIG.

FIG. 6 is a perspective view of the transformer unit device shown in FIG.

FIG. 7 is a perspective view of the transformer unit shown in FIG.

FIG. 8 is a perspective view of the transformer unit device shown in FIG. 6, with a jacket removed.

FIG. 9 is a perspective view of the transformer unit device shown in FIG. 7 with a jacket removed.

FIG. 10 is an explanatory diagram illustrating a state in which the automatic voltage converter illustrated in FIG. 1 is pulled in from below the external cable.

FIG. 11 is an explanatory view showing a state in which an external cable is drawn in according to FIG. 10 except for a front portion of a front cover or a jacket.

FIG. 12 is an explanatory view for explaining a state in which the automatic voltage converter is pulled in from the upper side of the external cable in a slightly changed installation method from FIG. 1;

FIG. 13 is an explanatory view showing a state where the external cable according to FIG. 12 is drawn in, excluding the front part of the front cover or the outer cover;

FIG. 14 is an explanatory diagram for explaining an automatic voltage converter in which the installation method is slightly changed from the automatic voltage converter shown in FIG. 1;

FIG. 15 is a front view showing an automatic voltage converter according to a different embodiment of the present invention.

FIG. 16 is a circuit diagram showing a circuit configuration of a main circuit of a conventional automatic voltage converter.

FIG. 17 is a perspective view of the conventional automatic voltage converter viewed from the upper left side toward the front.

FIG. 18 is a perspective view of the device shown in FIG.

FIG. 19 is a perspective view of the apparatus shown in FIG. 17 with the front cover removed and viewed from the upper left toward the front.

20 is a perspective view of the device shown in FIG. 18 with the front cover removed and viewed from the upper right toward the front.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Power conversion device (automatic voltage conversion device) 3 Voltage conversion unit device 4 Transformer unit device 98 Support base 981 Holding part 982 Screw

Claims (3)

[Claims] 1. A power conversion device comprising: components for power conversion; and a component mounting body having a component mounting portion having a substantially L-shaped cross-sectional shape for mounting the components, the power conversion device being divided into a plurality of groups. A rectangular parallelepiped outer shape having the parts, the part mounting body for mounting the respective parts groups, and a jacket covering four surfaces excluding the part mounting part around the part mounting body. , A plurality of unit devices which are electrically connected to each other by an extension connecting and connecting each other, wherein the component mounting portion of the component mounting body of each unit device has a shape corresponding to the lateral side of the L-shape. .The dimensions are substantially the same, and one of these unit devices
An external terminal for connecting an external line which is an electric wire connecting the power converter and the outside of the power converter is provided on the base, and a conductive material for connecting the external line of the external terminal is provided. A power conversion device, characterized in that each of the terminal plates having an elongated shape made of a metal has an external line connecting portion only at one end in the longitudinal direction of the terminal plate. 2. The power converter according to claim 1,
The component mounting body of the unit device, in which the unit device is disposed adjacent to the portion corresponding to the L-shaped side of the component mounting portion, is a portion corresponding to the L-shaped side of the component mounting portion. A unit device is provided adjacent to a portion of the outer casing facing a portion corresponding to the L-shaped side of the component mounting portion, the unit device having one fixing portion for fixing the unit device adjacent to the component device. The housing of the unit device to be mounted has a part of the housing facing the part corresponding to the L-shaped side of the component mounting part and the other fixing part combined with the one fixing part. A power converter, comprising: 3. The power converter according to claim 1, further comprising a support base on which one or a plurality of the unit devices are mounted, wherein the jacket is a vertical part of the L-shaped part mounting part. And near the part corresponding to the L-shaped side and / or near the part opposite to the part corresponding to the L-shaped side on each side surface sharing the part corresponding to the two sides. A power conversion device, comprising: a support base fixing portion for fixing to the support base.