JP2009071099A - Capacitor unit and motor control apparatus equipped with the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a capacitor unit capable of positioning an electrolytic capacitor easily and surely, and fixing and holding it stably, when the electrolytic capacitor with the radial direction size of a sealing part different from that of a capacitor body is stacked in a plurality of steps in a case, and a motor control apparatus equipped with the same. <P>SOLUTION: In the capacitor unit where the capacitor body and a pillar-shaped electrolytic capacitor with a terminal and a sealing part arranged at the end of the pillar axial direction of the capacitor body are stacked in a plurality of steps in the case, the case comprises a lower case, an upper case that forms a space combined with the lower case, and at least one intermediate case component arranged in the space so that the space may be divided in a vertical direction into a plurality of steps. In the intermediate case component, ribs are arranged in a direction that intersects perpendicularly with the pillar axial direction of the electrolytic capacitor. In the space divided into the plurality of steps by the intermediate case component, a plurality of electrolytic capacitors are arranged. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a capacitor unit for holding an electrolytic capacitor and a motor control device including the capacitor unit.

As shown in FIG. 5, conventionally, in the motor control device 21, the capacitor unit 22 is housed inside (for example, see Patent Document 1).
As shown in FIG. 6, the capacitor unit 22 includes capacitor bodies 23a, 24a, 25a, and 26a (hereinafter referred to as 23a to 26a) and sealing portions 23b, 24b, 25b, and 26b (hereinafter referred to as 23b to 26b). For example, four columnar electrolytic capacitors 23, 24, 25, and 26 (hereinafter referred to as 23 to 26) are fixed in a space 27a of the case 27.
The case 27 has a substantially flat plate-like lower case 28 having a flat surface portion 28a for sandwiching and holding and positioning the lower electrolytic capacitors 23, 24, and a flat surface portion 30a, and both ends thereof are bent. Three sheet metal cases, a substantially U-shaped middle case 30 formed with a portion 30b, a substantially U-shaped upper case 29 bent at both ends, and a support attached to the middle case 30 and the upper case 29 A plate 31 and fixing screws 32 and 33 for fixing them are provided.
The lower case 28 has a protruding edge 28b at the end on the side opposite to the support plate and a screw hole 28c at the side, and the middle case 30 has an end on the side opposite the support plate. A protruding edge 30c is formed.
Further, the upper case 29 is provided with a support plate mounting piece 29b, a screw hole 29c, and a screw through long hole 29d on the side portion 29a. The middle case 30 is also provided with a support plate mounting piece 30d, a screw hole 30e, and a screw-through long hole 30f on the side portion 30b.
Further, the support plate 31 is formed with a positioning hole 31a and a screw-through hole 31b which serve both as terminal ports and positioning for the electrolytic capacitors 23 to 26.

When holding the four electrolytic capacitors 23 to 26 using the capacitor unit 22, it is performed as follows.
First, the two electrolytic capacitors 23 and 24 are placed side by side on the lower case 28.
Next, the middle case 30 is covered so that the electrolytic capacitors 23 and 24 are sandwiched between the lower case 28.
Next, two electrolytic capacitors 25 and 26 are placed side by side on the middle case 30.
Next, the upper case 29 is covered so that the electrolytic capacitors 25 and 26 are sandwiched between the middle case 25.
Next, the middle case 30 and the upper case 29 are joined together, and the fixing screw 32 is temporarily tightened to temporarily fix the middle case 30 and the upper case 29 together to the lower case 24.
Next, the support plate 31 is inserted with the terminals of the four electrolytic capacitors 23 to 26 into the positioning holes of the support plate 31, and fixing screws 33 are used for the middle case 30 and the upper case 29. Temporarily fix.
Next, the middle case 30, the upper case 29, and the support plate 31 are moved to adjust the positions of the electrolytic capacitors 23 to 26. As soon as the adjustment is completed, the temporarily tightened fixing screws 32 and 33 are installed. Tighten.
Accordingly, the four electrolytic capacitors 23 to 26 are fixed and held on the capacitor unit 22.
JP 2005-330441 A

However, such conventional techniques have the following problems.
(1) As for the said electrolytic capacitors 23-26, the magnitude | size of the direction (radial direction) orthogonal to a column axis is larger in the said sealing part than the said capacitor bodies 23a-26a. That is, there is a step. Therefore, when the electrolytic capacitors 23 to 26 are stacked and installed as they are, an unstable state is obtained. Therefore, ribs 30b are formed on the flat portion 30a of the middle case 30 to absorb the gaps, so that the electrolytic capacitors 23 to 26 can be stably installed. However, since the rib 30b is formed in the column axis direction of the electrolytic capacitors 23 to 26, when attempting to fix the plurality of electrolytic capacitors 23 to 26, the electrolytic capacitors 23 to 26 are positioned at the end portions of the rib 30b. 26 is inclined and the terminal position is shifted, so that the attachment is not successful.
(2) Since it is necessary to fix the electrolytic capacitors 23 to 26 and the upper case 27 and the middle case 30 at the same time, adjustment is very difficult, and it is difficult to simply and reliably fix the capacitors.
(3) The upper case 29 having substantially the same shape as the middle case 30 needs to be fastened together with the middle case 30, and in order to avoid interference with the middle case 30, the side portion 29 a has a complicated step bend. Processing is required.
The present invention has been made in order to solve such problems, and it is easy and reliable to stack electrolytic capacitors having different sizes in the radial direction of the capacitor body and the sealing portion in a plurality of stages in the case. It is an object of the present invention to provide a capacitor unit that can be positioned, fixed and held stably, and a motor control device including the capacitor unit.

In order to solve the above problems, the present invention is configured as follows.
The invention of the capacitor unit according to claim 1, wherein a columnar electrolytic capacitor having a capacitor main body and a terminal portion and a sealing portion provided at a tip end portion of the capacitor main body in a column axis direction is stacked in a plurality of stages in a case. In the capacitor unit, the case includes a lower case, an upper case that forms a space in combination with the lower case, and at least one intermediate disposed in the space so as to partition the space into a plurality of stages in the vertical direction. The intermediate case member is provided with ribs in a direction perpendicular to the column axis direction of the electrolytic capacitor, and a plurality of spaces partitioned by the intermediate case member are provided in a plurality of stages. An electrolytic capacitor is arranged.

  According to a second aspect of the present invention, the lower case is formed in a substantially flat plate shape having a flat surface portion on which only the main body portion of the electrolytic capacitor is placed, and the upper case covers at least a part of the lower case. It is formed in a U-shape.

  According to a third aspect of the present invention, the upper case is provided with a threaded elongated hole in the column axis direction of the electrolytic capacitor at the lower portion of the side portion, and the lower case corresponds to the threaded elongated hole. A screw hole is provided at a position to be fixed, and the upper case is fixed to the lower case with a screw so that the position can be adjusted in the column axis direction of the electrolytic capacitor.

  The invention according to claim 4 is characterized in that the intermediate case member is attached to a side portion of the upper case.

  According to a fifth aspect of the present invention, the intermediate case member has engagement protrusions at both ends in a direction orthogonal to the column axis direction of the electrolytic capacitor, and the engagement is formed on both sides of the upper case. An engagement hole corresponding to the protrusion is provided, and the engagement protrusion of the intermediate case member is engaged with the engagement hole of the upper case.

  The invention described in claim 6 is characterized in that a support plate made of an insulating material for positioning the electrolytic capacitor is attached to an end portion of the upper case corresponding to the terminal portion side of the electrolytic capacitor.

  The invention according to claim 7 is characterized in that the support plate is provided with a positioning hole for inserting and positioning the terminal portion of the electrolytic capacitor.

  The invention according to claim 8 is the column axial direction of the electrolytic capacitor in contact with the end surface of the lower case and the intermediate case member on the opposite terminal portion side of the electrolytic capacitor in contact with the end surface on the opposite terminal portion side of the electrolytic capacitor A protruding edge for positioning is provided.

  The invention according to claim 9 is characterized in that the intermediate case member is made of a metal plate, and the protruding edge is formed by bending the metal plate.

  The invention according to claim 10 is characterized in that the protruding edge is formed by integrating the portions in contact with the ends of the plurality of electrolytic capacitors.

  The motor control device according to an eleventh aspect of the present invention is the motor control device including a capacitor unit therein, wherein the capacitor unit is configured by the capacitor unit according to any one of the first to tenth aspects. It is characterized by that.

The present invention has the following effects.
According to the first and second aspects of the capacitor unit of the present invention, the case is divided into a lower case, an upper case that forms a space in combination with the lower case, and the space in a plurality of stages in the vertical direction. And at least one intermediate case member arranged in the space, and the intermediate case member is provided with ribs in a direction perpendicular to the column axis direction of the electrolytic capacitor. When being fixed and held inside, it can be easily set in a correct posture, and the posture can be stably maintained.

  According to the third aspect of the present invention, since the hole through which the screw is passed is a long hole in fixing the screw to the upper case 3 and the lower case, it is possible to adjust the position when the upper case is attached to the lower case. Thus, it can be used for an electrolytic capacitor having a large tolerance in the column axis direction. Furthermore, it is possible to cope with an electrolytic capacitor having the same outer shape and a long length in the column axis direction by changing only the intermediate case member 10 and the lower case 8, and the components can be shared.

According to the invention described in claim 4 and claim 5, when attaching the intermediate case member to the upper case, a fixing member such as a screw is not required, and simple and reliable assembly is possible. Since only the upper case needs to be attached to the lower case, attachment to the lower case of the upper case becomes easy.
Further, since the upper case, the intermediate case member, and the upper electrolytic capacitor can be combined as one unit, management is easy and the assembly of the lower case and the lower electrolytic capacitor is facilitated.

  According to the invention described in claims 6, 8, 9, and 10, the electrolytic capacitor 3 to 6 can be easily positioned in the column axis direction only by contacting the end surface of the electrolytic capacitor 3 to 6 on the opposite terminal side to the protruding edge. Can be done.

  According to the seventh aspect of the present invention, the electrolytic capacitor can be easily positioned in a direction perpendicular to the column axis direction of the electrolytic capacitor simply by fitting the terminal portion of the electrolytic capacitor into the positioning hole of the support plate. Can be done.

  According to the motor control device of the present invention, when the electrolytic capacitor is housed and fixed in the case, the electrolytic capacitor can be easily put into a correct posture and the posture can be stably maintained. Capacitor units that can do this can be provided inside.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a front view showing a motor control device according to an embodiment of the present invention. FIG. 2 is a perspective view showing the capacitor unit in the embodiment of the present invention. FIG. 3 is an exploded perspective view of FIG. The embodiment shown in FIGS. 2 and 3 is the case of an electrolytic capacitor as a smoothing circuit provided on the input side of the switching main circuit of the power semiconductor element with four capacitors.

As shown in FIG. 1, the motor control device 1 houses a capacitor unit 2 therein. As shown in FIGS. 2 and 3, the capacitor unit 2 includes a plurality of, for example, four columnar electrolytic capacitors 3, 4, 5, 6 (hereinafter referred to as electrolytic capacitors 3-6) in a plurality of stages. For example, in this embodiment, it has a case 7 for storing two stacked in two. The electrolytic capacitors 3 to 6 include capacitor bodies 3a, 4a, 5a and 6a (hereinafter referred to as capacitor bodies 3a to 6a) and sealing portions 3b, 4b, 5b and 6b (hereinafter referred to as sealing portions 3b to 6b). And terminal portions 3c, 4c, 5c, and 6c (hereinafter, referred to as terminal portions 3c to 6c).
The case 7 includes a lower case 8, an upper case 9, an intermediate case member 10, and a support plate 11, and has a space 7a therein.

The lower case 8 serves as a base, and is formed in a substantially flat plate shape having a flat portion 8a on which only the capacitor main bodies 3a and 4a of the electrolytic capacitors 3 and 4 are placed. Further, the lower case 8 is in contact with the end surfaces 3d and 4d on the opposite terminal portion side of the electrolytic capacitor at the end corresponding to the opposite terminal portion side of the electrolytic capacitors 3 and 4, and the column axial direction of the electrolytic capacitors 3 and 4 Is provided with a protruding edge 8b. Furthermore, screw holes 8c are provided on both sides.
A fixing screw 12 for tightening and fixing the upper case 9 to the lower case 8 is screwed into the screw hole 8c.
As for the electrolytic capacitors 3 to 6, the size of the capacitor main bodies 3a to 6a and the sealing portions 3b to 6b in the direction (radial direction) perpendicular to the column axis is the direction of the sealing portions 3b to 6b as described above. Is larger than the capacitor main bodies 3a to 6a. Therefore, in the lower case 8, the capacitor main bodies 3a, 4a and the sealing portions 3b, 4b are not placed on the same plane portion 8a. Only the capacitor main bodies 3a and 4a are placed on the flat surface portion 8a. The sealing portions 3b and 4b are placed off the flat portion 8a of the lower case 8.

  The upper case 9 is combined with the lower case 8 to form the space 7a, and is formed in a U shape that covers at least a part of the lower case 8. The upper case 9 is provided with an engagement hole 9b for attaching the intermediate case member 10 to the side portion 9a, and a threaded long hole 9c for attaching the upper case 9 to the lower case 8. . Further, a support plate mounting piece 9d for mounting the support plate 11 is provided at the end of the upper case 9 corresponding to the terminal portion side of the electrolytic capacitors 3-6. The support plate mounting piece 9d is provided with a screw hole 9e for screwing with a fixing screw 13 for fastening the support plate 11 to the support plate mounting piece 9d.

  The support plate 11 is for positioning the electrolytic capacitors 3 to 6 and is made of an insulating material. The support plate 11 is provided with positioning holes 11a for inserting and positioning the terminal portions 3c to 6c of the electrolytic capacitors 3 to 6. Yes. A screw hole 11b through which the fixing screw 13 is passed is provided.

The intermediate case member 10 is formed in a substantially flat plate shape having a flat portion 10a on which only the main body portions of the upper electrolytic capacitors 5 and 6 are placed, and is attached to the inner surface of the side portion 9a of the upper case 9. . The intermediate case member 10 has engagement protrusions 10 c at both ends in a direction orthogonal to the column axis direction of the electrolytic capacitors 5 and 6, and the engagement protrusions 10 c are provided on the upper case 9. The intermediate case member 10 is attached to the upper case 8 by engaging with the hole 9b.
Further, considering the steps between the sealing portions 3b to 6b of the electrolytic capacitors 3 to 6 and the capacitor bodies 3a to 6a, the sealing portions 3b and 4b of the lower electrolytic capacitors 3 and 4 and the upper electrolytic capacitors 5 and 6 are used. The intermediate case member 10 is provided with ribs 10b in a direction perpendicular to the column axis directions of the electrolytic capacitors 5 and 6 so that the sealing portions 5b and 6b do not interfere with each other. Thereby, the space | interval of the capacitor | condenser main bodies 3a and 4a of the said electrolytic capacitors 3 and 4 and the capacitor | condenser main bodies 5a and 6a of the said electrolytic capacitors 5 and 6 spreads, and the sealing parts 3b and 4b of the said electrolytic capacitors 3 and 4 of the lower side are expanded. Without interfering with the sealing portions 5b, 6b of the upper electrolytic capacitors 5, 6 between the capacitor bodies 3a, 4a of the electrolytic capacitors 3, 4 and the capacitor bodies 5a, 6a of the electrolytic capacitors 5, 6 The intermediate case member 10 can be fixed in close contact with the flat surface portion 10a (in FIG. 4 (b), a gap is drawn between the electrolytic capacitor and the intermediate case member for easy understanding). Further, by providing the rib 10b perpendicular to the column axis direction of the electrolytic capacitors 5 and 6, the strength of the intermediate case member 10 can be increased, and the thickness of the intermediate case member 10 can be reduced. Thereby, material can be saved and cost can be reduced.
The intermediate case member 10 is in contact with the end surfaces 5d and 6d on the opposite terminal side of the electrolytic capacitor at the end corresponding to the opposite terminal portion side of the electrolytic capacitors 5 and 6, and the columns of the electrolytic capacitors 5 and 6 A protruding edge 10d for positioning in the axial direction is provided.
In addition, at least one intermediate case member 10 is disposed in the space 7a, and the space 7a is divided into a plurality of stages in the vertical direction, and in this embodiment, two stages.

In such a configuration, the electrolytic units 3 to 6 are fixed and held in the case 7 in the capacitor unit 2 as follows.
First, the two lower electrolytic capacitors 3 and 4 are placed on the flat portion 8 a of the lower case 8. At that time, the electrolytic capacitors 3 and 4 are arranged so that the end surfaces of the electrolytic capacitors 3 and 4 are in contact with the protruding edge 8b provided on the lower case 8.
Next, the electrolytic capacitors 5 and 6 are put into the upper case 9 and the upper case 9 is pressed from the lower side so that the intermediate case member 10 is pressed against the surfaces of the capacitor main bodies 5a and 6a of the electrolytic capacitors 5 and 6. Put in. The intermediate case member 10 placed in the upper case 9 is fixed to the upper case 9 by engaging both engaging protrusions 10 c with the engaging holes 9 b of the upper case 9. At that time, the electrolytic capacitors 5 and 6 are arranged so that the end faces 5 d and 6 d abut against the protruding edge 10 d of the intermediate case member 10.
Next, the upper case 8 integrated with the electrolytic capacitors 5 and 6 by the intermediate case member 10 is replaced with the two lower electrolytic capacitors 3 disposed on the flat portion 8a of the lower case 8 prepared previously. The upper case 9 is covered with the lower case 8 so that the capacitor body 3a, 4a of the fourth capacitor 4 is covered and pressed by the lower surface of the rib 10b of the intermediate case member 10. Thereafter, the fixing screw 12 is passed through the threaded long hole 9 c of the upper case 9 and screwed into the screw hole 8 c of the lower case 8, and the upper case 9 is fastened and fixed to the lower case 8.
Next, the support plate 11 is attached to the upper case 9, and the electrolytic capacitors 3 to 6 are stably fixed in the column axis direction. This is done as follows. First, the support plate 11 is brought into contact with the support plate mounting piece 9d of the upper case 8 while fitting the positioning holes 11a of the support plate 11 to the terminal portions 3c to 6c of the electrolytic capacitors 3 to 6. Next, the position of the screw through hole 11 b of the support plate 11 is matched with the position of the screw hole 9 e of the support plate mounting piece 9 d of the upper case 9. When the position of the screw through hole 11b matches the position of the screw hole 9e, the fixing screw 13 is passed through the screw through hole 11b and screwed into the screw hole 9e, and the support plate 11 is fastened and fixed to the upper case 9.
Thereby, the electrolytic capacitors 3 to 6 are fixed to and held in the case 7.

The capacitor unit 2 housed in the motor control device 1 has such a configuration and has the following operations and effects.
(1) In the capacitor unit 2, ribs 10b are formed on the intermediate case member 10 so as to be orthogonal to the column axis directions of the electrolytic capacitors 3 to 6, and the outer shapes of the sealing portions 3b to 6b and the capacitor bodies 3a to 6a In the case where the electrolytic capacitors having different sizes are installed in an overlapping manner, the electrolytic capacitors 3 to 6 can be stably fixed and held by the action of the rib 10b. The rib 10b increases the distance between the capacitor main bodies 3a and 4a of the electrolytic capacitors 3 and 4 and the capacitor main bodies 5a and 6a of the electrolytic capacitors 5 and 6, and the sealing portion 3b of the lower electrolytic capacitors 3 and 4 is provided. , 4b and the sealing portions 5b, 6b of the upper electrolytic capacitors 5, 6 do not interfere with each other, and the capacitor bodies 3a, 4a of the electrolytic capacitors 3, 4 and the capacitor bodies 5a, 6a of the electrolytic capacitors 5, 6 Can be brought into close contact with the flat surface portion 10a of the intermediate case member 10 for stable fixation.

(2) When fixing screws to the upper case 9 and the lower case 8, the holes through which the screws pass are long holes, so the position of the upper case 9 when it is attached to the lower case 8 can be adjusted, and the column axis direction It can also be used for electrolytic capacitors with large tolerances. Furthermore, it is possible to cope with an electrolytic capacitor having the same outer shape and a long length in the column axis direction by changing only the intermediate case member 10 and the lower case 8, and the components can be shared.

(3) When attaching the intermediate case member 10 to the upper case 9, a fixing member such as a screw is not required, and simple and reliable assembly is possible. In addition, only the upper case 9 is attached to the lower case 8. Since attachment is sufficient, attachment to the lower case 8 of the upper case 9 becomes easy.
Further, since the upper case 9, the intermediate case member 10, and the upper electrolytic capacitors 5 and 6 can be combined as one unit, it is easy to manage and the lower case 8 and the lower electrolytic capacitors 3 and 4 Assembling becomes easy.

(4) The electrolytic capacitor can be easily positioned in the column axis direction simply by bringing the end face of the electrolytic capacitor 3 to 6 on the side opposite to the terminal portion into contact with the protruding edge.

(5) Easy positioning of the electrolytic capacitors 3 to 6 in a direction perpendicular to the column axis direction of the electrolytic capacitors 3 to 6 simply by fitting the terminal portions of the electrolytic capacitors to the positioning holes 11a of the support plate 11 Can be done.

(6) When the electrolytic capacitors 3 to 6 are fixed and held in the case 7, the electrolytic capacitors 3 to 6 can be easily placed in a correct posture, and the posture can be stably maintained. The unit 2 can be provided inside.

The above embodiment is an example in which two electrolytic capacitors are stacked in two stages, but if the outer shape of the upper case, the intermediate case member, the lower case, and the support plate is changed, four electrolytic capacitors are provided. Not only the case product but also the case where the number of electrolytic capacitors is more than 4 or more than 4 and can be dealt with, and can be fixed and held stably.
The columnar electrolytic capacitor can be used not only in an oval shape as shown in FIG. 2 but also in a circular or square shape.
Further, a space is formed between a surface of the upper case, the intermediate case member, and the lower case that contacts the electrolytic capacitor and an outer surface of the electrolytic capacitor, and a pressing member that presses the capacitor is disposed in the space. You may do it. In this case, the fixing and holding of the electrolytic capacitor is strong against vibrations and is performed more firmly.

It is a front view which shows the motor control apparatus in the Example of this invention. It is a perspective view which shows the capacitor | condenser unit in the Example of this invention. FIG. 3 is an exploded perspective view of FIG. 2. It is a figure which shows the relationship between the electrolytic capacitor and intermediate | middle case member in the Example of this invention, (a) is a front view of the principal part, (b) is a side view of the principal part. It is a front view which shows the motor control apparatus in a prior art. It is a disassembled perspective view which shows the capacitor | condenser unit in a prior art. It is a figure which shows the relationship between the electrolytic capacitor and middle case in a prior art, (a) is a front view of the principal part, (b) is a side view of the principal part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Motor control apparatus 2 Capacitor unit 3, 4, 5, 6 Electrolytic capacitor 3a, 4a, 5a, 6a Capacitor main body 3b, 4b, 5b, 6b Sealing part 3c, 4c, 5c, 6c Terminal part 3d, 4d, 5d, 6d End surface 7 Case 7a Space 8 Lower case 8a Plane portion 8b Projection edge 8c Screw hole 9 Upper case 9a Side portion 9b Engagement hole 9c Screw through long hole 9d Support plate mounting piece 9e Screw hole 10 Intermediate case member 10a Plane portion 10b Rib 10c Engaging protrusion 10d Protruding edge 11 Support plate 11a Positioning hole 11b Screw through hole 12, 13 Fixing screw 21 Motor controller 22 Capacitor units 23, 24, 25, 26 Electrolytic capacitors 23a, 24a, 25a, 26a Capacitor bodies 23b, 24b , 25b, 26b Sealing portions 23c, 24c, 25c, 26c Terminal portions 23d, 24d, 25d, 26d End face 27 Case 27a Space 28 Lower case 28a Flat portion 28b Projection edge 28c Screw hole 29 Upper case 29a Side portion 29b Support plate mounting piece 29c Screw hole 29d Screw through slot 30 Middle case 30a Flat portion 30b Rib 30c Side portion 30d Projecting edge 30e Threaded elongated hole 31 Support plate 31a Positioning hole 31b Threaded holes 32, 33 Fixing screw

Claims (11)

In a capacitor unit formed by stacking a capacitor body and a columnar electrolytic capacitor having a terminal portion and a sealing portion provided at a tip portion in the column axis direction of the capacitor body in a plurality of stages in a case,
The case includes a lower case, an upper case that forms a space in combination with the lower case, and at least one intermediate case member that is disposed in the space so as to partition the space into a plurality of stages in the vertical direction. Configure
The intermediate case member is provided with ribs in a direction perpendicular to the column axis direction of the electrolytic capacitor,
A capacitor unit, wherein a plurality of electrolytic capacitors are arranged in a plurality of spaces partitioned by the intermediate case member. The lower case is formed in a substantially flat plate shape having a flat portion on which only the main body portion of the electrolytic capacitor is placed,
The capacitor unit according to claim 1, wherein the upper case is formed in a U shape covering at least a part of the lower case.   The upper case is provided with a screw-through elongated hole in the column axis direction of the electrolytic capacitor at the lower portion of the side portion, and the lower case is provided with a screw hole at a position corresponding to the screw-through elongated hole, The capacitor unit according to claim 1 or 2, wherein the upper case is fixed to the lower case with screws so that the position of the upper case can be adjusted in the column axis direction of the electrolytic capacitor.   The capacitor unit according to claim 2, wherein the intermediate case member is attached to a side portion of the upper case.   The intermediate case member has engagement protrusions at both ends in a direction orthogonal to the column axis direction of the electrolytic capacitor, and engagement holes corresponding to the engagement protrusions are provided on both sides of the upper case. The capacitor unit according to claim 4, wherein an engagement protrusion of the intermediate case member is engaged with an engagement hole of the upper case.   2. The capacitor unit according to claim 1, wherein a support plate made of an insulating material for positioning the electrolytic capacitor is attached to an end of the upper case corresponding to a terminal portion side of the electrolytic capacitor.   The capacitor unit according to claim 6, wherein the support plate is provided with a positioning hole for inserting and positioning a terminal portion of the electrolytic capacitor.   Protruding edges for positioning the electrolytic capacitor in the column axis direction are provided on the end portions of the lower case and the intermediate case member, which are on the opposite terminal portion side of the electrolytic capacitor, in contact with the end surface on the opposite terminal portion side of the electrolytic capacitor. The capacitor unit according to claim 1.   The capacitor unit according to claim 8, wherein the intermediate case member is made of a metal plate, and the protruding edge is formed by bending the metal plate.   The capacitor unit according to claim 8, wherein the protruding edge is formed by integrating portions in contact with ends of a plurality of electrolytic capacitors. In a motor control device with a capacitor unit inside,
A motor control device comprising the capacitor unit according to any one of claims 1 to 10.

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