JP6102704B2 - Motor drive device - Google Patents

Description

  The present invention relates to a power converter including a device main body constituting a power conversion circuit, and a connection terminal for electrically connecting the device main body to an external device, and a fixing structure thereof.

  For example, a power conversion device mounted on a vehicle or the like is known that includes a main body case constituting an outer shell and a device main body housed in the main body case (see Patent Document 1 below). The apparatus main body is composed of a plurality of electronic components, and is connected to, for example, a DC power source and an AC motor. Using the apparatus main body, the DC power of the DC power source is converted into AC power, and the AC motor is driven using the obtained AC power.

  In the main body case, a connection terminal for electrically connecting the apparatus main body to an external device such as the DC power source or the AC load is accommodated. Further, a terminal insertion hole for inserting a terminal (external terminal) of the external device is formed in the main body case. The external terminal is inserted from the terminal insertion hole and fastened to the connection terminal in the main body case. Thereby, it is comprised so that an apparatus main body part and an external apparatus may be electrically connected.

JP 2011-167056 A

  However, when trying to connect the power converter to an external device having a different shape or attachment position of the external terminal, the shape and arrangement position of the connection terminal accommodated in the main body case, and the position of the terminal insertion hole Etc. need to be changed. Therefore, even if there is no change in the apparatus main body, there is a problem that the entire power converter must be redesigned.

  For example, in the case of a power conversion device for a vehicle, when the vehicle type is different, the type of external device to be mounted is different, and the shape of the external terminal is often changed. Therefore, when installing in a new vehicle type, even if there is no change in the apparatus main body, it is necessary to redesign the entire power conversion apparatus. Therefore, the power conversion device is likely to reduce the production amount of one type and increase the production cost.

The present invention has been made in view of such a background, and a motor including a power conversion device that does not need to be changed as a whole even when the shape of an external terminal is different, and an AC motor connected to the power conversion device. A drive device is to be provided.

A first aspect of the present invention is a motor drive device including a power conversion device and an AC motor connected to the power conversion device,
The power converter is
An apparatus main body constituting the power conversion circuit;
A body case for housing the apparatus body,
A terminal case that is formed separately from the main body case and contains a plurality of connection terminals that are electrically connected to the AC motor ;
A cable for electrically connecting the connection terminal and the apparatus main body ,
The terminal case has a placement wall placed on the AC motor,
The AC motor includes a motor case and an external terminal made of a stud bolt that protrudes from the inside to the outside of the motor case.
The case wall, which is the wall of the motor case, and the placement wall are overlapped, and an opening is formed through the overlap portion of the case wall and the placement wall.
The motor drive characterized in that the external terminal is inserted into the opening, the tip of the external terminal is located in the terminal case, and the connection terminal is connected to the external terminal in the terminal case. In the device.

The second aspect of the present invention, the upper SL body case (3) and the terminal case (4) and were formed in the AC motor, not on the same plane two fixing surfaces (71a, 71b) The motor driving device is characterized in that each of the motor driving devices is fixed.

  In the power converter, the connection terminal is accommodated in a terminal case formed separately from the main body case. Therefore, when connecting the power conversion device to an external device having a different shape or the like of the external terminal, only the connection terminal and the terminal case need be replaced, and the main body case and the device main body need not be changed. Therefore, the main body case and the apparatus main body can be generalized, and the manufacturing cost of the power conversion device can be reduced.

Moreover, in the fixing structure of the power converter, the main body case and the terminal case are respectively fixed to two fixing surfaces formed on the external device that do not exist on the same plane.
In this case, it becomes easy to fix the power converter to an external device. That is, if the connection terminal is housed in the main body case as in the conventional case, the main body case is likely to increase in size. Therefore, in order to fix the main body case to the external device, a single wide fixing to the external device is required. It is necessary to form a surface. However, as described above, if the main body case and the terminal case are separated, the main body case does not need to accommodate the connection terminals, and thus the main body case can be reduced in size. Therefore, even when two fixing surfaces having a small area can be separately formed on the external device, the main body case and the terminal case can be fixed to each fixing surface. Therefore, it becomes easy to fix the power converter to an external device.

As described above, according to the present invention, there is provided a motor drive device including a power conversion device that does not need to be changed as a whole even when the shape of the external terminal is different, and an AC motor connected to the power conversion device. can do.

1 is an overall perspective view of a power conversion device in Embodiment 1. FIG. The side view of the fixed power converter device in Example 1. FIG. The top view of the bus-bar module in Example 1. FIG. FIG. 6 is a cross-sectional view of the terminal case according to the first embodiment and is a cross-sectional view taken along the line IV-IV in FIG. 5. VV sectional drawing of FIG. VI-VI sectional drawing of FIG. FIG. 9 is a cross-sectional view of the main body case in the first embodiment, and is a cross-sectional view taken along the line VII-VII in FIG. VIII-VIII sectional drawing of FIG. The circuit diagram of the power converter device in Example 1. FIG. The whole perspective view of the power converter device in Example 2. FIG. The whole perspective view of the power converter device in the reference example 1 . Sectional drawing of the power converter device in the comparative example 1. FIG.

  The power conversion device can be a vehicle-mounted power conversion device to be mounted on a vehicle such as an electric vehicle or a hybrid vehicle.

Example 1
Examples relating to the power converter and its fixing structure will be described with reference to FIGS. As shown in FIG. 1, the power conversion device 1 of this example includes a main body case 3, a terminal case 4, and a cable 6. The main body case 3 accommodates the apparatus main body 2 (see FIG. 7) constituting the power conversion circuit 11. The terminal case 4 is formed separately from the main body case 3. The terminal case 4 accommodates a plurality of connection terminals 5 that are electrically connected to the external device 7 (see FIG. 4). The cable 6 electrically connects the connection terminal 5 and the apparatus main body 2.

  The power conversion device 1 of this example is a vehicle-mounted power conversion device to be mounted on a vehicle such as an electric vehicle or a hybrid vehicle.

  As shown in FIG. 9, the apparatus main body 2 is composed of a plurality of semiconductor modules 20 incorporating semiconductor elements 26 and electronic components such as capacitors 22. The external device 7 of this example includes a DC power source 7a and an AC load 7b. The capacitor 22 is provided to smooth the DC voltage of the DC power source 7a. A control circuit board 25 is connected to the semiconductor module 20. Using this control circuit board 25, the semiconductor module 20 is turned on and off. Thus, the smoothed DC voltage is converted into an AC voltage, and the AC load 7b is driven.

  In this example, a part of the DC power of the DC power source 7 a is supplied to the accessory device 73. The accessory device 73 in this example is an electric air conditioner for a vehicle.

  As shown in FIG. 9, the power conversion device 1 of this example includes a plurality of connection terminals 5 for connecting the device main body 2 to an external device 7 (7a, 7b). The connection terminal 5 includes DC connection terminals 5p, 5n for connecting the apparatus main body 2 to the DC power source 7a, and AC connection terminals 5u, 5v, 5w for connecting the apparatus main body 2 to the AC load 7b. is there. These connection terminals 5 (5p, 5n, 5u, 5v, 5w) are accommodated in the terminal case 4. The terminal case 4 also accommodates accessory terminals 51 (51p, 51n) for electrical connection to the accessory device 73.

  Each of the DC power supply 7a and the AC load 7b includes a terminal (external terminal 70). The external terminals 70p and 70n of the DC power source 7a are connected to the DC connection terminals 5p and 5n, respectively, and the external terminals 70u, 70v and 70w of the AC load 7b are connected to the AC connection terminals 5u, 5v and 5w, respectively. It is configured as follows. Further, the terminal 74 of the accessory device 73 is connected to the accessory terminals 51p and 51n.

  On the other hand, as shown in FIG. 1, the main body case 3 fixes the main body opening 30 (see FIG. 8) for housing the apparatus main body 2, the main body cover 31 that closes the main body opening 30, and the main body case 3. And a main body fixing part 32. The terminal case 4 includes a connection opening 44 (see FIG. 5) for performing operations such as connecting the connection terminal 5 to the external terminal 70, and a connection cover 45 for closing the connection opening 44. A terminal fixing portion 47 for fixing the terminal case 4 and a connector insertion hole 46 for inserting the connector 72 (see FIG. 4) of the accessory device 73 are provided. The connection terminal 5 in the terminal case 4 and the apparatus main body 2 in the main body case 3 are electrically connected by a cable 6 having flexibility.

  As shown in FIG. 4, a bus bar module 8 is accommodated in the terminal case 4. The bus bar module 8 is formed by sealing a plurality of bus bars 50 with a sealing member 80 and integrating them. As shown in FIG. 3, the bus bar 50 includes DC bus bars 50p and 50n for connecting to the DC power source 7a and AC bus bars 50u, 50v and 50w for connecting to the AC load 7b. The connection terminals 5 described above are formed at one end of these bus bars 50. A cable connection terminal 52 for connecting the bus bar 50 to the cable 6 is formed at the other end of each bus bar 50. The DC bus bars 50p and 50n are provided with accessory terminals 51p and 51n for connection to the accessory device 73 (electric air conditioner; see FIG. 9).

  A module fixing hole 81 for bolting the bus bar module 8 into the terminal case 4 is formed through the sealing member 80. Further, through holes 501 for fixing bolts are also formed in the connection terminals 5, the cable connection terminals 52, and the like. The module fixing hole 81 and the through hole 501 penetrate in the opening direction (Z direction) of the connection opening 44 (see FIG. 5). Further, the plurality of bus bars 50 are arranged in a direction (X direction) orthogonal to the Z direction. Each bus bar 50 extends in a direction (Y direction) orthogonal to both the Z direction and the X direction.

  As shown in FIG. 4, the connector 72 and the cable 6 of the accessory device 73 are respectively inserted into the terminal case 4 from the X direction. The cable 6 is formed by bundling a plurality of wires 60 into one. Each wiring 60 is connected to the cable connection terminal 52 of the bus bar 50. The terminal 74 of the connector 72 is fastened to the attached terminals 51p and 51n of the DC bus bars 50p and 50n.

  As shown in FIG. 5, in this example, the terminal case 4 is mounted on the AC load 7b and fixed. An opening 42 is formed in the placement wall 41 of the terminal case 4 so as to open in the Z direction. From the opening 42, the terminal (external terminal 70) of the external device 7 is inserted into the case. The external terminal 70 is a so-called stud bolt. The external terminal 70 and the connection terminal 5 are fastened by a fastening member 48.

  A module fixing column 49 for fixing the bus bar module 8 is formed on the mounting wall 41 of the terminal case 4 so as to protrude in the Z direction. A waterproof seal 43 that is in close contact with the external device 7 (AC load 7b) is disposed on the outer surface of the mounting wall 41. As shown in FIG. 6, the waterproof seal 43 is formed so as to surround the opening 42.

  In this example, the power supply line of the DC power source 7a is drawn into the AC load 7b. As shown in FIG. 6, the external terminal 70 (70u, 70v, 70w) of the AC load 7b is projected from the AC load 7b, and the external terminal 70 (70p, 70n) of the DC power supply 7a is also projected. . Each external terminal 70 is connected to the connection terminal 5.

  In this way, the external terminals 70p and 70n of the DC power source 7a are connected to the DC bus bars 50p and 50n (see FIG. 4), and the DC power lines 7Op and 60n are connected to the DC bus bars 50p and 50n, whereby the DC power source 7a. Is electrically connected to the apparatus main body 2 (see FIG. 7). Further, by fastening the terminal 74 of the connector 72 to the DC bus bars 50p and 50n, a part of the power of the DC power source 7a is supplied to the accessory device 73. Further, by connecting the external terminals 70u, 70v, 70w of the AC load 7b to the AC bus bars 50u, 50v, 50w, and connecting the AC wiring lines 60u, 60v, 60w to the AC bus bars 50u, 50v, 50w, the apparatus main body. It is comprised so that the part 2 and the alternating current load 7b may be electrically connected.

  When the type of vehicle on which the power conversion device 1 is mounted changes, the types of external devices 7 (DC power supply 7a and AC load 7b) and accessory devices 73 change, and the arrangement positions, shapes, pitches, and the like of the external terminals 70 and connectors 72 change. Often changes. On the other hand, the apparatus main body 2 (see FIG. 7) and the main body case 3 may not be changed even if the type of the external device 7 is different. Therefore, in this example, a plurality of types of terminal cases 4 are manufactured in advance, and the terminal case 4 that matches the type of the AC load 7b and the accessory device 73 is selected from these, and this is used for the cable 6. And connected to the apparatus main body 2 (see FIG. 7). Thus, the power conversion device 1 can be mounted on various types of vehicles without changing the device main body 2 and the main body case 3.

  Next, the structure of the apparatus main body 2 and the main body case 3 will be described. As shown in FIGS. 7 and 8, the apparatus main body 2 of this example includes a plurality of semiconductor modules 20, a control circuit board 25 that controls the operation of the semiconductor modules 20, and a smoothing capacitor 22. The semiconductor module 20 includes a main body 27 in which a semiconductor element 26 (see FIG. 9) is sealed, a control terminal 28, and a power terminal 29. The control terminal 28 and the power terminal 29 protrude from the main body 27. The control circuit board 25 is connected to the control terminal 28. As shown in FIG. 8, the power terminal 29 includes a positive terminal 29p and a negative terminal 29n connected to the capacitor 22, and an AC terminal 29c electrically connected to the AC load 7b. By controlling the switching operation of the semiconductor module 20 by the control circuit board 25, the DC voltage applied between the positive terminal 29p and the negative terminal 29n is converted into an AC voltage and output from the AC terminal 29c.

  The positive terminal 29p and the negative terminal 29n are electrically connected to the capacitor 22 by a connecting member 290. The capacitor 22 includes a capacitor element 220, a capacitor case 221 that accommodates the capacitor element 220, and a sealing member 222 that seals the capacitor element 220 in the capacitor case 221. The capacitor bus bars 223 and 224 are connected to the capacitor element 220, and the connection member 290 is connected to the capacitor bus bars 223 and 224.

  As shown in FIG. 7, the DC wirings 60 p and 60 n in the cable 6 are connected to the capacitor bus bars 223 and 224. Further, the AC wirings 60u, 60v, 60w in the cable 6 are connected to the AC terminal 29c (see FIG. 8) of the semiconductor module 20 through connection members (not shown).

  Further, as shown in FIG. 7, in this example, a stacked body 15 is configured by stacking a plurality of semiconductor modules 20 and a cooling pipe 21 that cools the semiconductor modules 20. A pressure member 24 (plate spring) is disposed at a position adjacent to the stacked body 15. Using this pressurizing member, the laminate 15 is pressed toward the side wall portion 33 of the main body case 3. Thereby, the laminated body 15 is fixed in the main body case 3 while ensuring a contact pressure between the semiconductor module 20 and the cooling pipe 21.

  Further, as shown in FIG. 7, two adjacent cooling pipes 21 are connected by a connecting pipe 23. Among the plurality of cooling pipes 21, the cooling pipe 21 a that is located farthest from the pressurizing member 24 includes an introduction pipe 12 for introducing the refrigerant 14 and a lead-out pipe 13 for leading the refrigerant 14. Connected. When the refrigerant 14 is introduced from the introduction pipe 12, the refrigerant 14 flows through all the cooling pipes 21 through the connection pipes 23 and is led out from the lead-out pipe 13. Thereby, the semiconductor module 27 is configured to be cooled.

  Next, the manufacturing method of the power converter device 1 and the attachment method to a vehicle are demonstrated. As described above, in this example, a plurality of types of terminal cases 4 accommodating the connection terminals 5 are manufactured in advance, and the terminal case 4 suitable for the type of vehicle on which the power conversion device 1 is mounted is selected. Then, the connection terminal 5 in the terminal case 4 and the apparatus main body 2 in the main body case 3 are electrically connected using the cable 6. Further, the cable 6 having the optimum length is used according to the vehicle type.

  After manufacturing the power conversion device 1 in this manner, as shown in FIG. 2, the main body case 3 and the terminal case 4 are fixed to the AC load 7b. Two flat fixed surfaces 71 (71a, 71b) are formed on the surface of the AC load 7b. Of the two fixing surfaces 71, the main body case 3 is fixed to one fixing surface 71a, and the terminal case 4 is fixed to the other fixing surface 71b.

  When the terminal case 4 is fixed, the connection cover 45 is removed in advance. As shown in FIG. 5, when the terminal case 4 is placed on the fixed surface 71 b, the external terminal 70 of the external device 7 is inserted from the opening 42 formed in the placement wall 41. Thereafter, the fastening member 48 is inserted into the case from the connection opening 44 and the connection terminal 5 and the external terminal 70 are fastened. Further, the connector 72 of the accessory device 73 is inserted into the connector insertion hole 46 (see FIG. 4) of the terminal case 4 and the terminal 74 is fastened to the accessory terminal 51. After completing these fastening operations, as shown in FIG. 5, the connection cover 45 is attached to the terminal case 4 to close the connection opening 44.

  The effect of this example will be described. As shown in FIG. 1, in the power conversion device 1 of this example, the connection terminal 5 (see FIG. 4) is accommodated in a terminal case 4 formed separately from the main body case 3. Therefore, when connecting the power conversion device 1 to the external device 7 having a different shape or the like of the external terminal 70, only the connection terminal 5 and the terminal case 4 need be replaced. There is no need to change. Therefore, the main body case 3 and the apparatus main body 2 can be generalized, and the manufacturing cost of the power conversion device 1 can be reduced.

  In addition, a plurality of types in which the apparatus main body 2 is accommodated in the main body case 3 can be prepared. And the thing which accommodated the connection terminal 5 in the terminal case 4 may be prepared, and the power converter device 1 can also be manufactured combining these suitably. If it does in this way, the variation of the power converter device 1 can be increased significantly, and the power converter device 1 can be easily adapted to many vehicle types.

Moreover, in this example, the main body case 3 and the terminal case 4 are placed on the external device 7 (AC load 7b). The terminal case 4 includes a placement wall 41 that is placed on the external device 7. An opening 42 (see FIGS. 5 and 6) for inserting the external terminal 70 into the terminal case 4 is formed in the mounting wall 41. The external device 7 (AC load 7b) generates heat during operation.
In this example, since the terminal case 4 is formed separately from the main body case 3, it is not necessary to form the main body case 3 corresponding to the opening 42. Therefore, heat generated from the external device 7 is not easily transmitted into the main body case 3, and it is possible to suppress an increase in the temperature of the device main body 2 in the main body case 3. Therefore, it is possible to prevent the electronic components such as the semiconductor module 20 constituting the apparatus main body 2 from becoming hot and having a reduced life.
Note that the heat generated from the external device 7 is transmitted to the connection terminal 5 through the opening 42 of the terminal case 4, so that the temperature of the connection terminal 5 rises, but this does not cause a major problem. Further, since the heat of the connection terminal 5 is cooled while being transmitted through the cable 6, the amount of heat transmitted from the connection terminal 5 to the apparatus main body 2 is small.

In addition, as described above, in this example, since it is not necessary to form the main body case 3 corresponding to the opening 42 (see FIGS. 5 and 6), the waterproofness of the main body case 3 can be improved. Therefore, it is possible to suppress a problem that water enters the main body case 3 from the outside and the electronic components such as the semiconductor module 20 constituting the apparatus main body 2 are exposed to water.
Further, if the main body case 3 and the terminal case 4 are separated as in this example, the area of the opening 42 can be reduced, so that the reliability of the waterproof seal 43 can be greatly improved.

As shown in FIG. 2, in the fixing structure 10 for the power conversion device in this example, the main body case 3 and the terminal case 4 are formed on the external device 7, and the two fixing surfaces 71 a, which do not exist on the same plane. Each of them is fixed to 71b.
Therefore, it becomes easy to fix the power converter 1 to the external device 7. That is, if the connection terminal 5 is housed in the main body case 3 as in the prior art, the main body case 3 is likely to be enlarged. It is necessary to form a single wide fixing surface 71. However, as described above, if the main body case 3 and the terminal case 4 are separated, the main body case 3 does not need to accommodate the connection terminals 5, and thus the main body case 3 can be reduced in size. Therefore, even when the two fixing surfaces 71 (71a, 71b) having a small area can be separately formed on the external device 7, the main body case 3 and the terminal case 4 can be fixed to the respective fixing surfaces 71. . Therefore, it becomes easy to fix the power converter 1 to the external device 7.

  Further, even when the external device 7 (AC load 7b) is driven and vibration is generated, in this example, a big problem is unlikely to occur. That is, as shown in FIG. 2, when the main body case 3 and the terminal case 4 are fixed to different fixing surfaces 71a and 71b on the external device 7, respectively, the direction of the vibration V1 transmitted from the external device 7 to the main body case 3, and The direction of the vibration V2 transmitted to the terminal case 4 may be different from each other. However, in this example, since the cable 6 that connects the main body case 3 and the terminal case 4 is flexible, the difference between the two vibrations V1 and V2 can be absorbed by the cable 6. Therefore, problems such as stress applied to the base of the cable 6 due to the difference in the directions of the vibrations V1 and V2 do not occur.

In this example, as shown in FIG. 5, the operation of connecting the external terminal 70 and the connection terminal 5 is performed from the Z direction. Further, as shown in FIG. 2, the length L2 of the terminal case 4 in the Z direction is shorter than the length L1 of the main body case 3 in the Z direction.
Therefore, it is possible to suppress the generation of a useless space in the main body case 3, and the main body case 3 can be easily downsized. That is, in this example, the external terminal 70 (see FIG. 5) and the connection terminal 5 can be connected at a position relatively close to the external device 7 in the Z direction. Therefore, as shown in FIG. 12, if the structure inside the terminal case 4 is arranged in the main body case 93, the length L1 of the main body case 93 in the Z direction is long, so that the gap between the connection terminal 95 and the main body cover 931 is long. A useless space S is formed. Therefore, the main body case 93 is easily increased in size. However, if the connection terminal 5 (see FIG. 5) is accommodated in the terminal case 4, the connection terminal 5 is not provided in the main body case 3 and a useless space S is not formed. Can be reduced in size.

  As described above, according to the present example, it is possible to provide a power conversion device that does not need to be changed as a whole and a fixing structure thereof even when connected to external devices having different external terminal shapes and the like.

(Example 2)
In the following embodiments, the same reference numerals used in the drawings among the reference numerals used in the drawings represent the same components as in the first embodiment unless otherwise specified.

  In this example, only a part of the connection terminals 5 among the plurality of connection terminals 5 is accommodated in the terminal case 4. As shown in FIG. 10, the power conversion device 1 of this example includes AC connection terminals 5u, 5v, 5w and DC connection terminals 5p, 5n. Among these connection terminals 5, AC connection terminals 5 u, 5 v, 5 w are accommodated in the terminal case 4, and DC connection terminals 5 p, 5 n are accommodated in the main body case 3.

  The terminal case 4 and the main body case 3 are fixed on the AC load 7b as in the first embodiment. The AC connection terminals 5u, 5v, 5w in the terminal case 4 are connected to external terminals 70u, 70v, 70w (see FIG. 6) protruding from the AC load 7b. A DC connector 18 is inserted into the main body case 3. The DC connection terminals 5p and 5n in the main body case 3 are configured to be connected to the DC connector 18.

In this example, for example, with the change of the vehicle type on which the power conversion device 1 is mounted, only the shape and the like of the terminals (external terminals 70u, 70v, 70w) of the AC load 7b are changed. This is effective when the shape or the like of the terminals (external terminals 70p, 70n) is not changed. In this case, since only the AC connection terminals 5u, 5v, and 5w have to be accommodated in the terminal case 4, the terminal case 4 can be easily downsized.
In addition, the configuration and operational effects are the same as those of the first embodiment.

( Reference Example 1 )
In this example, only a part of the connection terminals 5 among the plurality of connection terminals 5 is accommodated in the terminal case 4. As shown in FIG. 11, the power conversion device 1 of this example includes AC connection terminals 5u, 5v, and 5w and DC connection terminals 5p and 5n. Among these connection terminals 5, DC connection terminals 5 p and 5 n are accommodated in the terminal case 4, and AC connection terminals 5 u, 5 v and 5 w are accommodated in the main body case 3.

  In this example, external terminals 70p and 70n (see FIG. 6) of the DC power supply 7a are inserted into the terminal case 4 and connected to the DC connection terminals 5p and 5n. An AC connector 19 is inserted into the main body case 3. The AC connector 19 is configured to be connected to AC connection terminals 5u, 5v, 5w in the main body case 3.

If it carries out like this example, with the change of the vehicle model which mounts the power converter device 1, only the shape of the terminal (external terminal 70p, 70n) etc. of DC power supply 7a will be changed, and the terminal ( This is effective when the shape or the like of the external terminals 70u, 70v, 70w) is not changed. In this case, since it is sufficient to accommodate only the DC connection terminals 5p and 5n in the terminal case 4, the terminal case 4 can be easily miniaturized.
In addition, the configuration and operational effects are the same as those of the first embodiment.

DESCRIPTION OF SYMBOLS 1 Power converter 10 Fixed structure 11 Power converter circuit 2 Apparatus main-body part 3 Main body case 4 Terminal case 5 Connection terminal 6 Cable

Claims (2)

A motor drive device comprising a power converter (1) and an AC motor connected to the power converter (1),
The power converter (1)
An apparatus main body (2) constituting the power conversion circuit (11);
A body case (3) for housing the apparatus body (2);
A terminal case (4) which is formed separately from the main body case (3) and which accommodates a plurality of connection terminals (5) electrically connected to the AC motor ;
A cable (6) for electrically connecting the connection terminal (5) and the apparatus body (2) ;
The terminal case (4) has a placement wall (41) placed on the AC motor,
The AC motor includes a motor case and an external terminal (70) made of a stud bolt that protrudes from the inside to the outside of the motor case.
The case wall, which is the wall portion of the motor case, and the placement wall (41) are overlapped, and an opening is formed through the overlap portion of the case wall and the placement wall (41). And
The external terminal is inserted into the opening, and a tip thereof is located in the terminal case (4). In the terminal case (4), the connection terminal (5) is connected to the external terminal (70). The motor drive device characterized by being connected to . An upper Symbol main body case (3) and the terminal case (4), characterized in that formed on the AC motor, two fixed surfaces that do not exist on the same plane (71a, 71b) are respectively fixed to The motor drive device according to claim 1.

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