JP2012191766A - Power conversion device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power conversion device that stably holds connections of substrate side connectors and component side connectors and facilitates the assembly and disassembly of the connections.SOLUTION: A power conversion device 1 houses in a case 6 constituent electronic components 12, cooling means, a control circuit board 15 and a terminal block 2. The constituent electronic components 12, cooling means, control circuit board 15 and terminal block 2 are fixed to a frame 5 to constitute an internal unit 10, which is fixed in the case 6. The control circuit board 15 and the terminal block 2 are arranged on opposite sides of the frame 5. The control circuit board 15 and auxiliary electronic components 22 are connected by substrate side conductive wires 31 and component side conductive wires 23. Connections 45 connecting substrate side connectors 32 and component side connectors 24 are fixed to the frame 5.

Description

  The present invention relates to a power conversion device in which a plurality of electronic components constituting a power conversion circuit and a cooler for cooling at least some of the electronic components are accommodated in a case.

  For example, an electric vehicle, a hybrid vehicle, or the like is equipped with a power conversion device 9 such as an inverter or a converter for converting power from electric power into driving power for driving a driving motor. As shown in FIG. 10, the power conversion device 9 includes a power conversion circuit and a control circuit board 96 on which a control circuit for controlling the power conversion circuit is formed (see Patent Document 1). The power conversion circuit includes various electronic components such as a semiconductor module 921 and a capacitor 922. In addition, in order to suppress the temperature rise of the semiconductor module 921, a cooler is disposed in contact between the plurality of semiconductor modules 921 to form a stacked body 94 in which the semiconductor module 921 and the cooler are stacked. .

  The semiconductor module 921 has a main body portion, a control terminal 922 and a main electrode terminal 923 projecting from the main body portion. The control terminal 922 is connected to the control circuit board 96, and the main power terminal 923 is connected to a plurality of bus bars 95 forming an electric flow path. Therefore, the control circuit board 96 and the bus bar 95 are arranged on opposite sides of the stacked body 94. Each bus bar 95 connected to the semiconductor module 921 has an external terminal for electrical connection to the outside (power supply or AC load). The power conversion device 9 has a terminal block (not shown) for mounting an external terminal, and the terminal of the external device and the external terminal are connected to the terminal block.

When the terminal block is equipped with auxiliary electronic components such as a power sensor for detecting the current flowing through the bus bar 95 and an interlock sensor for detecting the connection state between the terminal of the external device and the external terminal There is. These auxiliary electronic components are connected to the control circuit board 96 through conductive wires in order to exchange electric signals with the control circuit board 96. The conductive wire includes a board-side conductive wire connected to the control circuit board 96 and a component-side conductive wire connected to the auxiliary electronic component, and both are detachably connected by a connector.
Various electronic components such as the capacitor 922 constituting the electronic circuit, the laminated body 94, the control circuit board 96, the bus bar 95, and the terminal block are fixed to the case 94 and sealed in the case 94.

JP 2009-159767 A

  However, if the connector is not fixed at a predetermined position, the position of the conductive wire is not fixed, and the connector or the conductive wire may interfere with surrounding parts or may be damaged. Therefore, it is conceivable to provide a connector fixing portion on the terminal block. However, when the connector is fixed to the terminal block, since the distance between the terminal block and the control circuit board is large, the length of the board-side conductive wire becomes long. Therefore, there is a possibility that the substrate-side conductive wire may interfere with surrounding parts or get caught. Therefore, it is ideal that the connector is fixed at an intermediate position between the auxiliary electronic component and the control circuit board. When the connector is fixed to the terminal block, the terminal block is extended to the control circuit board side. It is necessary to provide a part.

  When the extending portion is provided on the terminal block, the vibration is transmitted to the extending portion by applying vibration to the power conversion device. Since the extended portion is formed offset from the terminal block, the swing width in the extended portion is increased, and the connector and the conductive wire fixed to the extended portion are greatly shaken. Thereby, there exists a possibility that a connector and a conductive wire may interfere with the components distribute | arranged to the periphery, or may be damaged. In some cases, the extended portion may be broken by vibration.

  Also, for maintenance and the like, the control circuit board is often arranged on the opening side of the case, and the terminal block is often arranged near the bottom of the case. In this case, if the connector is provided on the terminal block, the connector is arranged at a position that goes deeper from the opening of the case. Therefore, the attachment / detachment workability of the connector deteriorates, and the attachment / detachment work cannot be performed depending on the arrangement.

  The present invention has been made in view of such problems, and is a power conversion device that can stably hold a connection body between a board-side connector and a component-side connector, and that can be easily attached and detached. Is to provide.

The present invention provides a plurality of component electronic components constituting a power conversion circuit, a cooling means for cooling at least some of the component electronic components, a control circuit board connected to the component electronic components, and input of controlled power. A power conversion device in which a terminal block on which an output terminal is mounted is housed in a case,
At least a part of the component electronic components, the cooling means, the control circuit board, and the terminal block are integrated with a frame to which they are fixed to constitute one internal unit,
The internal unit is fixed in the case in the frame,
The frame is formed so as to surround at least a part of the constituent electronic components constituting the internal unit,
The control circuit board and the terminal block are arranged on opposite sides of the frame,
The control circuit board and the auxiliary electronic component mounted on the terminal block are connected to each other by a board-side conductive wire and a component-side conductive wire respectively extending from both.
An end of the board-side conductive wire opposite to the control circuit board and an end of the component-side conductive wire opposite to the auxiliary electronic component are detachably connected to the board-side connector. With component side connectors,
A connection body in which the board-side connector and the component-side connector are connected is fixed to the frame.

  In the power conversion device of the present invention, the control circuit board and the terminal block are disposed on opposite sides of the frame, and the connection body is fixed to the frame. Therefore, the connection body can be stably fixed near an intermediate position between the control circuit board and the terminal block. Moreover, this can prevent the board-side conductive wire and the component-side conductive wire from interfering with peripheral components.

  Further, by fixing the connection body to the case, the fixing position of the connection body can be a position close to the opening of the case. Therefore, the board-side connector and the component-side connector that form the connection body can be attached and detached after the internal unit is assembled to the case or during maintenance of the power conversion device. Therefore, the assembly workability and maintenance workability of the power converter can be improved.

  As described above, according to the present invention, it is possible to provide a power conversion device that can stably hold a connection body between a board-side connector and a component-side connector and can easily attach and detach the connection body. .

BRIEF DESCRIPTION OF THE DRAWINGS FIG. The A arrow directional view of FIG. FIG. 3 is an explanatory diagram illustrating a frame in the first embodiment. B arrow view of FIG. Explanatory drawing which shows the bracket in Example 1. C arrow line view of FIG. FIG. 3 is an explanatory diagram illustrating an internal unit according to the first embodiment. D arrow line view of FIG. E arrow line view of FIG. Explanatory drawing which shows the power converter device in a prior art example.

  The power converter is mounted on, for example, an electric vehicle, a hybrid vehicle, or the like, and is used to convert power supply power into drive power for driving a drive motor.

  The substrate-side conductive wire is preferably integrated with an external connection conductive wire having one end connected to an external connector fixed to the case. In this case, since the board-side connector and the component-side connector have to be connected after the internal unit is disposed in the case, the mounting workability between the board-side connector and the component-side connector is particularly good. It becomes important. Therefore, in this configuration, the connecting body is fixed to the frame, so that the assembly workability of the power conversion device can be greatly improved.

  Further, the connection body is arranged facing the inner side surface or the outer side surface of the frame, and the connection direction between the board side connector and the component side connector is a normal line of the inner side surface or the outer side surface of the frame. It is preferable to be orthogonal to the direction (Claim 3). In this case, the board-side conductive wire and the component-side conductive wire can be disposed along the inner side surface or the outer side surface of the frame. Thereby, while preventing that the said board | substrate side conductive wire and the said component side conductive wire interfere with the components arrange | positioned around, the arrangement | positioning space of the said board | substrate side conductive wire and the said component side conductive wire is reduced, The external shape of the power converter can be reduced. Moreover, it can suppress that the said board | substrate side conductive wire or the said component side conductive wire interferes with a surrounding component at the time of the attachment or detachment of the said connection body.

  In addition, the connection body is attached to the frame so that the connection direction of the board-side connector and the component-side connector is inclined with respect to the arrangement direction of the control circuit board, the frame, and the terminal block. It is preferably fixed (claim 4). In this case, the connection direction between the board-side connector and the component-side connector can be a direction having a vector component facing the opening side of the case. Thereby, even after the internal unit is assembled to the case, the connection work between the board-side connector and the component-side connector can be easily performed. On the other hand, since the connection direction is not parallel to the opening direction of the case, the substrate-side conductive wire or the component-side conductive wire can be prevented from interfering with the inner wall surface of the case.

  Moreover, it is preferable that the connection body is fixed to the frame via a bracket. In this case, the shape of the frame can be a simple shape. Therefore, it is possible to prevent an increase in the component cost of the frame.

  The bracket includes a frame fixing portion fixed to the frame and a connection body fixing portion for fixing the connection body, and the frame fixing portion and the connection body fixing portion are orthogonal to each other. (Claim 6). In this case, the fixing direction for fixing the connection body to the bracket and the fixing direction for fixing the bracket to the frame can be orthogonal to each other. Can be improved. For example, the bracket can be arranged so that the frame fixing portion is parallel to the upper surface of the frame and the connection body fixing portion is parallel to the outer surface of the frame. Thereby, when assembling the bracket to the frame, it can be performed by work from above with good workability. Moreover, the said connection body fixing | fixed part can be distribute | arranged facing the inner surface or outer surface suitable for fixing the said connection body.

  The frame fixing portion includes a bolt insertion hole for inserting a bolt for fastening and fixing the bracket to the frame, an engagement portion that engages with an engaged portion provided in the frame, and the bolt It is preferable to have a detent portion that prevents rotation of the bracket when fastening. In this case, the workability of assembling the bracket can be improved, and the bracket can be assembled more easily.

  The terminal block is provided with a plurality of the auxiliary electronic components, and the plurality of connection bodies provided for each of the plurality of auxiliary electronic components are fixed in different shapes corresponding to the fixing means. Means are preferably provided (claim 8). In this case, even when a plurality of the connection bodies are provided, the connection bodies can be assembled into the fixed holes. Therefore, it is possible to prevent the component-side conductive wire and the substrate-side conductive wire from interfering with components arranged in the vicinity by assembling the connection body in the wrong fixing hole.

Example 1
A power conversion device 1 according to an embodiment of the present invention will be described with reference to FIGS.
As shown in FIGS. 1 and 2, the power conversion device 1 includes a plurality of constituent electronic components 12 (semiconductor module 121, capacitor 124, etc.) that constitute a power conversion circuit, and at least some of the electronic components (semiconductor module 121). A cooling means for cooling, a control circuit board 15 connected to the component electronic component 12, and a terminal block 2 on which terminals for input / output of controlled power are mounted are accommodated in a case 6. At least a part of the constituent electronic component 12, the cooling means, the control circuit board 15, and the terminal block 2 are integrated with a frame 5 to which they are fixed to form one internal unit 10, and the internal unit The unit 10 is fixed in the case 6 in the frame 5.

  The frame 5 is formed so as to surround the semiconductor module 121 constituting the internal unit 10. The control circuit board 15 and the terminal block 2 are disposed on opposite sides of the frame 5, and the control circuit board 15 and the auxiliary electronic component 22 (current sensor 221, interlock sensor) mounted on the terminal block 2 are disposed. 222) are connected to each other by a substrate-side conductive wire 31 and a component-side conductive wire 23 respectively extending from both. An end of the board-side conductive wire 31 opposite to the control circuit board 15 and an end of the component-side conductive wire 23 opposite to the auxiliary electronic component 22 are detachably connected to each other. And a component-side connector 24. A connection body 45 connecting the board side connector 32 and the component side connector 24 is fixed to the frame 5.

The power conversion device 1 of this example will be described in more detail.
The direction in which the semiconductor module 121 and the cooling pipe 131 are stacked is the stacking direction X, the longitudinal direction of the cooling pipe 131 is the horizontal direction Y, and the direction perpendicular to both the stacking direction X and the horizontal direction Y is the height direction. Z will be described below.
In the stacking direction X, the front end side where the refrigerant introduction pipe 132 and the refrigerant discharge pipe 133 protrude from the case 6 is defined as the front side, and the opposite side is defined as the rear side. Further, in the height direction Z, a side on which a lid 62 (see FIG. 1) described later is disposed is an upper side, and the opposite side is a lower side. Therefore, in this example, the terminal block 2 is arranged below in the height direction Z of the frame 5, and the control circuit board 15 is arranged above in the height direction Z of the frame 5.

As shown in FIGS. 1 and 2, the power conversion device 1 includes an internal unit 10 that includes a power conversion circuit, and a case 6 that encloses the internal unit 10.
As shown in FIGS. 7 to 9, the internal unit 10 includes a stacked body 11 formed by stacking a plurality of semiconductor modules 121 and a plurality of cooling pipes 131, and a frame 5 formed so as to surround the stacked body 11. The terminal block 2 is mounted with input / output terminals for controlled power and auxiliary electronic components 22 (current sensor 221 and interlock sensor 222).

As shown in FIG. 7, the stacked body 11 includes a semiconductor module 121 that constitutes a power conversion circuit, and a cooler 13 that is a cooling means for cooling the semiconductor module 121.
The semiconductor module 121 includes a switching element such as an IGBT (Insulated Gate Bipolar Transistor) or a MOSFET (MOS field effect transistor). As shown in FIGS. 4 and 5, the semiconductor module 121 includes a flat plate-like main body portion formed by resin-molding a switching element, and a main electrode terminal 122 and a control terminal 123 that protrude in opposite directions from the main body portion. . The main electrode terminal 122 protrudes downward in the height direction Z, and the control terminal 123 protrudes upward in the height direction Z. The main electrode terminal 122 is connected to a bus bar, and controlled power is input to and output from the semiconductor module 121 through the bus bar. The control terminal 123 is connected to the control circuit board 15 and receives a control current for controlling the switching element. Two semiconductor modules 121 are arranged in parallel between the pair of cooling pipes 131.

  As shown in FIG. 7, the cooler 13 includes a refrigerant flow path disposed on both surfaces of the semiconductor module 121, a refrigerant introduction pipe 132 and a refrigerant discharge pipe 133 for circulating a cooling medium through the refrigerant flow path. Yes. In this example, the refrigerant flow path is formed by a cooling pipe 131 made of a metal such as aluminum, and a plurality of cooling pipes 131 are arranged so as to sandwich the semiconductor module 121 from both sides. Adjacent cooling pipes 131 are connected to each other by connecting pipes 134 in the vicinity of both ends in the lateral direction Y. And the laminated body 11 is formed by the cooling pipe 131 and the semiconductor module 121 being laminated | stacked alternately.

  As shown in FIG. 7, the refrigerant introduction pipe 132 and the refrigerant discharge pipe 133 are provided so as to protrude forward from the front surface of the cooling pipe 131 disposed at the front end portion of the multilayer body 11. The cooling medium introduced from the refrigerant introduction pipe 132 passes through the connection pipe 134 as appropriate, is distributed to the respective cooling pipes 131, and flows in the longitudinal direction (lateral direction Y). The cooling medium exchanges heat with the semiconductor module 121 while flowing through each cooling pipe 131. The coolant whose temperature has risen due to heat exchange passes through the connecting pipe 134 on the downstream side as appropriate, is guided to the refrigerant discharge pipe 133, and is discharged. Examples of the cooling medium include natural refrigerants such as water and ammonia, water mixed with ethylene glycol-based antifreeze, fluorocarbon refrigerants such as fluorinate, chlorofluorocarbon refrigerants such as HCFC123 and HFC134a, and alcohol-based alcohols such as methanol and alcohol. A refrigerant such as a refrigerant or a ketone-based refrigerant such as acetone can be used.

As shown in FIG. 7, the laminated body 11 is pressed and held by the urging force of the pressure member 54 inside the frame 5. As shown in the figure, the frame 5 is formed so as to surround the laminated body 11 constituting the internal unit 10 from four directions. The frame 5 can be formed of a molded body of a metal or alloy such as aluminum or iron, for example.
On the outer peripheral surface of the frame 5, unit fixing portions 55 for fixing the internal unit 10 to the case 6 are provided at both ends in the stacking direction X on the surface located on the lateral direction Y side. The unit fixing portion 55 is formed to protrude outward from the frame 5.

  Further, as shown in FIGS. 3 and 4, the frame 5 includes a front wall portion 51 and a rear wall portion 52 disposed on both sides in the stacking direction X in the stacked body 11, and a front wall portion 51 and a rear wall portion 52. It has a pair of side wall part 53 connected in the both ends. A concave surface for piping for inserting the refrigerant introduction pipe 132 and the refrigerant discharge pipe 133 is formed in the front wall portion 51. A boss 522 for fixing a bracket 4 to be described later is provided on the rear outer surface 521 of the rear wall 52, and a tap hole 523 for fastening and fixing the bracket 4 is formed on the upper surface of the boss 522. It is formed. Further, an engaged portion 524 formed to project upward is provided on the upper surface of the rear wall portion 52.

  As shown in FIG. 7, a boss 522 formed on the frame 5 is provided with a bracket 4 for fixing a first connection body 451 and a second connection body 452 described later. As shown in FIGS. 5 and 6, the bracket 4 includes a frame fixing portion 41 that is fixed to the upper surface of the frame 5, and a connection body fixing portion 42 that fixes the first connection body 451 and the second connection body 452. The frame fixing part 41 and the connection body fixing part 42 are orthogonal to each other.

  As shown in FIGS. 5 and 7, the frame fixing portion 41 includes a bolt insertion hole 413 for inserting a bolt 46 for fastening and fixing the bracket 4 to the frame 5, and an engaged portion provided in the frame 5. It has the engaging part 411 engaged with 524, and the rotation prevention part 412 which prevents rotation of the bracket 4 when the volt | bolt 46 is fastened. In a state before the bracket 4 is fixed to the boss 522 with the bolt 46, the bracket 4 disposed on the upper surface of the boss 522 engages the engaging portion 411 with the front surface of the engaged portion 524. Can be held in. Further, when the bracket 4 is fastened and fixed to the boss 522, the fastening torque is transmitted to the bracket 4 via the bolt 46, so that the bracket 4 tends to rotate. At this time, the rotation of the bracket 4 is prevented by bringing the rotation preventing portion 412 into contact with the rear surface of the engaged portion 524.

  Further, as shown in FIGS. 5 and 6, the connection body fixing portion 42 has a first fixing hole 431 for fixing the first connection body 451 and a second fixing hole for fixing the second connection body 452. Two fixing holes 43 of 432 are provided. The first fixing hole 431 has a shape combining an oval and one narrow groove, and the second fixing hole 432 has a shape combining a circle and two narrow grooves.

  In addition, the first fixing hole 431 is a direction in which the connection direction between the board-side connector 32 and the component-side connector 24 in the first connection body 451 fixed to the first fixing hole 431 is inclined with respect to the height direction Z. It is formed so that Similarly, the second fixing hole 432 is a direction in which the connecting direction of the board-side connector 32 and the component-side connector 24 in the second connecting body 452 fixed to the second fixing hole 432 is inclined with respect to the height direction Z. It is formed so that The connection direction in the first connection body and the second connection body was set to a direction connecting the on-board connector 151 on the control circuit board 15 and the terminal block 2. The board-side conductive wire 31 extends in the opposite direction from the surface of the board-side connector 32 opposite to the connection side with the component-side connector 24, and the component-side conductive wire 23 is connected to the board-side connector of the component-side connector 24. 32 extends in the opposite direction from the surface opposite the connection side.

  In the internal unit 10, a control circuit board 15 that controls the semiconductor module 121 is disposed above the frame 5. The control circuit board 15 is connected to the control terminal 123 of the semiconductor module 121. An on-board connector 151 is provided on the upper surface of the control circuit board 15 and is configured to be connectable to a board connection connector 33 of a board-side wire assembly 3 described later.

Further, as shown in FIGS. 8 and 9, below the frame 5, a terminal block 2 having input / output terminals for connection to external devices, a capacitor 124 connected to the input / output terminals, and a semiconductor A plurality of bus bars connecting the module 121 and the capacitor 124 to the input / output terminals are arranged.
A plurality of bus bars (not shown) are held by a bus bar holding portion made of an insulating material (rigid resin) to constitute a bus bar assembly 14. One end of the plurality of bus bars is connected to the semiconductor module 121 and the capacitor 124, and the other end is connected to an input / output terminal provided on the terminal block 2.

  An input / output terminal disposed at one end of the bus bar is electrically connected to a pair of capacitor terminals (not shown) electrically connected to the pair of electrodes of the capacitor 124 and the main electrode terminal 122 of the semiconductor module 121. In addition, three output terminals (not shown) connected to the respective electrodes of the three-phase AC rotating electric machine (not shown) are provided.

  The terminal block 2 is fastened and fixed to a terminal block support (not shown) provided below the frame 5 using bolts (not shown). The terminal block 2 is provided with the above-described input / output terminals and auxiliary electronic components 22. The auxiliary electronic component 22 has a component-side conductive wire 23. In this example, the auxiliary electronic component 22 includes a current sensor 221 and an interlock sensor 222. The component-side conductive wire 23 includes a first component-side conductive wire 231 connected to the current sensor 221 and a second component-side conductive wire 232 connected to the interlock sensor 222.

  As shown in FIGS. 8 and 9, the current sensor 221 is a sensor that detects the current flowing through the input / output terminal, and is connected to one end of the first component-side conductive wire 231. A first component-side connector 241 is provided at the other end of the first component-side conductive wire 231. The first component-side connector 241 is provided with a first fixing portion 242 that can be fitted and fixed to the first fixing hole 431 of the bracket 4. The first fixing portion 242 is configured not to fit into the second fixing hole 432. Further, the first component-side conductive wire 231 is fixed so as to face the rear outer surface 521 of the frame 5 by fitting and fixing the first fixing portion 242 provided in the first component-side connector 241 into the first fixing hole 431. It is.

  The interlock sensor 222 is a sensor for detecting whether or not a connector of an external device is connected to the input / output terminal. When the interlock sensor 222 detects that the connector of the external device is not connected, the detection signal is transmitted to the control circuit, and the control circuit cuts off the current flowing through the power conversion circuit. This prevents an accident in which the operator touches the input / output terminal and is electrocuted.

  As shown in FIGS. 8 and 9, the interlock sensor 222 is connected to one end of the second component-side conductive wire 232, and a second component-side connector 243 is provided at the other end. The second component side connector 243 is provided with a second fixing portion 244 that can be fitted and fixed to the second fixing hole 432 of the bracket 4. The second fixing portion 244 is configured not to fit into the first fixing hole 431. The second component-side conductive wire 232 is fixed to the rear outer surface 521 of the frame 5 by fitting and fixing the second fixing portion 244 provided in the second component-side connector 243 into the second fixing hole 432. It is.

  The connection direction of the first component side connector 241 and the second component side connector 242 fixed to the first fixing hole 431 and the second fixing hole 432, respectively, with respect to the board side connector 32 is inclined with respect to the height direction Z. ing. This connection direction is substantially the same as the direction connecting the on-board connector 151 on the control circuit board 15 and the terminal block 2.

  The internal unit 10 configured as described above is accommodated in the case 6 as shown in FIGS. 1 and 2. The case 6 includes a case main body 61 that is open at the top and a lid 62 that closes the opening of the case main body 61.

  The case main body 61 includes a rectangular bottom portion 612 and four wall portions 613 erected upward from each side of the bottom portion 612 and a flange portion 614 provided on the outer periphery of the opening. On the bottom portion 612 of the case body 61, the board-side wire assembly 3 having the board connection connector 33 connected to the board connector 151 provided on the control circuit board 15 is disposed.

  The board-side wire assembly 3 is formed by integrating an external connection conductive wire 34 that is connected to an external device and two board-side conductive wires 31 that are respectively connected to the auxiliary electronic component 22 arranged on the terminal block 2. One end of the external connection conductive wire 34 and the board-side conductive wire 31 is connected to a board connection connector 33 configured to be connectable to an on-board connector 151 provided on the control circuit board 15. An external connector 341 for connecting to an external device is disposed on the other end of the external connection conductive wire 34. The external connector 341 is fixed to the bottom 612 of the case body 61. Thereby, the board | substrate side wire assembly 3 is being fixed to the case main body 61. FIG.

Moreover, the board | substrate side conductive wire 31 consists of the two board | substrate side conductive wires 31 of the 1st board | substrate side conductive wire 311 and the 2nd board | substrate side conductive wire 312, as shown in FIG.1 and FIG.2.
In the first substrate-side conductive wire 311, a first substrate-side connector 321 is disposed at the end opposite to the side on which the substrate connector 33 is disposed. The first board side connector 321 is configured to be connectable to the first component side connector 241 connected to the current sensor 221.
In addition, a second board side connector 322 is arranged at the end of the second board side conductive wire 312 opposite to the side on which the board connection connector 33 is arranged. The second board side connector 322 is configured to be connectable to the second component side connector 243 connected to the interlock sensor 222.

  In this example, the shapes of the first component-side connector 241 and the second component-side connector 243 and the shapes of the first board-side connector 321 and the second board-side connector 322 are different. Therefore, the combination of the first component-side connector 241 and the second board-side connector 322 or the combination of the second component-side connector 243 and the first board-side connector 321 cannot be erroneously connected. .

  As shown in FIGS. 1 and 2, the internal unit 10 is fixed by fastening a unit support portion 611 provided on the outer periphery of the frame 5 to a unit support portion 611 provided inside the case 6 with a bolt (not shown). The After the internal unit 10 is fixed to the case main body 61, the board connection connector 33 of the board side wire assembly 3 is connected to the board connector 151 of the control circuit board 15. Next, the second board side connector 322 of the second board side conductive wire 312 is connected to the second component side connector 243 fixed to the bracket 4, and the first board side connector 321 of the first board side conductive wire 311 is connected. The first component side connector 241 fixed to the bracket 4 is connected.

As shown in FIGS. 1 and 2, the lid body 62 has an upper surface portion 621 having substantially the same shape as the bottom portion 612 of the case body 61, and four wall portions 622 depending downward from each side of the upper surface portion 621. In addition, a flange portion 623 is provided on the outer periphery of the opening formed by the four wall portions 622.
The case main body 61 and the lid body 62 are overlapped with each other in a state where a sealing material (not shown) is interposed between the opening ends of the case main body 61 and the lid body 62, and fastened with bolts and nuts (not shown). 1 assembly is completed.

Next, the function and effect of this example will be described.
In the power conversion device 1 of this example, the control circuit board 15 and the terminal block 2 are disposed on opposite sides of the frame 5, and the connection body 45 is fixed to the frame 5. Therefore, the connection body 45 can be stably fixed near the intermediate position between the control circuit board 15 and the terminal block 2. Thereby, it is possible to prevent the substrate-side conductive wire 31 and the component-side conductive wire 23 from interfering with peripheral components.

  In addition, by fixing the connection body 45 to the case 6, the fixing position of the connection body 45 can be made close to the opening of the case 6. Therefore, the board-side connector 32 and the component-side connector 24 constituting the connection body 45 can be attached and detached after the internal unit 10 is assembled to the case 6 or during maintenance of the power conversion device 1. Therefore, the assembly workability and maintenance workability of the power conversion device 1 can be improved.

  The board-side conductive wire 31 is integrated with the external connection conductive wire 34 having one end connected to the external connector 341 fixed to the case 6. Therefore, since the board side connector 32 and the component side connector 24 have to be connected after the internal unit 10 is arranged in the case 6, the mounting workability between the board side connector 32 and the component side connector 24 is particularly important. Become. Therefore, in this configuration, the connecting body 45 is fixed to the frame 5, so that the assembly workability of the power conversion device 1 can be greatly improved.

  The connection body 45 is arranged facing the rear outer surface 521 of the frame 5, and the connection direction of the board side connector 32 and the component side connector 24 is in the normal direction of the rear outer surface 521 of the frame 5. They are orthogonal to each other. Therefore, the board-side conductive wire 31 and the component-side conductive wire 23 can be disposed along the rear outer surface 521 of the frame 5. Thereby, while preventing that the board | substrate side conductive wire 31 and the component side conductive wire 23 interfere with the components arrange | positioned around, the arrangement | positioning space of the board | substrate side conductive wire 31 and the component side conductive wire 23 is reduced, The external shape of the power converter 1 can be reduced. Further, it is possible to prevent the substrate-side conductive wire 31 or the component-side conductive wire 23 from interfering with surrounding components when the connecting body 45 is attached or detached.

  In the connection body 45, the connection direction between the board-side connector 32 and the component-side connector 24 is inclined with respect to the arrangement direction (height direction Z) of the control circuit board 15, the frame 5, and the terminal block 2. As shown in FIG. Therefore, the connection direction between the board-side connector 32 and the component-side connector 24 can be a direction having a vector component facing the opening side of the case 6. Thereby, even after the internal unit 10 is assembled to the case 6, the connection work between the board-side connector 32 and the component-side connector 24 can be easily performed. On the other hand, since the connection direction is not parallel to the opening direction of the case, it is possible to prevent the substrate-side conductive wire 31 or the component-side conductive wire 23 from interfering with the inner wall surface of the case 6.

  The connecting body 45 is fixed to the frame 5 via the bracket 4. Therefore, the shape of the frame 5 can be a simple shape. Therefore, it is possible to prevent the cost of parts of the frame 5 from increasing.

  The bracket 4 includes a frame fixing portion 41 fixed to the frame 5 and a connection body fixing portion 42 for fixing the connection body 45. The frame fixing portion 41 and the connection body fixing portion 42 are orthogonal to each other. Yes. Therefore, the fixing direction for fixing the connecting body 45 to the bracket 4 and the fixing direction for fixing the bracket 4 to the frame 5 can be made orthogonal to each other, and the workability of assembling the bracket 4 is improved. be able to.

  The frame fixing portion 41 is engaged with a bolt insertion hole 413 for inserting a bolt 46 for fastening and fixing the bracket 4 to the frame 5, and an engaging portion 411 engaged with an engaged portion 524 provided in the frame 5. And a detent portion 412 that prevents the bracket 4 from rotating when the bolt 46 is fastened. Therefore, the workability of assembling the bracket 4 can be improved, and the bracket 4 can be assembled more easily.

  The terminal block 2 is provided with a plurality of auxiliary electronic components 22, and each of the first connection body 451 and the second connection body 452 provided in the current sensor 221 and the interlock sensor 222 has a first fixed portion. A first fixing hole 431 and a second fixing hole 432 having different shapes corresponding to the 242 and the second fixing portion 244 are provided. Therefore, even when a plurality of connection bodies 45 are provided, the connection bodies 45 can be assembled in the fixed holes. Therefore, it is possible to prevent the component-side conductive wire 23 and the board-side conductive wire 31 from interfering with components arranged in the vicinity by assembling the connection body 45 to the wrong fixing hole.

In addition, there is an advantage that vibration of the connection body 45 can be suppressed as compared with the case where an extending portion extending from the terminal block 2 toward the on-board connector is provided and the connection body 45 is disposed at substantially the same position as this example. . In other words, if the terminal block 2 is provided with an extending portion and the connecting body 45 is provided there, when vibration is applied to the power converter 1, the vibration is transmitted to the extending portion. Since the extended portion is formed offset from the terminal block 2, the swing width in the extended portion is increased, and the connection body 45, the board-side conductive wire 23, and the component-side conductive wire 31 fixed to the extended portion are provided. It will shake greatly. Thereby, there exists a possibility that the connection body 45, the board | substrate side conductive wire 23, and the component side conductive wire 31 may interfere with the components distribute | arranged to the periphery, or may be damaged. In some cases, the extended portion may be broken by vibration.
On the other hand, by fixing the connection body 45 to the frame 5 as in this example, vibration of the connection body 45 can be suppressed even when vibration is applied to the power conversion device 1. Accordingly, the connection body 45 can be stably held, and interference between the connection body 45, the board-side conductive wire 23, the component-side conductive wire 31, and the components arranged in the periphery can be prevented.

  As described above, according to this example, the power conversion device 1 that can stably hold the connection body 45 between the board-side connector 32 and the component-side connector 24 and can easily attach and detach the connection body 45 is provided. Can be provided.

DESCRIPTION OF SYMBOLS 1 Power converter 10 Internal unit 12 Configuration electronic component 15 Control circuit board 2 Terminal block 22 Auxiliary electronic component 23 Component side conductive wire 24 Component side connector 31 Substrate side conductive wire 32 Substrate side connector 45 Connection body 5 Frame 6 Case

Claims (8)

A plurality of component electronic components constituting a power conversion circuit, cooling means for cooling at least some of the component electronic components, a control circuit board connected to the component electronic components, and a terminal for input / output of controlled power A power conversion device in which a terminal block to be mounted is housed in a case,
At least a part of the component electronic components, the cooling means, the control circuit board, and the terminal block are integrated with a frame to which they are fixed to constitute one internal unit,
The internal unit is fixed in the case in the frame,
The frame is formed so as to surround at least a part of the constituent electronic components constituting the internal unit,
The control circuit board and the terminal block are arranged on opposite sides of the frame,
The control circuit board and the auxiliary electronic component mounted on the terminal block are connected to each other by a board-side conductive wire and a component-side conductive wire respectively extending from both.
An end of the board-side conductive wire opposite to the control circuit board and an end of the component-side conductive wire opposite to the auxiliary electronic component are detachably connected to the board-side connector. With component side connectors,
The power converter according to claim 1, wherein the connection body connecting the board-side connector and the component-side connector is fixed to the frame.   2. The power conversion device according to claim 1, wherein the substrate-side conductive wire is integrated with an external connection conductive wire having one end connected to an external connector fixed to the case. 3. apparatus.   3. The power conversion device according to claim 1, wherein the connection body is arranged facing an inner surface or an outer surface of the frame, and a connection direction between the board-side connector and the component-side connector is set. A power conversion device, wherein the power conversion device is orthogonal to a normal direction of an inner surface or an outer surface of the frame.   4. The power converter according to claim 3, wherein in the connection body, a connection direction of the board-side connector and the component-side connector is inclined with respect to an arrangement direction of the control circuit board, the frame, and the terminal block. The power conversion device is fixed to a frame so as to be in the direction.   The power converter according to any one of claims 1 to 3, wherein the connection body is fixed to the frame via a bracket.   6. The power conversion device according to claim 5, wherein the bracket includes a frame fixing portion that is fixed to the frame and a connection body fixing portion that fixes the connection body, and the frame fixing portion and the connection body fixing portion. Is a power converter characterized by being orthogonal to each other.   7. The power conversion device according to claim 6, wherein the frame fixing portion is engaged with a bolt insertion hole for inserting a bolt for fastening and fixing the bracket to the frame, and an engaged portion provided in the frame. An electric power conversion device comprising: an engaging portion to be joined; and a rotation preventing portion for preventing rotation of the bracket when the bolt is fastened.   In the power converter according to any one of claims 5 to 7, A plurality of the above-mentioned auxiliary electronic parts are arranged in the above-mentioned terminal block, and a plurality of above-mentioned connection objects provided for every above-mentioned some auxiliary electronic parts Includes a fixing means having different shapes corresponding to each of the fixing means.

Images