JP6932219B1 - Power converter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a power conversion device capable of passing a magnetic core through a bent portion in a bus bar provided with a bent portion and capable of miniaturization and cost reduction. SOLUTION: The bus bar is provided with a power module for converting electric power, a plate-shaped bus bar connected to a power terminal of the power module, and a magnetic core having a notch while surrounding the bus bar in a tubular shape. The magnetic core has a bent portion on one side and one or both of the other side where the magnetic core is arranged, and the bent portion is bent in a plurality of stages so that the magnetic core can be inserted. [Selection diagram] Fig. 5

Description

The present application relates to a power converter.

An electric vehicle such as an electric vehicle or a hybrid vehicle in which a motor is used as a drive source is equipped with a plurality of power conversion devices. Power converters include a charger that converts a commercial AC power supply to a DC power supply and charges the high-voltage battery, and a DC / DC converter that converts the DC power supply of the high-pressure battery to the voltage of the battery for auxiliary equipment (for example, 12V). Examples thereof include an inverter that converts DC power from a battery into AC power to a motor. Power conversion devices mounted on electrified vehicles such as electric vehicles and hybrid vehicles are required to be miniaturized due to improvements in space efficiency and an increase in on-board equipment due to electrification. Further, in order to suppress the increase in vehicle cost due to electrification, it is also required to reduce the cost of the power conversion device.

The bus bar provided for output by the inverter, which is a power converter, is connected to the input terminal of the motor, which is an electric motor. By connecting the inverter and the motor via the bus bar, a current circuit is formed between the inverter and the motor, and electric power is supplied from the battery to the motor via the inverter. The current flowing through the bus bar is measured, and feedback control of the voltage and frequency applied to the motor is performed based on the measured current value. The feedback control controls the rotation speed and torque of the motor.

A current sensor is used to measure the current flowing through the bus bar. The current sensor is composed of, for example, a C-shaped magnetic core provided so as to surround the bus bar and having a notch, and a magnetic sensor such as a Hall IC provided in the notch of the magnetic core. .. The magnetic sensor is connected to the control board provided in the inverter and detects the magnetic flux generated in the notch due to the current flowing through the bus bar. As a current sensor having this configuration, a relay bus bar device in which a current sensor is integrated with a relay bus bar connecting a motor and a power terminal of an inverter is disclosed (see, for example, Patent Document 1). The current sensor consists of a magnetic core that is fitted into a resin plate that is integrally molded with resin around a long relay bus bar, and a magnetic sensor that is mounted on a substrate and placed in a notch in the magnetic core. It is composed of and.

Japanese Unexamined Patent Publication No. 2013-170984

In Patent Document 1, since the relay bus bar is integrally molded on the resin plate at the time of resin molding, it can be miniaturized as a relay bus bar device incorporating a current sensor. However, since the space required for mounting the magnetic core and the magnetic sensor is large and the number of parts required for assembling the relay bus bar device is large, there is a problem that it is difficult to reduce the size and cost of the power conversion device. rice field.

When the power terminal of the inverter and the input terminal of the motor are on the same plane, the magnetic core is inserted from the end of the long relay bus bar extending in one direction to position the magnetic core in a predetermined position. Can be placed. However, when the power terminal of the inverter and the input terminal of the motor are not in the same plane, it is difficult to arrange the magnetic core through which the bent portion is inserted when using a bus bar having a bent portion that is not long. There was a challenge.

Therefore, an object of the present application is to obtain a power conversion device in which a magnetic core can be inserted through a bent portion in a bus bar provided with a bent portion, and the size and cost can be reduced.

The power conversion device disclosed in the present application includes a power module for converting electric power, a plate-shaped bus bar connected to a power terminal of the power module, and a magnetic core having a tubular shape surrounding the bus bar and a notch. The bus bar has a bent portion on one side and one or both of the arrangement portion of the magnetic core, and the bent portion allows the magnetic core to be inserted through the bent portion of the bus bar on one side of the bent portion. The plate surface of the portion and the plate surface of the bus bar portion on the other side of the bent portion are at right angles, and the plate surface between the bus bar portion on one side and the bus bar portion on the other side is bent in two steps, and the bus bar is bent. On one side or the other side of the magnetic core on one side or the other side via the bent portion, a connection point with the power terminal having the same shape as the power terminal and facing the power terminal is provided in a straight line. The power terminal is connected via a welded portion .

According to the power conversion device disclosed in the present application, the bus bar provided in the power conversion device has a bent portion on one side and one or both of the arrangement locations of the magnetic core, and the bent portion has a plurality of stages. Since the magnetic core can be inserted through the bent portion, the magnetic core can be inserted through the bent portion, and the power conversion device can be miniaturized and reduced in cost.

It is an exploded perspective view which shows the structure of the power conversion apparatus which concerns on Embodiment 1. FIG. It is a side view of the bus bar and the magnetic core of the power conversion apparatus which concerns on Embodiment 1. FIG. It is sectional drawing of the current sensor part of the power conversion apparatus which concerns on Embodiment 1. FIG. It is another cross-sectional view of the current sensor part of the power conversion apparatus which concerns on Embodiment 1. FIG. It is a side view of the main part of the bus bar of the power conversion apparatus which concerns on Embodiment 1. FIG. It is sectional drawing of the bus bar and the magnetic core of the power conversion apparatus which concerns on Embodiment 2. FIG. It is a side view of the main part of the bus bar of the power conversion device of the comparative example. It is a side view of the main part of the bus bar of the power conversion device of the comparative example.

Hereinafter, the power conversion device according to the embodiment of the present application will be described with reference to the drawings. In each figure, the same or corresponding members and parts will be described with the same reference numerals.

Embodiment 1.
FIG. 1 is an exploded perspective view showing the configuration of the power conversion device 100 according to the first embodiment, FIG. 2 is a side view of the V-phase bus bar 9b and the magnetic core 12 which are bus bars 9 of the power conversion device 100, and FIG. A cross-sectional view of the current sensor unit 14 of the conversion device 100, FIG. 4 is another cross-sectional view of the current sensor unit 14 of the power conversion device 100, and FIG. 5 is a side view of a main part of the bus bar 9 of the power conversion device 100. FIG. 2 is a diagram showing the resin 15 in which a part of the bus bar 9 and the magnetic core 12 are integrated is removed. The power conversion device 100 that converts electric power is mounted on a vehicle such as an electric vehicle or a hybrid vehicle that uses a motor as one of the drive sources. The power conversion device 100 here converts the DC power supplied from the in-vehicle battery into three-phase power, and supplies the converted three-phase AC power to the motor which is the load.

<Outline of configuration of power converter 100>
As shown in FIG. 1, the power conversion device 100 includes a smoothing capacitor 1, three power modules 2, 3, 4, a heat sink 5, and a control board 7. The power conversion device 100 further includes three bus bars 9 for connecting each of the power modules 2, 3 and 4 and a motor (not shown), a magnetic core 12 arranged in each bus bar 9, and a control board 7. A magnetic sensor 13 connected to is provided. The current sensor unit 14 is composed of the magnetic core 12 and the magnetic sensor 13. In FIG. 1, only the terminal portion of the magnetic sensor 13 attached to the control board 7 is visible, and the main body portion of the magnetic sensor 13 arranged in the notch portion 12a of the magnetic core 12 is not visible. The three power modules 2, 3 and 4 are provided side by side on the mounting surface 5a, which is one surface of the plate-shaped heat sink 5, and are cooled by the heat sink 5. The smoothing capacitor 1, the other surface of the heat sink 5, and the PN terminal block 8 are assembled to the base 6 by, for example, bolts together with other parts (not shown), and the base 6 is attached to the vehicle. Each of the three bus bars 9 and the current sensor unit 14 has the same configuration.

The smoothing capacitor 1 smoothes the DC power supplied from the vehicle-mounted battery (not shown) and supplies it to each of the power modules 2, 3, and 4. The smoothing capacitor 1 includes three P bus bars 1a and three N bus bars 1b, respectively. Each P bus bar 1a is connected to input terminals P2a, 3a, 4a provided in each of the power modules 2, 3 and 4. Each N bus bar 1b is connected to input terminals N2b, 3b, 4b provided in each of the power modules 2, 3 and 4. The smoothed DC power is supplied to the power modules 2, 3 and 4 via the P bus bar 1a and the N bus bar 1b.

The power modules 2, 3 and 4 convert the smoothed DC power into three-phase AC power and output it to the motor. Each of the power modules 2, 3 and 4 has a semiconductor element that performs power conversion inside. Each of the opposite side surfaces of the power modules 2, 3 and 4 includes a plurality of signal terminals 2d, 3d and 4d extending in the vertical direction from the mounting surface 5a. The control board 7 has a circuit for controlling the operation of the power modules 2, 3 and 4. The control board 7 is arranged so as to face the mounting surface 5a. The signal terminals 2d, 3d, and 4d are connected to the control board 7.

The power modules 2, 3 and 4 are provided with input terminals P2a, 3a and 4a and input terminals N2b, 3b and 4b on one side surface. Further, the power modules 2, 3 and 4 are provided with U-phase terminals 2c, V-phase terminals 3c, and W-phase terminals 4c, which are power terminals, on the other side surface. The U-phase terminal 2c, the V-phase terminal 3c, and the W-phase terminal 4c each output the power of each phase (U-phase, V-phase, W-phase) of the converted three-phase AC power. The terminals of the power modules 2, 3 and 4 are all made of a conductive material.

The plate-shaped bus bar 9 has a U-phase bus bar 9a, a V-phase bus bar 9b, and a W-phase bus bar connected to each of the U-phase terminal 2c, the V-phase terminal 3c, and the W-phase terminal 4c at the connection point 10 which is one of the tip portions. 9c is provided. The U-phase bus bar 9a, the V-phase bus bar 9b, and the W-phase bus bar 9c are connected to an input terminal (not shown) provided on the motor at the fastening portion 11 which is the other tip portion. Three-phase AC power is supplied to the motor via the plate-shaped bus bar 9. The connection portion 10 has, for example, a linear portion of about 5 mm, and is provided in the same shape as the U-phase terminal 2c, the V-phase terminal 3c, and the W-phase terminal 4c. The connection point 10 and the U-phase terminal 2c, the V-phase terminal 3c, and the W-phase terminal 4c are connected by, for example, TIG welding, and the connection point 10 and the U-phase terminal 2c, the V-phase terminal 3c, and the W-phase terminal 4c are welded. It is connected via the portion 10a. When welding, it is necessary to grasp both linear portions with a jig and bring both end faces to be welded into contact with each other. If the linear portion is short, welding may not be possible, or even if welding is possible, a defect may occur. Therefore, the productivity of the power conversion device 100 can be improved by providing the linear portion. A fastening hole 11a is provided at the fastening portion 11, and the input terminal of the motor and the fastening hole 11a are fastened with screws, for example.

As shown in FIG. 2, the magnetic core 12 is arranged at a position where the bent portion 17 of the V-phase bus bar 9b is inserted. When the power terminals of the power modules 2, 3 and 4 and the input terminals of the motor are not in the same plane, they are bent to connect the power terminals and the input terminals instead of the long bus bar extending in one direction. A bus bar 9 is provided. The magnetic core 12 which is tubular and has a notch 12a is provided so as to surround each bus bar 9. As shown in FIG. 1, the magnetic sensor 13 is connected to a control board 7 provided so as to face the notch 12a. The magnetic sensor 13 is arranged in the notch 12a. The magnetic core 12 and the location where the magnetic core 12 of the bus bar 9 is arranged are integrated with the resin 15. Since the magnetic core 12 and the bus bar 9 are integrated with the resin 15, a jig for attaching the magnetic core 12 to the bus bar 9 is unnecessary, and the power conversion device 100 can be miniaturized. Further, since the plurality of bus bars 9 and the plurality of magnetic cores 12 are integrated with the resin 15, the bus bars 9 and the magnetic cores 12 can be housed inside the power conversion device 100 with easy installation work. The productivity of the power converter 100 can be improved.

<Structure of current sensor unit 14>
The current sensor unit 14 will be described. FIG. 3 is a cross-sectional view of the current sensor unit 14 cut at the AA cross-sectional position of FIG. 1 in a state where the magnetic sensor 13 is arranged in the notch portion 12a, and FIG. 4 shows the magnetic sensor 13 arranged in the notch portion 12a. It is sectional drawing of the current sensor part 14 cut at the BB sectional position of FIG. 1 in the state. 3 and 4 show the current sensor unit 14 provided on the V-phase bus bar 9b, but the current sensor unit 14 provided on the U-phase bus bar 9a and the W-phase bus bar 9c has the same configuration.

The C-shaped magnetic core 12 provided with the notch 12a is provided so as to surround the V-phase bus bar 9b. The long side of the V-phase bus bar 9b and the notch 12a of the magnetic core 12 face each other. The magnetic sensor 13 provided in the notch portion 12a is connected to the control board 7 provided so as to face the notch portion 12a. The magnetic sensor 13 is held by the support 16, and the support 16 is arranged on the control board 7. The magnetic sensor 13 is a magnetic-electric conversion element that detects the magnetic flux generated in the notch portion 12a due to the current flowing through the V-phase bus bar 9b, and is, for example, a Hall IC. The magnetic sensor 13 outputs an electric signal corresponding to the magnetic flux from the terminal of the magnetic sensor 13 connected to the control board 7 to the control board 7. The magnetic core 12 and the location where the magnetic core 12 of the V-phase bus bar 9b is arranged are integrated with the resin 15 except for the side wall portion of the magnetic core 12 including the notch 12a. The location where the resin 15 is provided to integrate the magnetic core 12 and the V-phase bus bar 9b is not limited to the locations shown in FIGS. 3 and 4, and for example, the resin 15 may be further reduced to reduce the weight. good.

Since the magnetic sensor 13 is directly connected to the control board 7 provided so as to face the notch 12a, the magnetic sensor 13 and the control board 7 can be provided close to each other, so that the power conversion device 100 can be miniaturized. can do. Further, since the magnetic core 12 and the control board 7 can be provided close to each other, the power conversion device 100 can be miniaturized. Further, since the long side of the bus bar 9 and the notch 12a of the magnetic core 12 face each other, the generation of unnecessary space around the bus bar 9 inside the magnetic core 12 is suppressed, and power conversion is performed. The device 100 can be miniaturized.

In the present embodiment, the C-shaped magnetic core 12 is used, but the shape of the magnetic core 12 is not limited to this, and may be another shape such as a circular shape or an elliptical shape.

<Comparison example>
Prior to the description of the shape of the bus bar 9, which is the main part of the present application, a comparative example will be described with reference to FIGS. 7 and 8. 7 and 8 are side views showing enlarged views of the bent portions 103 and 104 of the bus bar 102 of the power conversion device 101 of the comparative example. As shown in FIG. 2, the magnetic core 12 is arranged at a position where the bent portion 17 of the bus bar 9 is inserted, and after the magnetic core 12 is provided at the arranged position, the magnetic core 12 and the bus bar 9 are made of resin 15. Is integrated. Therefore, the magnetic core 12 must be inserted through the arrangement location before resin molding.

The dotted line shown in FIG. 7 shows a comparative example in which the bent portion 103 is provided at a right angle. When the bent portion 103 is provided at a right angle, when the magnetic core 12 approaches the bent portion 103, the open end portion 12b of the inner wall of the magnetic core 12 and the corner portion 103a of the bent portion 103 come into contact with each other. Therefore, the magnetic core 12 cannot insert the bent portion 103. It is possible to form the bent portion 103 after the magnetic core 12 is provided at the arrangement location, but since there is a risk of damaging the magnetic core 12 during the bending process, when the magnetic core 12 is bent after the magnetic core 12 is arranged. , The productivity of the power converter 100 deteriorates.

The solid line shown in FIG. 7 shows an example in which the bent portion 104 is provided in an arc shape. The alternate long and short dash line shown in FIG. 7 is a trajectory drawn by the open end portion 12b of the inner wall of the magnetic core 12 when the bent portion 104 is inserted. By forming the bend R in an arc shape, the magnetic core 12 can insert the bent portion 104. However, in order to insert the magnetic core 12, the bending R of the bent portion 104 must be increased, and the linear portion of the bus bar 102 becomes short. Assuming that the length of the linear portion in the bent portion 103 is A and the length of the linear portion in the bent portion 104 is B, A> B. When the linear portion of the bus bar 102 becomes short, for example, the length of the linear portion required when connecting the connection portion 10 of the bus bar 102 and the power terminal of the power module by TIG welding becomes insufficient. Therefore, it becomes necessary to further extend the linear portion of the bus bar 102, and as a result, the length of the bus bar 102 becomes long, the power conversion device 100 becomes large, and the cost of the power conversion device 100 increases.

The comparative example shown in FIG. 8 shows a case where the bent portion 103 is provided at a right angle and the inner diameter of the magnetic core 105 is enlarged. The broken line shown in FIG. 8 is a trajectory drawn by the open end portion 105a of the inner wall of the magnetic core 105 when the bent portion 103 is inserted. When the inner diameter of the magnetic core 105 is enlarged, the magnetic core 105 can insert the bent portion 103 even if the bent portion 103 is provided at a right angle. However, as the inner diameter of the magnetic core 105 increases, the outer diameter of the magnetic core 105 also expands, so that the magnetic core 105 becomes larger. Therefore, the power conversion device 100 becomes large. Further, since the distance between the bus bar 102 and the magnetic core 105 increases, the leakage flux increases, and the detection accuracy of the current sensor that detects the current flowing through the bus bar 102 from the magnetic flux generated in the notch portion 12a decreases.

<Shape of bus bar 9>
The shape of the bus bar 9 will be described. The bus bar 9 has a bent portion 17 on one side and one or both of the arrangement portion of the magnetic core 12, and the bent portion 17 is bent in a plurality of stages so that the magnetic core 12 can be inserted. In the present embodiment, as shown in FIG. 5, a bent portion 17 is provided on one side of the arrangement portion of the magnetic core 12. Further, in the bent portion 17, the portion 9d of the bus bar 9 on one side of the bent portion 17 and the portion 9e of the bus bar 9 on the other side of the bent portion 17 are at right angles, and the portion 9d of the bus bar 9 on one side and the other side The space between the bus bar 9 and the portion 9e is bent in two steps. The bent portions are the bent portion 17a and the bent portion 17b. A straight line is formed between the bent portion 17a and the bent portion 17b. The angle formed by the bent portion 17 and the portion 9d of the bus bar 9 on one side of the bent portion 17 is the same as the angle formed by the bent portion 17 and the portion 9e of the bus bar 9 on the other side of the bent portion 17. A connection portion 10 with a power terminal is provided on one side of the bus bar 9 via a bent portion 17 with respect to the arrangement portion of the magnetic core 12. In the present embodiment, the connection point 10 with the power terminal is provided on one side, but the present invention is not limited to this, and the connection point 10 may be provided on the other side.

The dotted line shown in FIG. 5 shows the case where the bent portion 103 is provided at a right angle, and the alternate long and short dash line shown in FIG. 5 is a locus drawn by the open end portion 12b of the inner wall of the magnetic core 12 when the bent portion 17 is inserted. be. Since the bent portion 17 is bent in a plurality of stages so that the magnetic core 12 can be inserted, the magnetic core 12 can be inserted through the bent portion 17 without increasing the inner diameter of the magnetic core 12. Further, since the bent portion 17 is not provided with a large bending R, the linear portion of the bus bar 9 is not shortened, the magnetic core 12 can be inserted through the bent portion 17, and the connection portion of the bus bar 102 is connected. The 10 and the power terminal of the power module can be easily welded. Since the linear portion of the bus bar 9 is not shortened, the length of the linear portion required when connecting the bus bar 9 and the power terminal of the power module by TIG welding is not insufficient, and the length of the bus bar 9 is not insufficient. There is no need to extend the busbar, and the power conversion device 100 does not become large and the cost of the power conversion device 100 does not increase.

Since the portion 9d of the bus bar 9 on one side and the portion 9e of the bus bar 9 on the other side are at right angles, the bus bar 9 can be miniaturized in the extending direction of the bus bar 9 at the location where the magnetic core 12 is arranged. can. Further, since the portion 9d of the bus bar 9 on one side and the portion 9e of the bus bar 9 on the other side are bent in two stages, the bending portion is the minimum configuration, and the bus bar 9 with high productivity is produced. be able to. Further, since the angle formed by the bent portion 17 and the portion 9d of the bus bar 9 on one side of the bent portion 17 is the same as the angle formed by the bent portion 17 and the portion 9e of the bus bar 9 on the other side of the bent portion 17. The magnetic core 12 can easily insert the bent portion 17. Since the connection point 10 with the power terminal is provided on one side via the bent portion 17 with respect to the place where the magnetic core 12 is arranged and is the end of the bus bar 9, the length of the bus bar 9 can be shortened. The power conversion device 100 can be miniaturized. Further, since the distance through which the magnetic core 12 is inserted to the location where the bus bar 9 is arranged is shortened, the productivity of the power conversion device 100 can be improved.

As described above, in the power conversion device 100 according to the first embodiment, the bus bar 9 provided in the power conversion device 100 has a bent portion 17 on one side of the arrangement location of the magnetic core 12, and the bent portion 17 has a plurality of stages. Since the magnetic core 12 can be inserted through the magnetic core 12, the magnetic core 12 can easily insert the bent portion 17. Further, since the bent portion 17 can be inserted through the magnetic core 12 without increasing the size of the bus bar 9 and the magnetic core 12, the power conversion device 100 can be miniaturized and reduced in cost. Further, since the magnetic core 12 and the bus bar 9 are integrated with the resin 15, a jig for attaching the magnetic core 12 to the bus bar 9 is unnecessary, and the power conversion device 100 can be miniaturized. Further, since the plurality of bus bars 9 and the plurality of magnetic cores 12 are integrated with the resin 15, the power conversion device 100 can be housed inside the power conversion device 100 with easy installation work, and the power conversion device 100 can be installed at low cost. Can be manufactured.

Further, since the magnetic sensor 13 is directly connected to the control board 7 provided so as to face the notch 12a, the magnetic sensor 13 and the control board 7 are close to each other, and the magnetic sensor 13 and the control board 7 are separated from each other. The power conversion device 100 can be miniaturized without using wiring. Further, since the long side of the bus bar 9 and the notch portion 12a of the magnetic material core 12 face each other, the generation of unnecessary space around the bus bar 9 inside the magnetic material core 12 is suppressed, and the magnetic material is suppressed. The thickness of the core 12 is reduced, and the power conversion device 100 can be miniaturized.

Embodiment 2.
The power conversion device 100 according to the second embodiment will be described. FIG. 6 is a cross-sectional view of the bus bar 9 and the magnetic core 12 of the power conversion device 100 according to the second embodiment. The power conversion device 100 according to the second embodiment has a configuration in which the bus bar 9 includes two bent portions 17.

The bus bar 9 has a bent portion 17 on both one side and the other side of the arrangement portion of the magnetic core 12, and the bent portion 17 is bent in a plurality of stages so that the magnetic core 12 can be inserted. The bent portion 17 is bent in two steps as in the first embodiment, but the bending step is not limited to the two steps. For example, a further bent portion may be provided in the center of the bent portion. By providing a minute bent portion in the center, the distance between the locus shown by the alternate long and short dash line in FIG. 5 and the bent portion 17 facing the locus becomes more even, so that the magnetic core 12 makes the bent portion 17 easier. Can be inserted into. Further, the bus bar 9 may be further provided with a bent portion 17.

As described above, in the power conversion device 100 according to the second embodiment, the bus bar 9 provided in the power conversion device 100 has bent portions 17 on both one side and the other side of the arrangement location of the magnetic core 12, and is bent. Since the portion 17 is bent in a plurality of stages so that the magnetic core 12 can be inserted, the magnetic core 12 can be arranged at the arrangement location of the magnetic core 12 from both sides of the bus bar 9. Since the magnetic cores 12 can be arranged from both sides of the bus bar 9, the degree of freedom of production of the power conversion device 100 can be improved and the productivity can be improved, so that the power conversion device 100 can be manufactured at low cost.

The present application also describes various exemplary embodiments and examples, although the various features, embodiments, and functions described in one or more embodiments are those of a particular embodiment. It is not limited to application, but can be applied to embodiments alone or in various combinations.
Therefore, innumerable variations not illustrated are envisioned within the scope of the techniques disclosed herein. For example, it is assumed that at least one component is modified, added or omitted, and further, at least one component is extracted and combined with the components of other embodiments.

1 Smoothing capacitor, 1a P busbar, 1b N busbar, 2 power module, 2a input terminal P, 2b input terminal N, 2c U-phase terminal, 2d signal terminal, 3 power module, 3a input terminal P, 3b input terminal N, 3c V-phase terminal, 3d signal terminal, 4 power module, 4a input terminal P, 4b input terminal N, 4c W-phase terminal, 4d signal terminal, 5 heat sink, 5a mounting surface, 6 base, 7 control board, 8 PN terminal block, 9 busbar, 9a U-phase busbar, 9b V-phase busbar, 9c W-phase busbar, 9d part, 9e part, 10 connection part, 10a welded part, 11 fastening part, 11a fastening hole, 12 magnetic core, 12a notch, 12b Open end, 13 Magnetic sensor, 14 Current sensor, 15 Resin, 16 Support, 17 Bending part, 17a Bending part, 17b Bending part, 100 Power converter, 101 Power converter, 102 Busbar, 103 Bending part, 103a Corners, 104 bends, 105 magnetic cores, 105a open ends

Claims (5)

A power module that converts power and
A plate-shaped bus bar connected to the power terminal of the power module,
It is provided with a magnetic core that surrounds the bus bar in a tubular shape and has a notch.
The bus bar has bent portions on one side and one or both of the placement locations of the magnetic core.
The bent portion allows the magnetic core to be inserted through the bent portion, and the plate surface of the bus bar portion on one side of the bent portion and the plate surface of the bus bar portion on the other side of the bent portion are at right angles to each other. The plate surface between the busbar portion on the side and the busbar portion on the other side is bent in two steps.
On one side or the other side of the bus bar via the bent portion with respect to the arrangement location of the magnetic core, the connection portion with the power terminal facing the power terminal having the same shape as the power terminal is linear. Provided in
A power conversion device in which the connection point and the power terminal are connected via a welded portion. The first aspect of claim 1, wherein the angle formed by the bent portion and the bus bar portion on one side of the bent portion is the same as the angle formed by the bent portion and the bus bar portion on the other side of the bent portion. Power converter. The power conversion device according to claim 1 , wherein the magnetic core and a location where the magnetic core of the bus bar is arranged are integrated with a resin. A control board having a circuit for controlling the operation of the power module is provided.
The power according to any one of claims 1 to 3 , wherein the magnetic sensor provided in the notch portion of the magnetic core is connected to the control board provided so as to face the notch portion. Conversion device. The power conversion device according to claim 4 , wherein the long side of the bus bar and the notch portion of the magnetic core face each other.

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