JP6291868B2 - Inverter wiring structure - Google Patents

Description

  The present invention relates to an inverter wiring structure, and more particularly to an inverter wiring structure for controlling electric power of a vehicle equipped with a traveling electric motor.

In vehicles that run on an electric motor, it is known that an electric motor is connected to a high voltage battery via an inverter via a high voltage line, and the current of the high voltage battery is converted from direct current to alternating current by the inverter and supplied to the electric motor. It has been. In addition, the inverter is provided with a motor control device that adjusts the power supplied to the electric motor, and an electronic circuit for converting a current is disposed therein.
The inverter is also connected to a low voltage battery by a low voltage line that supplies power to the motor controller and the electronic circuit. The motor control device is configured to operate with electric power supplied from a low-voltage battery and adjust electric power supplied to the electric motor. The electronic circuit operates with electric power supplied from the low-voltage battery, converts the current of the high-voltage battery into alternating current, and supplies it to the electric motor.

  As for the wiring structure of the inverter to which the high voltage line and the low voltage line are connected, a structure as disclosed in Patent Document 1 is disclosed. In Patent Document 1, the position to which the low voltage line of the inverter is connected is set to the opposite side, the adjacent side, or the farthest position on the same side with respect to the position to which the high voltage line is connected. A structure in which noise interference from a high voltage line to a low voltage line is suppressed is disclosed.

JP 2009-89511 A

By the way, when the low voltage line and the high voltage line are connected to the inverter, there is a problem that the voltage of the power flowing through the low voltage line is affected by electromagnetic influence of the high voltage line and fluctuates.
In Patent Document 1, when the low voltage line and the high voltage line are connected to the same side surface of the inverter, the noise interference is suppressed by connecting the low voltage line and the high voltage line to the farthest positions. A structure is disclosed.
However, in Patent Document 1, since the low voltage line and the high voltage line are extended from the same side surface of the inverter in the direction parallel to each other, the electromagnetic influence on the low voltage line due to the voltage of the power flowing through the high voltage line is reduced. There was a problem that could not be sufficiently suppressed.

  Accordingly, the present invention has been made in view of the above problems, and provides an inverter wiring structure that can sufficiently suppress the influence of voltage fluctuations on a low-voltage line and reduce noise generation. For the purpose.

The present invention relates to a wiring structure of an inverter arranged in an engine room of a vehicle, and is connected to a main electric wire extending in the front-rear direction on at least one of the left and right sides of the engine room and a side surface of the inverter on the main electric wire side. A low-voltage line, a high-voltage line connected to the side surface, and a high-voltage battery connected to the high-voltage line, and the high-voltage line is connected to a side surface of the inverter on the main electrical wire side A high voltage line connection port and a low voltage line connection port to which the low voltage line is connected are provided, the high voltage line connection port is disposed on the high voltage battery side from the low voltage line connection port, A connector is provided between the high-voltage line and the high-voltage line connection port, and an outlet for taking out the high-voltage line from the connector is different from the side surface provided with the low-voltage line connection port. Co The low voltage line connected to the low voltage line connection port is extended to the left and right sides, and the high voltage line taken out from the extraction port is directed downward perpendicular to the low voltage line. After being extended, it is curved and extends rearward .

  In the present invention, even when a low voltage line is connected to the side of the main cable side of the inverter that can shorten the length of the electric wire and a high voltage line is connected to the same side, the high voltage line is low. Since it is connected so as to extend in a direction orthogonal to the voltage line, the electromagnetic influence on the low voltage line by the high voltage line can be sufficiently suppressed, and the generation of noise can be reduced.

FIG. 1 is a plan view of a vehicle engine room showing an arrangement state of inverters. (Example) FIG. 2 is a schematic diagram showing the connection state of the inverter. (Example) FIG. 3 is a perspective view of the inverter viewed from the left front of the vehicle. (Example) FIG. 4 is a perspective view of the inverter viewed from the left rear of the vehicle. (Example)

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

1 to 4 show an embodiment of the present invention. In FIG. 1, a vehicle 1 is provided with an engine room 6 surrounded by left and right side panels 3 and 4 and a front front grill 5 on the front side of a dash panel 2. Headlights 7 and 8 are arranged at the left and right ends of the front grill 5. In the engine room 6, a traveling engine 9 and an electric motor 10 are arranged, a high voltage battery 11 for storing high voltage power supplied to the electric motor 10 is arranged, and the current of the high voltage battery 11 is changed from direct current. An inverter 12 that converts to alternating current and supplies the electric motor 10 is disposed.
The engine 9 is disposed on the right front side of the engine room 6. The electric motor 10 is connected to the left side of the engine 9 and is arranged on the center front side of the engine room 6. The high voltage battery 11 is arranged on the left rear side of the engine room 6. The inverter 12 is disposed on the left side of the electric motor 10 and on the front side of the high voltage battery 11 and on the left side of the engine room 6 in the front-rear direction center. The electric motor 10 and the inverter 12 are connected by a high voltage line 13. The high voltage battery 11 and the inverter 12 are connected by a high voltage line 14.
The inverter 12 is formed in a substantially square box shape having four side surfaces 15 to 18. The inverter 12 is disposed on the left side of the engine room 6 with the side surfaces 15 and 16 facing in the front-rear direction and the side surfaces 17 and 18 facing in the left-right direction, respectively. The inverter 12 is provided with a motor control device 19 that adjusts the power supplied to the electric motor 10, and an electronic circuit 20 that converts a current is disposed therein.

Further, in the engine room 6, a main electric wire 21 extending in the front-rear direction is disposed at least one of the left and right sides, in FIG. The main electrical wire 21 extends through the dash panel 2 and is connected to the low voltage battery 22. The high voltage battery 11 supplies power to the electric motor 10 via the inverter 12. The high voltage battery 11 here is not a low voltage (12 V) type battery used for the headlights 7, 8 or the like, but a high voltage (100 V or 200 V) type battery. The low voltage battery 22 supplies power to the motor control device 19 and the electronic circuit 20.
The main electric wire 21 is connected to the inverter 12 by a low voltage line 23. The inverter 12 is connected to the electric motor 10 by a low voltage line 24. The control device 19 disposed in the inverter 12 operates with the power supplied from the low voltage battery 22 through the low voltage line 23 and adjusts the power supplied to the electric motor 10. The electronic circuit 20 of the inverter 12 operates with electric power supplied from the low voltage battery 22, converts the current of the high voltage battery 11 into alternating current, and supplies the alternating current to the electric motor 10. The drive of the electric motor 10 is controlled by a signal from the low voltage line 24.
In addition, when performing regenerative power generation control, the electric motor 10 is used as a generator, the alternating current generated by the electric motor 10 is supplied to the inverter 10 through the high voltage line 13, and converted into direct current by the electronic circuit 20, The high voltage line 14 may supply the high voltage battery 11.
Further, as shown in FIG. 2, the vehicle 1 is mounted with another control device 25 such as a vehicle control device or an engine control device. The vehicle control device detects the slip state of the tire of the vehicle 1, the remaining amount of the high voltage battery 11, the low voltage battery 22, and the like. The engine control device controls the output of the engine 9 according to the accelerator depression amount and the like. The motor control device 19 communicates with such another control device 25 through the communication line 26, and controls the electric motor 10 according to the traveling state.

As shown in FIGS. 3 and 4, the inverter 12 includes a stepped surface 27 facing upward in the middle of the rear side surface 16. The step surface 27 is provided with a high voltage line connection port 28 for connecting the high voltage line 13. The high voltage line 13 connected to the high voltage line connection port 28 of the stepped surface 27 extends upward and then to the right, and is connected to the electric motor 10 disposed to the right of the inverter 12.
On the side surface 17 facing the main power cable 21 on the left side of the inverter 12, a high voltage line connection port 29 to which the high voltage line 14 is connected and a low voltage line connection port 30 to which the low voltage line 23 is connected are provided. I have. The high voltage line connection port 29 is disposed on the high voltage battery 11 side behind the low voltage line connection port 30. A connector 31 provided on the high voltage line 14 is connected to the high voltage line connection port 29. The connector 31 is formed in a substantially rectangular parallelepiped shape, and includes an outlet 33 for taking out the high voltage wire 14 on one side 32. The connector 31 is connected so as to cover the high voltage line connection port 29 on the side surface 17. One side surface 32 of the connector 31 connected to the high voltage line connection port 29 is arranged in a state of facing downward in a different direction with respect to the side surface 17 facing leftward of the inverter 12. The high voltage line 14 extending downward is taken out from the outlet 33 of the side surface 32 facing downward.
The high voltage line 14 is taken out downward from an outlet 33 on the side surface 32 of the connector 31 connected to the high voltage line connection port 29 on the side surface 17 of the inverter 12. The high voltage line 14 taken downward from the take-out port 33 is curved and extended to the rear side, and is connected to the high voltage battery 11 disposed on the rear side of the inverter 12.
A low voltage line connection port 30 is disposed in front of the high voltage line connection port 29 on the side surface 17 facing the main electrical wire 21 on the left side of the inverter 12. The low voltage line 23 connected to the low voltage line connection port 30 on the side surface 17 extends to the left and is connected to the main electric wire 21 disposed on the left side of the inverter 12. The outlet 33 of the high voltage line 11 is provided on the side 32 facing downward of the connector 31 so as to be lower than the low voltage line connection port 30 to which the low voltage line 23 is connected.
A low voltage line connection port 34 to which the low voltage line 24 is connected is provided on the side surface 18 facing the electric motor 10 on the right side of the inverter 12. The low voltage line 24 connected to the low voltage line connection port 34 on the side surface 18 extends rightward and is disposed on the center front side of the engine room 6 and connected to the electric motor 10.

The wiring structure of the inverter 12 includes a main electric wire 21 extending in the front-rear direction on the left side of the engine room 6, and is connected to the front side of the side surface 17 on the main electric wire 21 side of the inverter 12 and extends to the left. 23, and a high voltage line 14 connected to the rear side of the side face 17 and extending downward perpendicular to the low voltage line 23 and then curved and extended to the rear side.
The inverter 12 includes a main electric wire 21 on the left side of the engine room 6, and includes a low voltage line 23 connected to the side surface 17 on the main electric wire 21 side of the inverter 12 and extending to the left to be connected to the main electric wire 21. The length of the low voltage line 23 connected to the main electrical wire 21 can be shortened.
In this way, when the low voltage line 23 is connected to the side surface 17 on the main cable 21 side of the inverter 12 and the high voltage line 14 is connected to the side surface 17, the length of the low voltage line 23 can be shortened. Even in such a case, since the high voltage line 14 is connected so as to extend in a direction perpendicular to the low voltage line 23, the electromagnetic influence on the low voltage line 23 by the high voltage line 14 is sufficiently suppressed, and noise is reduced. Can be reduced.

Further, the wiring structure of the inverter 12 includes a high voltage battery 11 connected to the high voltage line 14, and a high voltage line connection port 29 and a low voltage line connection port 30 are provided on the side surface 17 of the inverter 12 on the main cable 21 side. Is provided, and the high voltage line connection port 29 of the high voltage line 14 is arranged closer to the high voltage battery 11 than the low voltage line connection port 30 of the low voltage line 23. A connector 31 is provided between the high voltage line 14 and a high voltage line connection port 29 provided on the side surface 17 of the inverter 12. The outlet 33 for taking out the high voltage line 14 from the connector 31 has a side surface 32 of the connector 31 in a direction (downward) different from the direction ( left side ) of the side surface 17 where the low voltage line connection port 30 of the low voltage line 23 is provided. Is provided.
In this way, the high voltage line connection port 29 of the high voltage line 14 is arranged away from the low voltage line connection port 30 of the low voltage line 23, and the high voltage line connection port 29 is covered by the connector 31, so that the high voltage line 14 Since the take-out port 33 is provided on the side surface 32 in a direction different from the direction of the low voltage line connection port 30 of the low voltage line 23, the electronic influence of the high voltage line 14 on the low voltage line 23 can be suppressed.

Further, the wiring structure of the inverter 12 is such that the outlet 33 of the high voltage line 14 is located below the low voltage line connection port 30 between the inverter 12 and the low voltage line 23 on the side surface 32 facing downward of the connector 31. It is provided as follows.
Thereby, the high voltage line 14 can be prevented from crossing the low voltage line 23 when the inverter 12 is viewed in the front-rear direction, and the electromagnetic influence of the high voltage line 14 on the low voltage line 23 can be reduced.

  The present invention can sufficiently suppress the influence of voltage fluctuation on the low voltage line due to the high voltage line, and can reduce the generation of noise. The high voltage line and the low voltage line are not limited to vehicles. The present invention can be applied to electric devices that are arranged close to each other.

DESCRIPTION OF SYMBOLS 1 Vehicle 6 Engine room 9 Engine 10 Electric motor 11 High voltage battery 12 Inverter 13 High voltage line 14 High voltage line 15-18 Side surface of the inverter 12 19 Motor controller 20 Electronic circuit 21 Main electric wire 22 Low voltage battery 23 Low voltage line 24 Low voltage line 25 Other control device 26 Communication line 27 Stepped surface 28 High voltage line connection port 29 High voltage line connection port 30 Low voltage line connection port 31 Connector 32 Downward side surface of connector 31 33 Outlet port 34 Low voltage line connection port

Claims (2)

In the wiring structure of the inverter arranged in the engine room of the vehicle,
At least one of the left and right sides of the engine room, a main wire extending in the front-rear direction,
A low voltage line connected to a side surface of the inverter on the main electrical wire side;
A high-voltage line connected to the side surface ;
A high voltage battery connected to the high voltage line ,
A high voltage line connection port to which the high voltage line is connected and a low voltage line connection port to which the low voltage line is connected are provided on the side of the main electric wire side of the inverter,
The high voltage line connection port is disposed on the high voltage battery side from the low voltage line connection port,
The high voltage line is provided with a connector between the high voltage line connection port,
The outlet for taking out the high-voltage line from the connector is provided on the side surface of the connector facing downward different from the side surface provided with the low-voltage line connection port,
The low voltage line connected to the low voltage line connection port is extended to the left or right side,
The wiring structure of an inverter, wherein the high voltage line taken out from the take-out port is extended downward downward perpendicular to the low voltage line and then curved and extended to the rear side . 2. The inverter according to claim 1, wherein the extraction port is provided on a side surface facing the lower side of the connector so as to be lower than a connection port of the low voltage line provided on the side surface of the inverter. Wiring structure.

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