The invention relates to a high-voltage redundant discharge device of a vehicle-mounted motor controller, which comprises an isolation transformer, a low-voltage output point, a high-voltage active discharge branch and an anti-reflux diode, and is characterized in that a primary side coil of the isolation transformer is connected to a high-voltage bus, and a secondary side coil is connected to an input end of the high-voltage active discharge branch through the low-voltage output point; the low-voltage power supply is connected to the motor controller through an anti-countercurrent diode, the positive electrode of the anti-countercurrent diode is connected to the low-voltage output point, the negative electrode of the anti-countercurrent diode is connected to the positive electrode of the low-voltage power supply of the motor controller, and the high-voltage bus is connected with a bus capacitor. Compared with the prior art, the high-voltage active discharge branch is moved from the high-voltage side to the low-voltage side, the isolation transformer is used for transmitting electric energy, and the high-voltage bus is discharged on the low-voltage side, so that the high-voltage active discharge branch is arranged on the low-voltage side, on one hand, the number and cost of components can be reduced, and on the other hand, the cost is reduced. And a relatively large high-voltage safety distance does not need to be considered on the low-voltage side, so that the size of the PCB can be effectively utilized and reduced.
本发明涉及一种车载电机控制器的高压冗余放电装置,包括隔离变压器、低压输出点、高压主动放电支路和防逆流二极管,隔离变压器的原边线圈连接至高压母线,副边线圈通过低压输出点连接至高压主动放电支路的输入端,以及通过防逆流二极管连接至电机控制器的低压电源,其中,防逆流二极管的正极连接至低压输出点,负极连接至电机控制器的低压电源的正极,高压母线上连接有母线电容。与现有技术相比,本发明通过将高压主动放电支路从高压侧移动至低压侧,利用隔离变压器传输电能,在低压侧对高压母线进行放电,从而高压主动放电支路在低压侧,一方面,可以减少元器件数量和成本,另一方面,低压侧不需要考虑较大的高压安规距离,更能有效利用和缩小PCB的尺寸。
High-voltage redundant discharge device of vehicle-mounted motor controller
一种车载电机控制器的高压冗余放电装置
2025-01-10
Patent
Electronic Resource
Chinese
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen |
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