The invention provides an electrical isolation circuit of a motor controller, which comprises an isolation power supply, an isolation CAN chip, a digital signal isolation optocoupler, a main control chip, a power switch, a motor, a pre-isolation CAN signal, a post-isolation CAN signal, a pre-isolation digital signal and a post-isolation digital signal, wherein the pre-isolation CAN signal is connected with the isolation CAN chip and a primary side of the isolation power supply, and the post-isolation CAN signal is connected with the isolation CAN chip and the secondary side of the isolation power supply; the pre-isolation digital signal is connected with the primary side of the isolation power supply and the digital signal isolation optocoupler, and the post-isolation digital signal is connected with the secondary side of the isolation power supply and the digital signal isolation optical coupler; the secondary side of the isolation power supply is connected with the main control chip and the power switch. The input end power supply, the CAN chip and the digital signal optocoupler are electrically isolated, and the isolated digital signal optocoupler, the master control chip, the power ground/power ground and the analog signal ground are all in common ground with the secondary side of the isolation power supply.
本发明提供一种电机控制器的电气隔离电路,其包括隔离电源、隔离CAN芯片、数字信号隔离光耦、主控芯片、电源开关以及电机、隔离前CAN信号、隔离后CAN信号、隔离前数字信号和隔离后数字信号,其中,隔离前CAN信号连接所述隔离CAN芯片和隔离电源的一次侧,隔离后CAN信号连接所述隔离CAN芯片和隔离电源的二次侧;隔离前数字信号连接所述隔离电源的一次侧和数字信号隔离光耦,隔离后数字信号连接所述隔离电源的二次侧和数字信号隔离光耦;隔离电源的二次侧均与主控芯片和电源开关连接。本发明通过将输入端电源、CAN芯片、数字信号光耦进行电气隔离,隔离后的数字信号光耦、主控芯片、功率地/动力地以及模拟信号的地均与隔离电源的二次侧共地。
Electrical isolation circuit of motor controller
一种电机控制器的电气隔离电路
2021-11-02
Patent
Electronic Resource
Chinese
IPC: | H02K Dynamoelektrische Maschinen , DYNAMO-ELECTRIC MACHINES / B62M RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES , Antrieb von Radfahrzeugen oder Schlitten durch den Fahrer / H02P CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS , Steuern oder Regeln von elektrischen Motoren, elektrischen Generatoren, dynamoelektrischen Umformern |
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