The invention discloses a multi-stage active discharge system and method for a high-voltage bus capacitor of an electric vehicle. The system comprises a general active discharge loop, an emergency discharge loop, and a vehicle control unit, wherein the vehicle control unit controls the work of the general active discharge loop and the emergency discharge loop after the vehicle is powered off so asto complete the discharge control of the high-voltage bus capacitor, grading control is realized through three stages of active discharge loops, namely a DC/DC active discharge loop, a PTC controlleractive discharge loop and an inverter active discharge loop, and the inverter active discharge loop is immediately switched when active discharge timeout faults of the DC/DC and PTC controllers occur, so that active discharge failure caused by failure of a single discharge loop is avoided, and the safety and reliability of active discharge are greatly improved.
本发明公开了一种电动汽车高压母线电容的多级主动放电系统及方法,其中系统包括一般主动放电回路、紧急放电回路、整车控制器,所述整车控制器在车辆下电后控制一般主动放电回路、紧急放电回路的工作从而完成对高压母线电容的放电控制。通过三级主动放电回路即DC/DC主动放电回路、PTC控制器主动放电回路和逆变器主动放电回路,实现分级控制,在DC/DC和PTC控制器主动放电超时故障时立即切换逆变器主动放电回路,避免了单个放电回路失效而造成主动放电失效,大大提高了主动放电的安全性和可靠性。
Multi-stage active discharge system and method for high-voltage bus capacitor of electric vehicle
电动汽车高压母线电容的多级主动放电系统及方法
11.12.2020
Patent
Elektronische Ressource
Chinesisch
IPC: | H02M APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS , Anlagen zur Umformung von Wechselstrom in Wechselstrom, von Wechselstrom in Gleichstrom oder umgekehrt, oder von Gleichstrom in Gleichstrom und zur Verwendung in Netzen oder ähnlichen Stromversorgungssystemen / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR / H02P CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS , Steuern oder Regeln von elektrischen Motoren, elektrischen Generatoren, dynamoelektrischen Umformern / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen |
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