The invention relates to a system and method for protecting an inverter in vehicle from overvoltage. The system for protecting an inverter in a vehicle from an overvoltage may include an inverter including a plurality of switching elements and converting energy supplied from an energy storage into AC power, a motor driven by the AC power converted by the inverter, a capacitor connected in parallel between the inverter and the energy storage and storing regenerative energy of the motor during regenerative braking, and a controller turning off a relay that connects the energy storage and the motor, when a voltage (DC-link voltage) of the capacitor measured by a voltage sensor is equal to or greater than a preset first voltage, and operating the switching elements in the inverter in response to a pre-stored current command (Id*, Iq*) to apply a zero vector to the motor.
本发明涉及用于保护车辆中的逆变器免受过电压的系统和方法。一种用于保护车辆中的逆变器免受过电压的系统可以包括:逆变器,其包括多个开关元件,并将从储能器供应的能量转换为交流电;电机,其由经逆变器转换的交流电来驱动;电容器,其并联在逆变器和储能器之间,在再生制动期间存储电机的再生能量;以及控制器,当电压传感器测量的电容器的电压(DC母线电压)等于或大于预设的第一电压时,使连接储能器和电机的继电器断开,并响应于预先存储的向电机施加零矢量的电流指令(Id*,Iq*)而操作逆变器中的开关元件。
SYSTEM AND METHOD FOR PROTECTING INVERTER IN VEHICLE FROM OVERVOLTAGE
用于保护车辆中的逆变器免受过电压的系统和方法
19.10.2021
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 / 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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