The embodiment of the invention belongs to the field of new energy automobiles, and particularly relates to a motor controller with a fault isolation function, a power assembly and an electric vehicle. The motor controller comprises an inverter circuit and a control circuit, the inverter circuit comprises three phases of bridge arms, each phase of bridge arm comprises an upper bridge arm switch tube and a lower bridge arm switch tube, and the middle point of each phase of bridge arm is used for being connected with a phase winding of a driving motor through a switch module. And the control circuit is used for controlling the switch module corresponding to each phase of bridge arm to be closed and controlling the bridge arm midpoint of each phase of bridge arm to output current to one phase of winding of the driving motor. In the current output process of the inverter circuit, the control circuit responds to short circuit of the upper bridge arm switch tube or the lower bridge arm switch tube of at least one phase of bridge arm and controls the switch module corresponding to the at least one phase of bridge arm to be switched off. By adopting the method and the device, the output torque of the driving motor can be continuously controlled after any phase of bridge arm in the motor controller has a short-circuit fault, so that the driving safety can be improved.
本申请公开的实施例属于新能源汽车领域,特别涉及一种具有故障隔离功能的电机控制器、动力总成及电动车辆。其中,该电机控制器包括逆变电路和控制电路,逆变电路包括三相桥臂,每相桥臂包括上桥臂开关管和下桥臂开关管,每相桥臂的桥臂中点用于通过一个开关模块连接驱动电机的一相绕组。控制电路用于控制每相桥臂对应的开关模块闭合,并控制每相桥臂的桥臂中点向驱动电机的一相绕组输出电流。在逆变电路输出电流的过程中,控制电路响应于至少一相桥臂的上桥臂开关管或下桥臂开关管短路,控制该至少一相桥臂对应的开关模块断开。采用本申请,可以在电机控制器中的任一相桥臂出现短路故障后,继续控制驱动电机输出扭矩,能够提高行车安全性。
Motor controller with short circuit isolation function, power assembly and electric vehicle
具有短路隔离功能的电机控制器、动力总成及电动车辆
03.05.2024
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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