The invention discloses an active short-circuit protection method for a motor, a motor controller and a motor control system. The method comprises steps that power switching devices of an upper bridgearm and a lower bridge arm in an inverter are controlled to be alternately switched on under the condition that a flag bit of active short-circuit protection is effective; wherein the zone bit of theactive short-circuit protection is a zone bit which is generated after a motor fault occurs and is used for indicating whether the active short-circuit protection needs to be implemented or not. Whenthe zone bit of the active short circuit protection is effective, the power switch devices of the upper and lower bridge arms in the inverter are controlled to be switched on alternately, so the power switch devices of the upper bridge arm are prevented from being fully switched on, the power switch devices of the lower bridge arm are prevented from being fully switched off, or when the power switch devices of the upper bridge arm are fully switched off and the power switch devices of the lower bridge arm are fully switched on, great impact is caused to the power switch device on the openingside so that the service life of the power switch device is influenced; and the current-withstanding and heat balancing capabilities of the power switching devices of the upper and lower bridge arms are balanced when the active short-circuit protection function is started.
本申请公开一种电机的主动短路保护方法、电机控制器以及电机控制系统,所述方法包括:在主动短路保护的标志位有效的情形下,控制逆变器中上下桥臂的功率开关器件交替导通;其中,主动短路保护的标志位,是指在出现电机故障后生成的用以标示是否需要实施主动短路保护的标志位。本申请在主动短路保护的标志位有效时控制逆变器中上下桥臂的功率开关器件交替导通,避免了上桥臂的功率开关器件全打开、下桥臂的功率开关器件全关断,或者上桥臂的功率开关器件全关断、下桥臂的功率开关器件全打开时,对开通一侧的功率开关器件造成很大的冲击,进而影响功率开关器件寿命的问题;均衡了主动短路保护功能开启时上下桥臂的功率开关器件的的耐流和热均衡能力。
Active short-circuit protection method of motor, controller and motor control system
电机的主动短路保护方法、控制器以及电机控制系统
2021-03-30
Patent
Electronic Resource
Chinese
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / 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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