The invention relates to a method for weakening impact current in a failure mode of a motor controller, the method is based on the following circuit structure including a power battery, the motor controller, a motor, a battery heater and an electric defrosting heater are included, the positive electrode and the negative electrode of the power battery are connected with the positive electrode and the negative electrode of the motor controller respectively, the three-phase alternating-current end of the motor controller is connected with the three-phase alternating-current end of the motor; thepositive electrode end of the battery heater is connected with the positive electrode of the power battery through a battery heater relay K2, and the positive electrode end of the electric defrostingheater is connected with the positive electrode of the power battery through an electric defrosting heater relay K1. The method comprises the following steps: 1, signal acquisition; 2, failure judgment; 3, judging the vehicle speed; and 4, weakening the impact current. According to the design, the impact current can be weakened in the failure mode of the motor controller, and the impact of the feedback current on the battery is further reduced by utilizing high-frequency on-off.
一种电机控制器失效模式下削弱冲击电流的方法,所述削弱冲击电流的方法基于如下电路结构:包括动力电池、电机控制器、电机、电池加热器和电除霜加热器,所述动力电池的正、负极与电机控制器的正、负极相连接,所述电机控制器三相交流端与电机的三相交流端相连接;所述电池加热器的正极端通过电池加热器继电器K2与动力电池的正极相连接,所述电除霜加热器的正极端通过电除霜加热器继电器K1与动力电池的正极相连接;所述方法包括以下步骤:第一步,信号采集;第二步,失效判定;第三步,车速判定;第四步,冲击电流削弱。本设计不仅能够在电机控制器失效模式下削弱冲击电流,而且利用高频通断进一步减小回馈电流对电池的冲击。
Method for weakening impact current in failure mode of motor controller
一种电机控制器失效模式下削弱冲击电流的方法
02.02.2021
Patent
Elektronische Ressource
Chinesisch
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen |
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