双三相电机低边电阻电流采样重构技术研究

Low-Side Resistance Current Sampling and Reconstruction Technology of Dual Three-Phase Motor

双三相电机驱动系统具有容错能力强、易实现低压大功率运行等优点,在电动汽车领域具有广阔的应用前景。汽车行业对成本极其敏感,为了降低系统成本,论文研究了双三相电机低边电阻电流采样重构技术。这种方法利用零矢量作用时流经下桥臂的电流对相电流进行重构,在硬件上大大简化,降低了成本,适用于低压系统。文中对该算法进行了失效区分析,并通过仿真验证了在算法适用范围内的重构效果。

Dual three-phase motor drive system gets more and more attention with many advantages such as strong fault tolerance,easy to achieve high power with low voltage.The automotive industry is extremely sensitive to costs.In order to reduce the cost,the paper studies the low-side resistance current sampling and reconstruction technology of dual three-phase motor.By the current sampling resistor in the lower ann of the inverter,the phase currents are reconstructed by the currents flowing through the lower arm when adopting the zero vector.In this paper,the failure zone of this method is analyzed,and the effect of reconstruction is verified.