基于MPC的五桥臂双电机公共桥臂电流抑制方法

基于模型预测控制的五桥臂逆变器存在公共桥臂电流过大的问题，以五桥臂逆变器下的双永磁同步电机系统为研究对象，在模型预测控制策略的基础上对公共桥臂电流抑制方法展开研究。结合五桥臂双永磁同步电机系统的拓扑结构以及模型预测控制策略的算法架构，探讨了公共桥臂对应的两相电流相位差对其电流的影响，将基于转子磁链角度差的公共桥臂电流抑制方法应用于模型预测控制策略中，并对电流抑制效果进行实验验证和量化评估。实验结果表明，在均衡负载以及不均衡负载情况下，基于模型预测控制策略的公共桥臂电流抑制算法均能够实现较好的电流抑制效果。

Common leg current suppression method for dual motors driven by a five-leg inverter based on MPC

A five-leg inverter based on model predictive control (MPC) strategy has a problem of excessive common leg current. This paper takes the dual permanent magnet synchronous motor (dual PMSM) system driven by a five leg inverter as the research object, and a common leg current suppression method on the basis of MPC strategy is studied. Combined with the topology of five leg dual PMSM system and the algorithm architecture of MPC strategy, the influence of the phase difference of two phase current corresponding to common leg on common leg current is discussed. The common leg current suppression method based on the rotor flux linkage angle difference is applied to MPC strategy, and corresponding experiments are carried out so as to verify and evaluated current suppression effect. Experimental results show that the common leg current suppression algorithm based on MPC strategy can achieve a fine control effect whether under the balanced load or not.