两电机转矩同步系统有限集模型预测控制

Finite Control Set Model Predictive Control for Dual-Motor Torque Synchronous Sysetm

首先分析了基于转矩跟随结构的两电机转矩同步控制系统,针对传统结构中同步误差开环控制的问题,通过推导同步误差变化率的影响因素,提出了一种基于统一预测模型的两电机转矩同步有限集模型预测控制策略。通过对两电机同步系统进行统一建模,将电机之间的q轴电流同步误差作为统一预测模型的一个状态变量,从预测控制的角度对同步误差实现闭环控制,使同步误差参与逆变器开关状态选择。最后,实验证明了所提控制策略能够实现系统的转矩同步控制。

On the basis of torque following topology, the general dual-motor torque synchronous control system is analyzed. In traditional algorithms, the torque error is controlled in the open loop. Factors which have effects on synchronous error ratio are analyzed by formula derivation. Then a novel torque synchronous control finite control set model predictive control（FCS-MPC） algorithm based on the unified predictive model for dual- motor system is proposed. The q-axis current synchronous error between two motors is taken as a state variable and closed-loop controlled in the predictive point of view. In this way, the synchronous error is allowed to participate in switching state selection. The experimental results show that the proposed algorithm can achieve torque synchronous control.