基于切换系统理论的异步电机最优直接转矩控制

提出一种系统建模和控制策略来实现两电平异步电机最优直接转矩控制来改善传统直接转矩控制存在的磁链和转矩脉动较大的问题。首先,基于切换系统理论建立两电平异步电机传动系统模型,然后在切换模型基础上,建立一个约束条件的有限时间最优控制目标函数,并利用滚动优化策略求解目标函数来实现最优直接转矩控制。仿真结果表明,该方法能够有效减少磁链和转矩脉动,降低逆变器开关频率,具有良好的动、静态性能。

Optimal Direct Torque Control of Induction Motors Based on Switching Systems Theory

In this paper, a systematic modeling and control approach for a two-level inverter fed three-phase induction motor is presented to reduce the pulsations of torque and flux in the direct torque control （DTC）. The induction motor drives is modeled in the framework of the switched system, and a constrained optimal control problem is solved over a finite receding horizon by using the model predictive control MPC）. Simulation results are provided and demonstrate the potential for performance improvements.