基于矩阵变换器的异步电机预测控制方法研究

Research on Predictive Control Method of Asynchronous Motor Based on Matrix Converter

为了既能实现电源输入功率因数为1,又能实现异步电机定子电流的转矩分量和励磁分量的解耦控制,研究将矩阵变换器的预测控制与异步电机转子磁场定向矢量控制相结合的组合控制策略。结合转子磁场定向技术,采用转速和磁链的双闭环结构,并对异步电机定子电流和无功功率进行多目标预测控制。仿真结果表明,该方法既保留了传统异步电机转子磁场定向矢量控制的优点,又发挥了预测控制的长处。实现了输入功率因数为1,改善了电源质量;实现了异步电机定子电流转矩分量和励磁分量的解耦控制,改善了调速系统动态性能。

In order to get unit input power factor,and achieve decoupling control of the torque component and the excitation component of the stator current,the predictive control of the matrix converter and the rotor field oriented vector control of the asynchronous motor are combined.The rotor field orientation technology is combined,double closed loop with speed and flux is adopted,and the stator current and reactive power are multi-objective predictive controlled.Simulation results verified that the predictive control method of asynchronous motor based on matrix converter not only retain advantages of the traditional rotor flux oriented vector control of the asynchronous motor,but also make advantage of the predictive control.The input power factor is at unity,the power quality is improved;The decoupling control of the torque component and the excitation component of the stator current is achieved,the dynamic performance of the speed regulation system is improved.