内置式永磁同步电机磁路饱和特性分析与补偿的研究

Research of magnetic saturation characteristic analysis and compensation in interior permanent magnet synchronous motor

分析了磁路饱和对内置式永磁同步电机(IPMSM)及其控制系统性能的影响。建立了考虑磁路饱和的电流控制算法,分别分析了磁路饱和在恒转矩和恒功率范围内对电机输出特性的影响。基于SVPWM控制方式和电流解耦控制原理,利用MATLAB仿真工具建立具有磁路饱和特性的内置式永磁同步电机模型及其磁路饱和影响补偿的调速系统模型,实现了系统仿真。仿真结果表明磁路饱和补偿的调速系统提高了输出转矩,拓宽了弱磁区的速度范围,且有效提高调速系统的跟随性,鲁棒性和精确度。

This paper analyzes the magnetic saturation effect on the IPMSM and the performance of its control system.The current control algorithm of saturation effect is established and the control performance is analyzed in constant torque range and constant power range.In the IPMSM speed system model based on SVPWM control method and decoupling control,the motor model with saturation characteristic and its control system with compensation of magnetic saturation are established by MATLAB software and realize simulation.The simulation results have indicated that the control system with compensation of magnetic saturation extends speed range in flux-weakening region,and improves the effectively the system following-up performance,robustness and the control accuracy.