PMSM-SVPWM与PMSM-SPWM矢量控制系统对比研究

摘要

详细介绍了SVPWM的基本原理以及数字实现的重要基本环节;给出了PMSM在dq坐标系下的数学模型和基于该模型下的PMSM-SVPWM控制系统方框图;在SIMULINK环境下对PMSM-SVPWM矢量控制系统的三相桥式全控逆变电路模块、PMSM模块、两相旋转到两相静止坐标系转换模块以及SVPWM模块进行分别搭建并组合成完整控制系统.仿真后给出了系统的转矩和转速响应曲线以及给定的电压空间矢量圆轨迹.仿真结果反映了该SIMULINK模型的正确性和与实际相符性.同时还给出了与SVPWM对应的SPWM组成的PMSM控制系统仿真框图和相应曲线,并进行了相关谐波分析,对比结果表明SVPWM矢量控制系统更具有实用价值.%The basic principle and the important basic part of digital realization of SVPWM are introduced in detail. The mathematical model under the dq coordinate system and the model of PMSM-SVPWM control system block diagram based on the model are given.Under the Simulink environment the three-phase bridge full controlled inverter circuit module, PMSM module, two-phase rotating to two-phase stationary coordinate system conversion module and SVPWM module of the PMSM-SVPWM vector control system were established respectively and combined into a complete system. The response curves of the torque and speed of the system and the circular trajectory of the given voltage space vector are given after the simulation. The simulation results show the Simulink model is correct and accords with the actual. The simulation block diagram and the corresponding curve of PMSM control system composed of SPWM corresponding to SVPWM are also given and the related harmonic analysis are carried out. The results show that SVPWM vector control system has more practical value.