空间矢量脉宽调制(SVPWM)技术的仿真与分析

Simulation and Analysis of Space Vector Pulse Width Modulation Technique

基于SVPWM的磁链跟踪和电压矢量合成原理,理论分析了SVPWM的直流电压利用率,在Matlab/Simulink中建立SVPWM及永磁同步电机调速系统的仿真模型.仿真结果表明,SVPWM可在电机空间实现圆形磁场,输出电压谐波集中在载波频率整数倍附近,较高的调制比可获得较小的电压谐波畸变.

By analyzing the basic principle of flux tracking and voltage space vector synthesis,the DC voltage utilization ratio of space vector pulse width modulation（SVPWM） was analyzed theoretically.The PMSM speed regulating system model adopting SVPWM technique was built in Matlab/Simulink environment.And the simulation results show that SVPWM yields a circular magnetic field in motor space.The harmonics of output voltage distribute mainly around integer multiples of carrier frequency,and higher modulation index yields a lower voltage total harmonic distortion.