基于SVPWM控制的无刷直流电机的建模与仿真

Model and simulation of brushless DC motor based on SVPWM control

针对传统无刷直流电机(BLDCM)控制系统方波驱动转矩脉冲大等缺点,采用了基于电压空间矢量脉宽调制(SVPWM)控制方法的正弦波驱动永磁无刷直流电机控制系统,建立了两级三相无刷直流电机的数学模型,利用Matlab/Simulink中的电力系统仿真工具箱SimPowerSystems建立了SVPWM控制下的无刷直流电机转速、电流双闭环控制系统的仿真模型。仿真结果表明,电压空间矢量控制下的无刷直流电机控制系统具有较好的静、动态特性,同时该仿真结果也验证了SVPWM控制无刷直流电机的有效性和仿真模型的正确性。

Aiming at the square wave drive torque pulses of traditional brushless DC motor（BLDCM） control system is high, the mathemati- cal model of the two-phase brushless DC motor was established based on space vector pulse width modulation （SVPWM） control method of the sine wave drive permanent magnet brushless DC motor control system. Simulation models of speed of brushless DC motor under SVPWM con- trol and control system of current double closed-loop were built by the simulation platform of Matlab/Simulink. The results indicate that brushless DC motor control system has good static and dynamic characteristics under the control of the voltage space vector, and the reason- ability and validity of the simulation model are verified.