PMSM控制系统中的开关频率优化与控制研究

Study on Switching Frequency Optimization and Controlling in PMSM Control Systems based on SVPWM

提出一种用于永磁同步电机(PMSM)控制系统的基于电压空间矢量脉宽调制的(SVPWM)的开关频率优化方法,即在高速时按照开关器件选择调制频率,在低速时进一步提高调制频率,以充分利用开关器件的开关频率,从而获得更好的低速性能。分析了开关频率选择的约束条件,给出了样机实验的构建和实验过程。实验结果验证了该方法的可行性和有效性。

A switching frequency optimization method used in permanent magnet synchronous motor（PMSM） control systems based on space vector pulse width modulation （SVPWM） is presented.The switching frequency regulation strategy is proposed, in which the switching frequency is determined by switching device in high speed range and by the system performances in low speed range.The constraint conditions are analyzed,and the simulative and the experi-mental platforms are constructed.Experimental results show that the switching frequency optimization method is feasible and effective.