大功率永磁同步电机的减振降噪控制方法研究

摘要

In the application of high-power field,high-power permanent-magnet synchronous motor (PMSM) servo system was forcing the problem of high-frequency vibration caused by switching frequency.In order to minimize current harmonics of driver,clarified the theme from four aspects.Firstly,power spectrum density(PSD) of random space vector pulse width modulation was analyzed.Secondly,it elaborated the mechanism of vibration damping and denoising,using RSVPWM and sinusoidal wave filter respectively.Thirdly,the simulation model based on MATLAB of serve system was established.The effectiveness of RSVPWM and sinusoidal wave filter was simulated.Fourthly,the two methods were conducted in experiments.Simulation and experimental results indicated that both methods could reduce harmonic,reduce the high frequency vibration of the PMSM.%大功率永磁同步电机伺服系统在一些大功率领域的应用中,面临着因开关频率所造成的高频振动问题.为了将驱动器输出的电流谐波抑制到最小,首先对随机空间矢量脉宽调制(RSVPWM)进行功率谱密度分析,阐述了RSVPWM和正弦波滤波器的减振降噪机理,并对正弦波滤波器的参数进行了分析.建立了基于MATLAB的系统仿真模型,并在该模型的基础上对RSVPWM和正弦波滤波器的抑制谐波效果进行了仿真与试验分析.仿真及试验结果均表明,两种方法均可以将驱动器的高频谐波降低,从而减小电机的高频振动.