THD的谐波分析对电机控制性能的影响分析

[昔时扬尘处]

对于自抗扰控制作为转速环的，PI控制作为电流环的 永磁同步电机控制系统，相电流THD分析有相关介绍？一般是THD多少可以算是正常呢？

[昔时扬尘处]

As we all know, when the harmonic component of the current is smaller, the torque ripple of the PMSM control system is better. When the current THD is within 10% it is acceptable, referencing practical engineering applications. Therefore, the analysis of the current THD is an important factor for reducing torque ripple of the PMSM control system. And according to mechanical motion equation of the motor, the output of the speed is obtained by the torque through the low-pass filter, whose cut-off frequency is B/J. If the frequency of the torque ripple is higher than that of the low-pass filter, the motor can obtain relatively satisfactory speed regulation performance even through the torque ripple exists. In addition, the focus of this paper is to ensure that the anti-disturbance could be achieved with the very low overshoot, the high-accuracy, and high-stability of the speed performance simultaneously. The current distortion and torque ripple of the PMSM control system would be the next focus point of future research.

[昔时扬尘处]

众所周知，电流谐波分量越小，永磁同步电动机控制系统的转矩脉动越大。当电流THD在10%以内时，参考实际工程应用，是可以接受的。因此，电流THD的分析是降低永磁同步电动机控制系统转矩脉动的重要因素。 根据电机的机械运动方程，转矩通过低通滤波器获得转速输出，其截止频率为B/J，当转矩脉动频率高于低通滤波器频率时，即使通过转矩，电机也能获得较为满意的调速性能涟漪存在。另外，本文的重点是保证在实现超调量很低、速度性能高精度和高稳定性的同时实现抗干扰。永磁同步电动机控制系统的电流畸变和转矩脉动是下一步研究的重点。

[chan_hvipin]

你好 看到回复一下

[昔时扬尘处]

引用 3 楼 chan_hvipin的回复:

你好 看到回复一下

请问你是？有什么疑问？

[chan_hvipin]

您是做硬件测试吗