DC servo drive control how to deal with current distortion

1, select the appropriate filter: DC servo drive is usually used in the LC filter or RC filter to suppress current distortion, LC filter can effectively suppress high-frequency interference, while the RC filter can effectively suppress low-frequency noise.

2, improve the sampling frequency: by increasing the current sampling frequency, you can more accurately control the current waveform, reduce current distortion, the sampling frequency should be greater than the vector control frequency of more than 5 times.

3, control the voltage holding time: in the DC servo drive, capacitor charging and discharging time has a great impact on the current waveform, control the voltage holding time can effectively reduce the current distortion.

4, optimize the PI controller parameters: PI controller is a DC servo drive commonly used control algorithms, optimize its parameters can improve the system response speed and stability, reduce current distortion.