Method for solving phase lag caused by three-phase current sampling and filtering, electronic equipment, and computer-readable storage medium
A technology of phase lag and three-phase current, which is applied in the field of frequency conversion, can solve problems such as phase lag, achieve low failure rate, accurate signal sampling and filtering, and achieve simple and accurate effects
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[0038] In order to solve the phase lag problem caused by three-phase current sampling and filtering, this embodiment mainly includes two parts: coordinate transformation and low-pass filtering of the collected three-phase AC signal of the frequency converter. After the signal is collected, the three-phase AC signal is digitally converted into a DC signal, and the converted DC signal is filtered through a low-pass filter in the form of a DC signal. After the filtering is completed, it is converted back into a three-phase AC signal. Since the filtering object is converted into a DC signal, the phase lag problem caused by the filtering of the AC signal is solved.
[0039] See figure 2 , the above scheme specifically includes the following steps executed in sequence:
[0040] Step S1. Through the ADC channel of the controller, sample the three-phase AC signal (can be voltage or current) of the frequency converter x A , x B , x C , since it is a three-phase AC signal with a ph...
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