Three-phase Two-level Active Power Factor Correction Circuit Design

摘要

The harmonic pollution of power electronic equipment has a strong negative effect on the quality of power supply and power efficiency. In order to improve the power factor, we designed the three-phase two-level active power factor correction (APFC) circuit. The former Boost converter connected with the input power side of the rectifier realized power factor correction (PFC). The post Buck converter has the function of adjusting the output voltage quickly and we designed the corresponding two-level control circuit. We carried out the simulation in the Matlab/simulink software environment. The results showed that the input current waveform is almost the same as that of the bridge rectifier voltage waveform, the input current distortion and harmonics are obviously reduced, and the power factor correction is realized.