Design and control of low output voltage buck rectifier

摘要

In this paper, a topology of three-phase buck rectifier which is suitable for the low output voltage application and its control principle are proposed to reduce the cost and simplify the control. The proposed topology uses the phase voltage instead of the line voltage to supply power. Thus, it can decrease the rating voltage of switching devices, and save the cost. Moreover, the proposed control is easy to be realized as it does not need to detect the phase section or adjust control for different sections. The current THD can be reduced by decreasing the voltage difference on the inductors. The propose three-phase buck rectifier and its control are verified by simulation in PLECS.