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Binary controlled single phase PFC rectifier

A novel control strategy by means of binary combination for single phase rectifier circuit is proposed. The sinusoidal AC line current waveform with 31 levels only by using 4 switching devices can be obtained without using any filter circuits, whereas the conventional bridge converter composed of the same number of devices has 3 levels with rich switching harmonics. The features of the proposed rectifier are the low electromagnetic interferences and the low switching loss because the handling power of the LSB switching device for high switching operation is very small. In this paper, we describe the circuit configuration, the principle of control method and the relation between the number of levels and switching devices as compared with the conventional multiple connected rectifier circuit. After that, we show the control system for the proposed converter circuit. Then, we verify the feasibility of the binary converter from some simulation and experimental results.