Abstract
In this paper, a novel three-phase buck PFC converter based on one-cycle control is presented. With the one-cycle control, compared with the traditional direct current control, no need to detect the input and output voltage of the converter, the voltage sensors and the multiplier in the control loop are eliminated. The control circuit is simple, fast response, high precision and low cost. In addition, the power circuit topology is novel, it not only achieves unity power factor and low THD, but also overcomes some disadvantages of the three-phase boost PFC converter. The power circuit topology, the operation mode and principle of the proposed converter are described in detail in this paper. An experimental example is presented, and the parameters of the power circuit and the control loop are designed and optimized, and the system stability is analyzed. Finally the theoretical analysis is supported by the simulation and experimental results, and the results verify the validity and feasibility of the proposed converter topology and control strategy.
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