Research and Implementation of SWISS Rectifier Based on Fuzzy PI Control

For the design of the three-phase buck-type SWISS rectifier controller, the model construction is not precise enough and the precision is low. The fuzzy PI control is introduced and compared with the traditional PI control. First, the working principle of the PFC circuit of the Buck-type SWISS rectifier is analyzed. Then the control structure and the design process of the system are given, the paper introduces the design of the traditional PI double closed loop controller and the fuzzy control law of fuzzy PI control? and the simulation experiment is carried out at the end. Theoretical analysis and simulation results show that the design of the control system in this paper is reasonable, the power factor is high, and the current harmonic content at the input side is low, and a stable low ripple voltage output can be achieved. Moreover, the static and dynamic performance of fuzzy PI control is better than that of traditional PI control, and it has better rapidity and robustness.