Aiming at the problem that the dynamic adjustment time of traditional double-closed-loop control is too long,a three-level Boost PFC converter control strategy based on input and output linearization is proposed.Firstly,the working mode of the three-level Boost PFC converter is analyzed,and the state-space equation is established;Then,the input-output nonlinear model of the three-level Boost PFC converter is de-rived,and the feasibility of linearization is judged,and then the system is linearized;Finally,the controller is designed by using classical control theory,and the voltage balance control is added to ensure the midpoint po-tential balance of the converter.The simulation results show that when the load is constant,the input current can maintain the sinusoidal waveform with the phase change of the input voltage,and the current waveform is smoother.When the load jumps,the voltage and current are adjusted quickly,and the output voltage is kept constant except for a slight change in ripple,indicating that the proposed control strategy has good dynamic and static characteristics and strong robustness.
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