Modeling Research of Three-Level Power Factor Correction Converter

Compared with the traditional Boost type power factor correction converter, the three-level Boost type power factor correction converter has the advantage of multi-level structure topology, and can be used in the need to reduce the power inductor volume and high output voltage. This paper will analyze the topology and working principle of the discontinuous conduction mode three-level Boost type power factor correction converter, establish the Sigmoid mathematical model considering the switching tube voltage drop and other parameters, and then establish the system model under closed-loop control based on the control strategy principle under full duty ratio. Finally, a simulation model is established by MATLAB\SIMULINK to verify the accuracy of the mathematical model of the closed-loop control system of the three-level Boost type power factor correction converter, and the control performance of this control method is proved to be good. This paper provides an accurate open-loop mathematical model to study the stability of the three-level Boost type power factor correction converter under other control methods.