Analysis and Simulation of a Sepic-based Power Factor Correction Circuit
The Sepic-PFC circuit is widely used in industrial power factor correction due to its advantages such as high efficiency,wide input and output voltage range,and small output voltage ripple.This article analyzes the operating modes of the traditional Sepic-PFC circuit and summarizes its advantages and disadvantages.Aiming at the shortcoming of high voltage stress on the switching devices in the traditional circuit,an improved Sepic-PFC circuit is introduced,and relevant theoretical analysis and formula derivation are provided.Finally,a simulation model is built using Simulink software,and the simulation results are compared to verify the low voltage stress of the switching devices and the excellent power factor correction function of the improved Sepic-PFC circuit.
power factor correctionSepic circuitvoltage stress
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