- 期刊
Research on High Frequency SWISS Rectifier based on Digital Control
摘要
SWISS rectifier has the characteristics of high output power, adjustable output voltage, easy high-frequency, etc., which is very suitable for high-power conversion occasions such as high-power charging of electric vehicles, data centers, communication base stations, etc. In this paper, a design scheme of SWISS rectifier controlled by STM32G474 single chip microcomputer is proposed. The voltage and current PI double closed-loop control strategy is used to realize the accurate control of output voltage, and the control algorithm is designed to realize the power factor correction function of the system. This paper introduces the working principle of SWISS rectifier, and gives the calculation method of key component parameters. The simulation model of 750V/20kW is built by PLECS simulation software to verify the proposed scheme. The results show that the power factor of the system can reach 0.999 at rated power, the output voltage ripple is about 0.2V after stability, and the THD is 3.1%, and the system has a fast response speed, which verifies the feasibility of the scheme.