Transactions of China Electrotechnical Society  2022, Vol. 37 Issue (8): 1991-2005    DOI: 10.19595/j.cnki.1000-6753.tces.210316
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A Single-Stage Bridgeless Isolated PFC Converter with Wide Output Voltage Range and Low Voltage Stress
Sun Kai1, Ben Hongqi1, Meng Tao2, Zhao Zhiqiang1, Ding Mingyuan1
1. School of Electrical Engineering and Automation Harbin Institute of Technology Harbin 150001 China;
2. School of Mechanical and Electrical Engineering Heilongjiang University Harbin 150006 China

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Abstract  Since the single-stage bridgeless isolated power factor correction (PFC) converter has high voltage stress of the MOSFET, low power factor and high total harmonic distortion when it works in the Buck mode, a novel single-stage bridgeless isolated PFC converter is presented. This converter adopts a dual-winding split capacitor structure, which reduces the voltage stress of the MOSFET and the diodes. The power frequency MOSFET can eliminate the input current distortion, there by effectively realizing high power factor in Buck mode and broadening the range of output voltage. When the converter works in discontinue conduction mode (DCM), zero current switching (ZCS) of the diode can be achieved. The working principle and operating characteristics of the converter are analyzed in detail. Finally, a 50W experimental prototype is built to verify that the converter can work in a wide output voltage range, and has the advantages of small device voltage stress, low THD, high power factor, simple control method and high conversion efficiency.
Key wordsSingle-stage bridgeless isolated PFC converter      wide output voltage range      low voltage stress      high power factor     
Received: 11 March 2021     
PACS: TM461  
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Sun Kai
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Sun Kai,Ben Hongqi,Meng Tao等. A Single-Stage Bridgeless Isolated PFC Converter with Wide Output Voltage Range and Low Voltage Stress[J]. Transactions of China Electrotechnical Society, 2022, 37(8): 1991-2005.
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