具有宽负载范围和低电压应力的三态反激PFC变换器

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Abstract A novel tri-state Flyback power factor correction(PFC) converter with wide range of load and low switch voltage stress is proposed. By adding power switch and diode, which makes the converter operate in pseudo continuous conduction mode(PCCM), can slove the small power limitation when the conventional flyback PFC converter works under discontinuous conduction mode(DCM). Besides, it also can reduce the voltage stress of the power switch in the conventional DCM flyback PFC converter. Operation principle and steady-state characteristic analyze are discussed in detail. It can be seen that the proposed converter can obtain good power factor correction ability, low switch voltage stress and wide load range. The performance is verified by experimental results.

Key words： Flyback converter pseudo continuous conduction mode(PCCM) power factor correction(PFC) tri-state wide load range low voltage stress

Received: 05 January 2013 Published: 13 April 2015

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TN86

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	Zhang Fei
	Xu Jianping
	Yan Tiesheng
	Dong Zheng

Cite this article:

Zhang Fei,Xu Jianping,Yan Tiesheng等. Tri-state Flyback PFC Converter with Wide Load Range and Low Voltage Stress[J]. Transactions of China Electrotechnical Society, 2015, 30(3): 123-130.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2015/V30/I3/123

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