有源钳位正激二次侧谐振PWM Buck-Boost型变换器

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Abstract Due to the reverse recovery loss of output diode and the difficulty to satisfy soft switching condition of traditional active-clamp forward (ACF) converter under light load condition, a secondary side resonant (SSR) PWM ACF converter is proposed in this paper. Its operation modes and steady state characteristics are analyzed. The analysis results show that ACF-RPWM Buck-Boost-type converter exhibits the characteristics of DC-DC transformer (DCX) with its DC voltage conversion ratio independent of load, switching frequency and duty ratios. The proposed ACF-SSR-PWM Buck-Boost-type converter can realize zero-voltage turn-on switching (ZVS) of switches in the full load range and zero-current turn-off switching (ZCS) of the diode. Compared with traditional secondary resonant ACF converter, ACF-SSR-PWM Buck-Boost type converter has reduced switch current stress and turn-off current of the main switch. Finally, a 200V input, 50V/1.6A output experimental prototype is established to verify the correctness of the theoretical analysis.

Key words： Active clamp forward converter resonant converter PWM converter soft-switching technique DC-DC transformer

Received: 23 July 2013 Published: 27 June 2014

PACS:	TN86
	TM463

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	Articles by authors
	Cao Taiqiang
	Wang Jun
	Sun Zhang
	Luo Qian

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Cao Taiqiang,Wang Jun,Sun Zhang等. Active Clamp Forward Secondary Side Resonant Buck-Boost PWM Converter[J]. Transactions of China Electrotechnical Society, 2014, 29(4): 10-18.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2014/V29/I4/10

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