基于脉宽调制的电流断续型谐振变换器

doi:10.19595/j.cnki.1000-6753.tces.220959

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Abstract This paper proposes a discontinuous current mode resonant converter with pulse width modulation (PWM) control. The fixed-frequency PWM control is employed, and an auxiliary inductor and an auxiliary capacitor are added to the primary side switch network. By adjusting the duty cycle of the drive signal of the primary side switch, the voltage amplitude between the midpoints of the bridge arm can be changed, and then the voltage gain of the converter can be adjusted. The resonant current works in discontinuous mode through a suitable parameter design for the converter, so there is no reactive current. Meanwhile, all switches can realize soft-switching, which reduces the switching loss. This paper first analyzes the working principle and operating modes of the converter. Then, the characteristics of the converter, including the voltage gain, soft-switching conditions, and discontinuous current mode conditions, are deduced, and a parameter design method is proposed. Finally, a 1 000W prototype is built to verify the feasibility of the converter and the correctness of the theoretical analysis.

Key words： Discontinuous current mode pulse width modulation resonant converter soft- switching

Received: 30 May 2022

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TM46

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	Articles by authors
	Chen Xiaoying
	Xu Guo
	Han Hua
	Xiong Wenjing
	Su Mei

Cite this article:

Chen Xiaoying,Xu Guo,Han Hua等. Discontinuous Current Mode Resonant Converter with Pulse Width Modulation Control[J]. Transactions of China Electrotechnical Society, 2022, 37(24): 6252-6261.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.220959 OR https://dgjsxb.ces-transaction.com/EN/Y2022/V37/I24/6252

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