耦合电感序列切换的快速卸载瞬态响应Buck变换器

doi:10.19595/j.cnki.1000-6753.tces.L80332

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Abstract In this paper, a fast unloading transient response Buck converter using coupled-inductor auxiliary circuits based sequence switching control scheme is proposed, so as to improve the unloading transient response of the time-optimal control (TOC) scheme. The proposed auxiliary coupled inductor circuit is controlled to connect in parallel with the input voltage source, so as to increase the inductor-current slew rate during an unloading transient. Furthermore, an ‘n+1’ sequence switching strategy is proposed to control the auxiliary coupled inductor. With the proposed control strategy the load transient event is divided into n+1 sub-periods, and in each sub-period, the capacitor-charge balance principle is used to determine the switching time sequence. In addition, the system voltage overshoot is determined by the maximum voltage overshoot in each of n+1 periods, and the settling time is shortened to the moment that the inductor current reached the output current firstly. Moreover, a 12V/3.3V synchronous Buck converter has been built to verify the feasibility of the proposed scheme.

Key words： Buck converter coupled inductor sequence switching control unloading transient response

Received: 01 July 2018 Published: 05 March 2020

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TM46

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	Articles by authors
	Zhao Zhaoyang
	Lu Weiguo
	Hu Zhiling
	Ma Junwen
	Zhou Luowei

Cite this article:

Zhao Zhaoyang,Lu Weiguo,Hu Zhiling等. Fast Unloading Transient Response Buck Converter Using Coupled Inductor Based on Sequence Switching Control[J]. Transactions of China Electrotechnical Society, 2020, 35(zk1): 28-36.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.L80332 OR https://dgjsxb.ces-transaction.com/EN/Y2020/V35/Izk1/28

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