通过小信号环路估计DC-DC开关变换器的大信号稳定区域预测

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Abstract The relative stability of switching converter could be designed based on the classic linear frequency-domain theory, and thus small-signal characteristic of the system is to be easily predicted and shaped. Meanwhile, the large-signal stability for the closed-loop system is also assured as the result of the sufficient stability margins in the design of the loop gains. Taking the average current mode controlled (ACMC) Boost converter as the typical object of study, this paper analyzes the large-signal stability of the Boost converter via its control model in this paper. In light of the Norm’s inequality, the sufficient stable condition for the Boost converter is derived and the stability region is predicted. Also, the effects of the small-signal loop gains on the large-signal stability region are revealed. Finally, the circuit prototype is built to verify the effectiveness of the presented approach.

Key words： Switching converter loop gain stability region large signal stability Boost converter

Received: 03 June 2013 Published: 27 June 2014

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TM46

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	Liu Sucheng
	Zhou Luowei
	Lu Weiguo
	Bi Kai

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Liu Sucheng,Zhou Luowei,Lu Weiguo等. Prediction of Large-Signal Stability Region via Small-Signal Loops for DC-DC Switching Converters[J]. Transactions of China Electrotechnical Society, 2014, 29(4): 63-69.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2014/V29/I4/63

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