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Low-Frequency Characterization of Switched dc-dc Converters

Webster, G. W. and Middlebrook, R. D. (1973) Low-Frequency Characterization of Switched dc-dc Converters. IEEE Transactions on Aerospace and Electronic Systems, AES-9 (3). pp. 376-385. ISSN 0018-9251. doi:10.1109/TAES.1973.309723.

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Averaging techniques are developed to represent buck, boost, and buck-boost types of switched dc-dc converters by approximate continuous models. Simple analytical expressions in terms of the circuit components are derived for the characteristic transient and frequency responses of time-averaged (continuous) power-stage models for use in designing and understanding the behavior of corresponding switched power stages. Novel conclusions include the dependence of effective circuit component values upon switch duty ratio and the existence of a real positive zero in certain transfer functions. Responses from analog computer simulations of the switched and averaged power stages agree well and, in turn, confirm the analytic predictions. High-order systems can be analyzed by the averaging technique without a commensurate increase in complexity.

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Additional Information:© 1973 IEEE. Presented at the Third IEEE Power Processing and Electronic Specialists Conference, Atlantic City, N.J., May 1972. Manuscript received May 15, 1972.
Issue or Number:3
Record Number:CaltechAUTHORS:20160407-115214408
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:65985
Deposited On:13 Apr 2016 18:40
Last Modified:10 Nov 2021 23:51

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