NDLI: Frequency response analysis for power conversion products without small-signal linearization

Content Provider	IEEE Xplore Digital Library
Author	Siri, K. Truong, C.
Copyright Year	2004
Description	Author affiliation: Aerosp. Corp., El Segundo, CA, USA (Siri, K.)
Abstract	Presented herein is an accurate approach for combining large signal modeling and frequency-domain analysis of a closed-loop DC-DC converter power system without small-signal linearization. The approach provides a high-fidelity solution for the converter's frequency response due to the inclusion of all non-linearity and parasitic effects and is applicable to both pulse-by-pulse switching and average large-signal models of DC-DC converters. In control-oriented simulators, fast Fourier transformation (FFT) is applied to the converter responses, being uniformly sampled for one period of each injected small signal. In circuit-oriented simulators, fundamental frequency components are extracted out of the converter time-domain responses that are usually simulated in a variable time-step mode. This simple, direct, and accurate analysis approach is critically needed for performance evaluation of the converter system frequency response and design validation of the converter closed-loop systems for which the linearizable large-signal models are not available. The "virtual network analyzer" approach provides an increase in the fidelity of non-linear and parasitic effects within the controller and converter's power stages for which the 'as is' non-linear pulse-by-pulse switching model is directly simulated. The frequency response analysis approach was validated with a converter power system operating in solar-array voltage regulation mode.
Sponsorship	Aerosp. and Electron. Syst. Soc
Starting Page	4026
Ending Page	4033
File Size	631341
Page Count	8
File Format	PDF
ISBN	0780381556
ISSN	1095323X
DOI	10.1109/AERO.2004.1368221
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-03-06
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Frequency response Power conversion Power system modeling Pulse power systems Power system simulation DC-DC power converters Switching converters Circuit simulation Power system analysis computing Frequency domain analysis
Content Type	Text
Resource Type	Article
Subject	Aerospace Engineering Space and Planetary Science

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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