NDLI: Small-signal modeling of combined phase shift and pulse width uniformly sampled modulators

Content Provider	IEEE Xplore Digital Library
Author	Scandola, L. Corradini, L. Spiazzi, G.
Copyright Year	2015
Description	Author affiliation: Dept. of Inf. Eng., Univ. of Padova, Padua, Italy (Scandola, L.; Corradini, L.; Spiazzi, G.)
Abstract	Multi-variable digital controllers exploiting a combination of phase shift and pulse width modulation (PSM+PWM) have recently been investigated as methods for simultaneously achieving output voltage regulation and efficiency optimization in dc-dc Series Resonant Converters. This paper discusses the small-signal dynamics of such combined phase shift and pulse width modulators when implemented digitally, and clarifies how the dynamical contributions of PSM+PWM around the generic harmonic of the switching rate can be expressed in the framework of dynamic phasor modeling. The study extends known results for uniformly sampled pulse width and phase shift modulators, illustrating the effects of sampling delays on the modulator output dynamics. Furthermore, results indicate that, in general, PWM and PSM individually induce both amplitude and phase modulation in the converter phasor dynamics. Closed-form results are presented for the generic harmonic of the modulated signal. Theoretical findings are validated via simulation and experimental results.
Starting Page	1
Ending Page	7
File Size	197773
Page Count	7
File Format	PDF
e-ISBN	9781467368476
DOI	10.1109/COMPEL.2015.7236473
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-07-12
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Phase modulation Harmonic analysis Frequency modulation Steady-state Time-domain analysis Baseband
Content Type	Text
Resource Type	Article

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