Modelling of quantization effects in digitally controlled dc-dc converters
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hdl:2117/331186
Document typeArticle
Defense date2006-11
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Rights accessRestricted access - publisher's policy
Abstract
In digitally controlled dc-dc converters with a single voltage feedback loop, the two quantizers, namely the analog-to-digital (A/D) converter and the digital pulse-width modulator (DPWM), can cause undesirable limit-cycle oscillations. In this paper, static and dynamic models that include the quantization effects are derived and used to explain the origins of limit-cycle oscillations. In the static model, existence of dc solution, which is a necessary no-limit-cycle condition, is examined using a graphical method. Based on the generalized describing function method, the amplitude and offset-dependent gain model of a quantizer is applied to derive the dynamic system model. From the static and dynamic models, no-limit-cycle conditions associated with A/D, DPWM and compensator design criteria are derived. The conclusions are illustrated by simulation and experimental examples
CitationPeng, H. [et al.]. Modelling of quantization effects in digitally controlled dc-dc converters. "IEEE transactions on power electronics", Novembre 2006, vol. 22, núm. 6, p. 208-215.
ISSN0885-8993
Publisher versionhttps://ieeexplore.ieee.org/document/4052430
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