NDLI: Digital Controller Design for a Practicing Power Electronics Engineer

Content Provider	IEEE Xplore Digital Library
Author	Al-Atrash, H. Batarseh, I.
Copyright Year	2007
Description	Author affiliation: Florida Power Electronics Center (FPEC), University of Central Florida (UCF), Orlando, Florida, USA. haatrash@mail.ucf.edu (Al-Atrash, H.) \|\| Florida Power Electronics Center (FPEC), University of Central Florida (UCF), Orlando, Florida, USA. batarseh@mail.ucf.edu (Batarseh, I.)
Abstract	Practical digital controller design for switching power converters is addressed in this paper. A simplified direct-digital design approach is proposed where digital compensation tools are analyzed in the familiar analog frequency domain. The design is based on traditional concepts and tools such as Bode plots, zero/pole insertion, and gain/phase margins. In contrast to analog redesign methods, this approach is able to accurately account for loop parasitics such as zero-order holds and computational delays and predict the system response. It does not entail the creation of a discrete-time model of the controlled plant, necessary for other direct-digital design approaches. Families of compensation zeros/poles are presented. Notably powerful are two families of complex zero pairs, able to create a sharp phase boost of 180 degrees, specifically useful for converters with high-Q filters. A numbering system is introduced that enables simple -yet optimized-number representation within a fixed-point environment. This system is utilized to model different controller blocks, and to construct a blue-print of the controller code. A design example is then used to demonstrate the design methodology. Experimental results of a matching prototype are then presented that show close correspondence to theoretical and simulation predictions.
Starting Page	34
Ending Page	41
File Size	2834461
Page Count	8
File Format	PDF
ISBN	1424407133
ISSN	10482334
DOI	10.1109/APEX.2007.357493
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-02-25
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Digital control Power electronics Design engineering Power engineering and energy Poles and zeros Power system modeling Switching converters Frequency domain analysis Analog computers Delay direct-digital design digital control
Content Type	Text
Resource Type	Article

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