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Averaging Method for PWM DC-DC Converters Operating in Discontinuous Conduction Mode with Feedback
N.M. ADAMALI SHAH, Mohammed S. Al-Numay
Pages - 257 - 267     |    Revised - 01-07-2011     |    Published - 05-08-2011
Volume - 5   Issue - 3    |    Publication Date - July / August 2011  Table of Contents
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KEYWORDS
switched systems, Pulse-width modulation (PWM), discrete-time modeling, one cycle-averaging, sampled data model
ABSTRACT
In this paper, a one-cycle-average (OCA) discrete-time model for PWM dc-dc converter based on closed-loop control method for discontinuous conduction mode (DCM) is presented. It leads to exact discrete-time mathematical representation of the OCA values of the output signal even at low frequency. It also provides the exact discrete-time mathematical representation of the average values of other internal signals with little increase in simulation time. A comparison of this model to other existing models is presented through a numerical example of boost converter. Detailed simulation results confirm the better accuracy and speed of the proposed model.
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Mr. N.M. ADAMALI SHAH
King Saud University - Saudi Arabia
Dr. Mohammed S. Al-Numay
King Saud University - Saudi Arabia
alnumay@ksu.edu.sa