Analysis, Design, Modeling, and Implementation of an Active Clamp HF Link Converter

De, Dipankar and Ramanarayanan, Venkataramanan (2011) Analysis, Design, Modeling, and Implementation of an Active Clamp HF Link Converter. In: IEEE Transactions on Circuits and Systems I: Regular Papers, 58 (6). pp. 1446-1455.

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Abstract

This paper deals with the system oriented analysis, design, modeling, and implementation of active clamp HF link three phase converter. The main advantage of the topology is reduced size, weight, and cost of the isolation transformer. However, violation of basic power conversion rules due to presence of the leakage inductance in the HF transformer causes over voltage stresses across the cycloconverter devices. It makes use of the snubber circuit necessary in such topologies. The conventional RCD snubbers are dissipative in nature and hence inefficient. The efficiency of the system is greatly improved by using regenerative snubber or active clamp circuit. It consists of an active switching device with an anti-parallel diode and one capacitor to absorb the energy stored in the leakage inductance of the isolation transformer and to regenerate the same without affecting circuit performance. The turn on instant and duration of the active device are selected such that it requires simple commutation requirements. The time domain expressions for circuit dynamics, design criteria of the snubber capacitor with two conflicting constrains (over voltage stress across the devices and the resonating current duration), the simulation results based on generalized circuit model and the experimental results based on laboratory prototype are presented.

Item Type:	Journal Article
Publication:	IEEE Transactions on Circuits and Systems I: Regular Papers
Publisher:	IEEE
Additional Information:	Copyright 2011 IEEE. Personal use of this material is permitted.However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Keywords:	Active clamp;design criteria;HF link;modeling;resonating current
Department/Centre:	Division of Electrical Sciences > Electrical Engineering
Date Deposited:	22 Jun 2011 09:28
Last Modified:	22 Jun 2011 09:28
URI:	http://eprints.iisc.ac.in/id/eprint/38424

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