Title

A New Duty-Cycle-Shifted Pwm Control Scheme For Half-Bridge Dc-Dc Converters To Achieve Zero-Voltage-Switching

Keywords

Asymmetric Control; Converts; DC-DC; Duty-Cycle-Shifted PWM Control; Half-Bridge; High Current; Low Voltage; Modulation Scheme; Soft-Switching; Symmetric Control

Abstract

Asymmetric control scheme is an approach to achieve ZVS for half-bridge isolated DC-DC converter. However, it is not suited for wide-range input voltage due to the uneven voltage and current components stresses. This paper presents a new "duty-cycle-shifted PWM control" scheme for half-bridge isolated dc-dc converters to achieve ZVS operation without asymmetric penalties and without adding additional components. Because the duty cycle width is kept identical for both switches, the asymmetric current and voltage stresses problem is eliminated. The principles of operation and key features are illustrated. Experimental results verify that higher efficiency is achieved with the proposed "duty-cycle-shifted" control method, especially at higher switching frequency.

Publication Date

1-1-2003

Publication Title

Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC

Volume

2

Number of Pages

629-634

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

Socpus ID

0037230832 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/0037230832

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