A Novel High-Frequency Transformer-Linked Soft-Switching Half-Bridge DC–DC Converter With Constant-Frequency Asymmetrical PWM Scheme
Mishima, T.
Nakaoka, M.
Dept. of Electr. Eng. & Inf. Sci., Kure Nat. Coll. of Technol., Kure, Japan;
This paper appears in: Industrial Electronics, IEEE Transactions on
Publication Date: Aug. 2009
Volume: 56,
Issue: 8
On page(s): 2961-2969
ISSN: 0278-0046
INSPEC Accession Number: 10793121
Digital Object Identifier: 10.1109/TIE.2009.2013692
First Published: 2009-02-06
Current Version Published: 2009-07-24
Abstract
This paper presents a novel soft-switching half-bridge dc-dc converter with high-frequency link. The newly proposed soft-switching dc-dc converter consists of a single-ended half-bridge inverter controlled by an asymmetrical pulsewidth-modulation scheme and a center-tapped diode rectifier. In order to attain the wide range of soft commutation under constant switching frequency, the single active edge-resonant snubber cell composed of a lossless inductor and a switched capacitor is employed for the half-bridge inverter leg, providing and assisting zero-current-switching operations in the switching power devices. The practical effectiveness of the proposed soft-switching dc-dc converter is demonstrated by the experimental results from an 800 W - 55 kHz prototype. In addition, the feasibility of the dc-dc converter topology is proved from the viewpoints of the high efficiency and high power density.
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