NDLI: A new active clamping zero-voltage switching PWM current-fed half-bridge converter

Content Provider	IEEE Xplore Digital Library
Author	Sang-Kyoo Han Hyun-Ki Yoon Gun-Woo Moon Myung-Joong Youn Yoon-Ho Kim Kang-Hee Lee
Copyright Year	1986
Abstract	A new active clamping zero-voltage switching (ZVS) pulse-width modulation (PWM) current-fed half-bridge converter (CFHB) is proposed in this paper. Its active clamping snubber (ACS) can not only absorb the voltage surge across the turned-off switch, but also achieve the ZVS of all power switches. Moreover, it can be applied to all current-fed power conversion topologies and its operation as well as structure is very simple. Since auxiliary switches in the snubber circuit are switched in a complementary way to main switches, an additional PWM IC is not necessary. In addition, it does not need any clamp winding and auxiliary circuit besides additional two power switches and one capacitor while the conventional current-fed half bridge converter has to be equipped with two clamp windings, two ZVS circuits, and two snubbers. Therefore, it can ensure the higher operating frequency, smaller-sized reactive components, lower cost of production, easier implementation, and higher efficiency. The operational principle, theoretical analysis, and design considerations are presented. To confirm the operation, validity, and features of the proposed circuit, experimental results from a 200-W, 24-200Vdc prototype are presented.
Sponsorship	IEEE Power Electronics Society
Starting Page	1271
Ending Page	1279
Page Count	9
File Size	757212
File Format	PDF
ISSN	08858993
Volume Number	20
Issue Number	6
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-11-01
Publisher Place	U.S.A.
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Clamps Zero voltage switching Pulse width modulation Pulse width modulation converters Switching converters Switches Snubbers Switching circuits Surges Power conversion switched mode power supplies DC/DC power conversion snubbers
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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