Active-clamp ZVS converter with step-up voltage conversion ratio

This article presents the circuit implementation and design considerations of a zero voltage switching (ZVS) converter with voltage step-up for battery-based applications. An active-clamp circuit including one auxiliary switch and one clamp capacitor is connected in parallel with the main switch to...

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Bibliographic Details
Published in:International journal of electronics 2009-05, Vol.96 (5), p.491-502, Article 491
Main Authors: Lin, Bor-Ren, Dong, Jia-Yu, Chen, Jyun-Ji
Format: Article
Language:English
Subjects:
active clamp
Applied sciences
Batteries
Circuit properties
Circuits
Dielectric, amorphous and glass solid devices
Electric, optical and optoelectronic circuits
Electronic circuits
Electronics
Exact sciences and technology
Ratios
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
Semiconductors
Switching, multiplexing, switched capacity circuits
voltage step-up
zero voltage switching
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Summary:This article presents the circuit implementation and design considerations of a zero voltage switching (ZVS) converter with voltage step-up for battery-based applications. An active-clamp circuit including one auxiliary switch and one clamp capacitor is connected in parallel with the main switch to allow resonant behaviour by the output capacitances of switches and transformer leakage inductance during the transition interval. Thus, the ZVS turn-on of switches can be achieved. The switching losses and thermal stresses of the semiconductors are reduced. The circuit configuration, operation principle and design considerations of the converter are discussed in detail. Finally, experiments conducted on a laboratory prototype rated at 200 W are provided to verify the theoretical analysis and the effectiveness of the proposed converter.
ISSN:0020-7217
1362-3060
DOI:10.1080/00207210802696142