NDLI: Zero-voltage transition converter with high efficiency operating at constant switching frequency

Content Provider	IEEE Xplore Digital Library
Author	Huai Wei Ioinovici, A.
Copyright Year	1992
Abstract	A new type of zero-voltage-transition pulsewidth modulation (PWM) dc-dc converter is developed by adding two active switches and three diodes to the structure of a quasiresonant converter. The resonant capacitors are not discrete elements, their role is played by the parasitic capacitances of the MOSFETs. By adjusting the interval between the operation of the active switches, a duty-cycle control is obtained. Soft-switching is ensured for all switches for a wide line range and load range. One of the additional diodes is connected in the input circuit and the energy flow in the resonant stage is transferred from a path defined by the two additional transistors to a path given by the two additional diodes in the resonant tank; as a result, the resonant capacitor voltage is prevented from surpassing the input voltage; it drops to zero before the main switch is turned on. All switches are subjected to voltage and current stresses like those in their PWM classical counterparts, implying small conduction losses. The new converter exhibits a high efficiency and good regulation capability.
Starting Page	1121
Ending Page	1128
Page Count	8
File Size	227614
File Format	PDF
ISSN	10577122
Volume Number	45
Issue Number	11
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1998-11-01
Publisher Place	U.S.A.
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Switches Pulse width modulation converters Pulse width modulation Resonance Diodes DC-DC power converters Switching converters MOSFETs Zero voltage switching Capacitors
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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