A unified analysis of converters with resonant switches
- Creators
- Freeland, Steve
- Middlebrook, R. D.
Abstract
Quasi-resonant converters are a recently introduced family of single-switch resonant converters featuring zero-current or zero-voltage switching. Recognition of the topological structure uniting these converters — and the PWM converters on which they are based — leads to general models of their dc and low-frequency ac behavior. An expression is derived that yields the dc conversion ratio of a quasi-resonant converter in terms of the well-known conversion ratio of the underlying PWM topology. A small-signal, low-frequency dynamic model is developed whose parameters also incorporate the PWM conversion ratio. The dc and ac models reveal that any quasi-resonant converter with a full-wave resonant switch has dc and low-frequency behavior identical to that of its PWM parent, with switching frequency control replacing duty ratio control. Converters with half-wave resonant switches act more like PWM converters under current programming or discontinuous conduction mode, exhibiting lossless damping in the small-signal model and output resistance at dc.
Additional Information
© 1987 IEEE. This work was conducted under the Power Electronics Program supported by grants from GTE Communication Systems Corp., Rockwell Inc., and EG&G Almond Instruments, Inc.Attached Files
Published - 07077159.pdf
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Additional details
- Eprint ID
- 66063
- Resolver ID
- CaltechAUTHORS:20160411-162506133
- GTE Communication Systems Corporation
- Rockwell Inc.
- EG&C Almond Instruments
- Created
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2016-04-12Created from EPrint's datestamp field
- Updated
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2021-11-10Created from EPrint's last_modified field