Low ripple and noise DC/DC converter with quasi-resonant switching and integrated magnetics.

Persistent Link:
http://hdl.handle.net/10150/187413
Title:
Low ripple and noise DC/DC converter with quasi-resonant switching and integrated magnetics.
Author:
Hsiu, Leng-nien.
Issue Date:
1995
Publisher:
The University of Arizona.
Rights:
Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
Abstract:
A low output ripple and noise converter is achieved by employing a zero-voltage switch (ZVS), an integrated magnetics structure which couples a transformer and several coupled inductors in one core, and several auxiliary packaging designs. In the steady-state analysis, the operation of ZVS converter is described and the ZVS switch resonant component design procedure is developed. An optimized geometrical core constant integrated magnetics design procedure is proposed. Some auxiliary packaging design considerations are addressed. The converter ac analysis is divided into two parts to observe the individual small signal effect introduced by the ZVS switch and coupled inductor. The uncoupled-inductor converter ac analysis is conducted by a new approach: an extended circuit averaging method. The converter ac model is obtained by substituting in the coupled inductor ac model to the uncoupled-inductor converter ac model. It is found both the dc coupled inductor zero current ripple condition and the ac converter transfer function response are affected by the turns ratio and the leakage inductance of the coupled inductor. Hence, the converter dc and ac designs are coupled by the coupled inductor operation. Experimental results of the dc and ac analysis of a ZVS converter with coupled inductor are shown. Integrated magnetics achieves less than 3% peak-to-peak current ripple on both coupled inductors at the same time. The equivalent result by separate magnetics approach requires twice the volume implemented by the integrated magnetics structure.
Type:
text; Dissertation-Reproduction (electronic)
Degree Name:
Ph.D.
Degree Level:
doctoral
Degree Program:
Electrical and Computer Engineering; Graduate College
Degree Grantor:
University of Arizona
Committee Chair:
Witulski, Arthur F.

Full metadata record

DC FieldValue Language
dc.language.isoenen_US
dc.titleLow ripple and noise DC/DC converter with quasi-resonant switching and integrated magnetics.en_US
dc.creatorHsiu, Leng-nien.en_US
dc.contributor.authorHsiu, Leng-nien.en_US
dc.date.issued1995en_US
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en_US
dc.description.abstractA low output ripple and noise converter is achieved by employing a zero-voltage switch (ZVS), an integrated magnetics structure which couples a transformer and several coupled inductors in one core, and several auxiliary packaging designs. In the steady-state analysis, the operation of ZVS converter is described and the ZVS switch resonant component design procedure is developed. An optimized geometrical core constant integrated magnetics design procedure is proposed. Some auxiliary packaging design considerations are addressed. The converter ac analysis is divided into two parts to observe the individual small signal effect introduced by the ZVS switch and coupled inductor. The uncoupled-inductor converter ac analysis is conducted by a new approach: an extended circuit averaging method. The converter ac model is obtained by substituting in the coupled inductor ac model to the uncoupled-inductor converter ac model. It is found both the dc coupled inductor zero current ripple condition and the ac converter transfer function response are affected by the turns ratio and the leakage inductance of the coupled inductor. Hence, the converter dc and ac designs are coupled by the coupled inductor operation. Experimental results of the dc and ac analysis of a ZVS converter with coupled inductor are shown. Integrated magnetics achieves less than 3% peak-to-peak current ripple on both coupled inductors at the same time. The equivalent result by separate magnetics approach requires twice the volume implemented by the integrated magnetics structure.en_US
dc.typetexten_US
dc.typeDissertation-Reproduction (electronic)en_US
thesis.degree.namePh.D.en_US
thesis.degree.leveldoctoralen_US
thesis.degree.disciplineElectrical and Computer Engineeringen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.chairWitulski, Arthur F.en_US
dc.contributor.committeememberSchrimpf, Ronald D.en_US
dc.contributor.committeememberTharp, Hal S.en_US
dc.identifier.proquest9622988en_US
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