A new small-signal model for current-mode control

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dc.contributor.authorRidley, Raymond B.en
dc.contributor.committeechairLee, Fred C.en
dc.contributor.committeememberVorperian, Vatcheen
dc.contributor.committeememberCho, Bo H.en
dc.contributor.committeememberChen, Dan Y.en
dc.contributor.committeememberNelson, Douglas J.en
dc.contributor.departmentElectrical Engineeringen
dc.date.accessioned2014-03-14T21:16:43Zen
dc.date.adate2008-07-28en
dc.date.available2014-03-14T21:16:43Zen
dc.date.issued1990en
dc.date.rdate2008-07-28en
dc.date.sdate2008-07-28en
dc.description.abstractA new small-signal model is developed for pulse-width-modulated converters operating with current-mode control. Four different control schemes are analyzed, all of which use the instantaneous value of the inductor current as part of the control modulation. Continuous-conduction mode and discontinuous-conduction mode models are provided. Sampled-data modeling is applied to the current-mode cell which is common to all converters, and the important results obtained are simplified to give a powerful model for analysis and design. The new model explains all of the observed phenomena of current-mode control, including the subharmonic oscillation which can occur with constant-frequency modulation. It is shown that the model provides transfer functions with three poles for two-state converters. Predictions of the new model are accurate to half the switching frequency.en
dc.description.degreePh. D.en
dc.format.extentxii, 197 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.identifier.otheretd-07282008-135124en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-07282008-135124/en
dc.identifier.urihttp://hdl.handle.net/10919/38935en
dc.language.isoenen
dc.publisherVirginia Techen
dc.relation.haspartLD5655.V856_1990.R546.pdfen
dc.relation.isformatofOCLC# 23716378en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V856 1990.R546en
dc.subject.lcshElectric current convertersen
dc.titleA new small-signal model for current-mode controlen
dc.typeDissertationen
dc.type.dcmitypeTexten
thesis.degree.disciplineElectrical Engineeringen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.leveldoctoralen
thesis.degree.namePh. D.en

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