Average current-mode control and charge control for PWM converters

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dc.contributor.authorTang, Weien
dc.contributor.committeechairLee, Fred C.en
dc.contributor.committeememberArndt, Richard A.en
dc.contributor.committeememberBorojević, Dušanen
dc.contributor.committeememberChen, Dan Y.en
dc.contributor.committeememberJovanovic, Milan M.en
dc.contributor.departmentElectrical Engineeringen
dc.date.accessioned2014-03-14T21:30:58Zen
dc.date.adate2009-03-04en
dc.date.available2014-03-14T21:30:58Zen
dc.date.issued1994en
dc.date.rdate2009-03-04en
dc.date.sdate2009-03-04en
dc.description.abstractTwo control schemes for PWM converters, average current-mode (ACM) control and charge control, are studied in this dissertation. The small-signal models are derived for continuous-conduction mode PWM converters employing these two controls. Sampled-data modeling is applied to the current loop modeling, and the obtained models are accurate up to half the switching frequency. The relationships between current loop instability and converter operating conditions for both controls are found for the first time. The derived models are verified by both time-domain simulations and experiments. The models can be used for both voltage loop and current loop analysis and designs. Comprehensive design guidelines for PWM converters with both controls are also provided. The small-signal characteristics of these two controls are compared with those of peak current-mode control. The applications of ACM control and charge control to power factor correction (PFC) circuits are studied. Charge control is applied to continuous-conduction mode flyback converter to achieve a single-stage PFC. The current loop instability in PFC circuit and its effect on the input EMI filter design are investigated. The trade-off between the current loop stability nlargin and line current distortion is also discussed.en
dc.description.degreePh. D.en
dc.format.extentxiii, 175 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.identifier.otheretd-03042009-041130en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-03042009-041130/en
dc.identifier.urihttp://hdl.handle.net/10919/41423en
dc.language.isoenen
dc.publisherVirginia Techen
dc.relation.haspartLD5655.V856_1994.T374.pdfen
dc.relation.isformatofOCLC# 32772298en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V856 1994.T374en
dc.subject.lcshElectric current convertersen
dc.titleAverage current-mode control and charge control for PWM convertersen
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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