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dc.date.accessioned2016-08-24T17:54:05Zen
dc.date.available2016-08-24T17:54:05Zen
dc.date.issued1999-07-06en
dc.identifier.urihttp://hdl.handle.net/10919/72392en
dc.description.abstractA method for preparing power factor control integrated circuits which generate linear pulse width modulation (PWM) waveforms is presented. The method of pulse width modulation waveform generation involves providing a capacitor; fast charging the capacitor; and controlling a discharge rate of the capacitor to ensure a constant switching period and a linear PWM waveform. The method is applicable for any single-phase ac/dc converter topology that performs power factor correction. Unlike conventional techniques which utilize three feedback loops, the method of the present invention reduces the total number of feedback loops to two, eliminates input voltage sensing and achieves the same objective. This method results in significant integrated circuit simplification, such as elimination of multiplier, squarer and divider circuits in the control integrated circuit and reduces the cost of the integrated circuit.en
dc.format.mimetypeapplication/pdfen
dc.language.isoen_USen
dc.publisherUnited States Patent and Trademark Officeen
dc.titleMethod and apparatus for automatic average current mode controlled power factor correction without input voltage sensingen
dc.typePatenten
dc.identifier.urlhttp://pimg-fpiw.uspto.gov/fdd/71/204/059/0.pdfen
dc.date.accessed2016-08-19en
dc.type.dcmitypeTexten
dc.contributor.assigneeSGS-Thomson Microelectronics S.R.L.en
dc.contributor.assigneeVirginia Tech Intellectual Properties, Inc.en
dc.contributor.inventorLee, Fred C.en
dc.contributor.inventorRajagopalan, Jayendaren
dc.contributor.inventorNora, Paoloen
dc.date.filed1997-08-29en
dc.identifier.applicationnumber8921062en
dc.subject.uspc323/288en
dc.subject.uspcother363/89en
dc.subject.uspcother363/48en
dc.subject.uspcother363/80en
dc.subject.cpcH02M1/4225en
dc.subject.cpcY02B70/126en
dc.type.patenttypeutilityen
dc.identifier.patentnumber5920471en


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