Method of power conversion and apparatus which achieves high power factor correction using ripple current mode control

A ripple current mode power converter comprised of a magnetic energy storage element, and a method of determining magnetic storage element charge duration based on periodic magnetic storage element current samples. In the preferred embodiment a controller processes a magnetic storage element ripple...

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Bibliographic Details
Main Author COLEMAN EDWARD PAUL
Format Patent
LanguageEnglish
Published 01.01.2008
Subjects
CONTROLLING
PHYSICS
REGULATING
SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
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Summary:A ripple current mode power converter comprised of a magnetic energy storage element, and a method of determining magnetic storage element charge duration based on periodic magnetic storage element current samples. In the preferred embodiment a controller processes a magnetic storage element ripple current, and average sampled current, to achieve high power factor forgoing the need to sense the AC signal current and voltage levels. The controller element periodically calculates the magnetic storage element charge duration to control the state of the switch element to maintain the AC input current proportional to the AC input voltage.
Bibliography:Application Number: US20060393562