Method and apparatus for synchronous sine wave dimming of luminaries
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United States of America Patent
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Jan 27, 2015
Grant Date -
Jul 18, 2013
app pub date -
Jul 26, 2011
filing date -
Jul 27, 2010
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Abstract
A luminary dimming system having a three terminal dimming unit. The dimming unit includes a power controller and a receiver and is responsive to dimming directives received by the receiver. The power controller controls a buck switch and a freewheel switch in a manner that allows reduction of alternating current voltages. Such voltage reduction is accomplished in a manner that preserves the waveform of the source voltage and the power factor exhibited by the luminary.
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