Power factor correction converter

Details Power factor correction converter Power factor correction converter

2011-04-05

2011-04-05

Riley, Shawn (Department: 2838)

Electricity: power supply or regulation systems

For reactive power control

Using converter

C323S222000, C363S127000

Reexamination Certificate

active

07919950

ABSTRACT:
A power factor correction converter includes a diode bridge arranged to perform full-wave rectification on an AC input power supply, a switching element arranged to perform switching on an output voltage thereof, an inductor arranged to pass a current interrupted by the switching element and to accumulate and emit excitation energy, a diode, and a smoothing capacitor defining a step-up chopper circuit. A digital signal processing circuit detects a phase of an input voltage, and a switching frequency of the switching element is modulated in accordance with the phase. Accordingly, the switching frequency can be appropriately modulated without depending on an input voltage, so that a wide range of input voltages can be accepted while suppressing EMI noise with a peak generated in the switching frequency and higher-order frequency components thereof.

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Offical Communication issued in International Patent Application No. PCT/JP2008/056772, mailed on Jul. 15, 2008.

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