High frequency partial boost power factor correction control...

Electricity: power supply or regulation systems – In shunt with source or load – Using choke and switch across source

Reexamination Certificate

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Details

C323S285000, C323S301000

Reexamination Certificate

active

07148664

ABSTRACT:
A circuit for providing power factor correction includes a boost converter circuit with a boost inductance and a power factor correction switch and a control circuit. The control circuit provides a pulse width modulated signal to control the on time of a PFC switch, and also includes a power factor correction pulse width modulated device receiving as inputs a rectified AC input voltage, a DC bus voltage, a signal proportional to the current through the inductor and a reference current signal. The power factor correction pulse width modulated device also includes a pulse width modulated generator operable to provide the pulse width modulated signal to control the on time of the PFC circuit and a pulse width modulated blanking device operable to provide an enable/disable signal to disable the pulse width modulated generator when predetermined conditions are met.

REFERENCES:
patent: 5349284 (1994-09-01), Whittle
patent: 5359276 (1994-10-01), Mammano
patent: 6580253 (2003-06-01), Kanakubo et al.
patent: 6657417 (2003-12-01), Hwang
patent: 6781352 (2004-08-01), Athari et al.

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