Electricity: power supply or regulation systems – For reactive power control – Using impedance
Patent
1994-11-10
1997-07-01
Riley, Shawn
Electricity: power supply or regulation systems
For reactive power control
Using impedance
323222, 323243, 323288, G05F 170
Patent
active
056442149
ABSTRACT:
A continuous current type power factor correction circuit in a power device having rectifying means for rectifying an alternating current, a booster converter having an inductor, a diode and a capacitor series connected to an output terminal of the rectifying means, a control switch connected in parallel with the series connection of the diode and capacitor, and a load connected across the capacitor for outputting a boosted direct current to the load according to switching operation of the control switch, and a power factor correction circuit controlling the switching operation of the control switch, the power factor correction circuit, comprising; an off-time controller comparing a first voltage signal with a second voltage signal and generating an off signal in response to the comparison, an on-time controller generating an on signal in accordance with a charge time period of the capacitor, the charge time period being determined from a point in time wherein the off-time controller generates the off signal, and a drive signal generator, respectively receiving the off and on signals, latching the off and on signals, and generating a drive signal which controls operation of the control switch.
REFERENCES:
patent: 5003454 (1991-03-01), Bruning
patent: 5367247 (1994-11-01), Blocher et al.
patent: 5371667 (1994-12-01), Nakao et al.
Riley Shawn
Samsung Electronics Co,. Ltd.
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