Electricity: power supply or regulation systems – For reactive power control – Using converter
Patent
1993-10-12
1996-02-06
Wong, Peter S.
Electricity: power supply or regulation systems
For reactive power control
Using converter
323222, 323299, 363 81, 363 89, G05F 500, H02M 3156
Patent
active
054898374
ABSTRACT:
An AC-DC converter of a type having an improved power factor having an arrangement that enlargements of loads to be borne by circuit components due to AC input voltage is prevented so that the size and cost of the AC-DC converter are reduced. A constant-current circuit is, in parallel, connected to a voltage dividing point of charge voltage of an output capacitor to be connected to an input terminal of an error amplifier of a booster converter circuit and realized by a plurality of resistors so that control of a constant-current value of the constant-current circuit is performed with the rectified output from the rectifying circuit. As a result, the loads to be borne by the circuit components of the AC-DC converter can be made constant regardless of the supplied AC voltage level so that the size and cost of the AC-DC converter are reduced.
REFERENCES:
patent: 4691159 (1987-09-01), Ahrens et al.
patent: 5289361 (1994-02-01), Vinciarelli
patent: 5301095 (1994-04-01), Teramoto et al.
patent: 5365420 (1994-11-01), Cadman
Berhane Adolf
Toko Inc.
Wong Peter S.
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