Patent ID: 6359422
Filing Date: 2002-03-19
Classification: H02J,Y02E,Y02P

Abstract:
A power-factor correction arrangement, comprising:a) an active source of variable inductance; b) a first switching circuit switchable between open and closed states, and operative for switchably connecting the active source in parallel across a supply of AC power in the closed state of the first switching circuit, the first switching circuit being connected to the active source at a first switching junction; c) a passive source of capacitance; d) a second switching circuit switchable between open and closed states, and operative for switchably connecting the passive source in parallel across the supply of AC power in the closed state of the second switching circuit while the first switching circuit is in the closed state of the first switching circuit, thereby drawing a surge electrical current through the passive source, the second switching circuit being connected to the passive source at a second switching junction; and e) a surge resistance interconnected between the first and second switching junctions, and operative for reducing the surge current to protect the passive source.