Patent ID: 6639815
Filing Date: 2003-10-28
Classification: H02M,H03F,Y02B

Abstract:
Switching power apparatus providing an AC output voltage in response to an AC input signal comprising:a power supply means for providing at least one supply voltage; a first and second inductive means for attaining a first and second corrective currents, and providing a first and second return voltages respectively; a first and second rectifying means for limiting the first and second return voltages respectively; a capacitive means for providing the AC output voltage; a first switching means having a first reference terminal and a first supply terminal, and coupled in series with the first inductive means for selectively applying the first corrective current between the power supply means and the capacitive means; a second switching means having a second reference terminal and a second supply terminal, and coupled in series with the second inductive means for selectively applying the second corrective current between the power supply means and the capacitive means; and a converter means having a first and second input terminals for converting a voltage appearing therebetween and providing a supply current to at least one supply terminal, wherein the first input terminal is coupled to one of the terminals of the first switching means and the second input terminal is coupled to one of the terminals of the second switching means.