Patent ID: 6442052
Filing Date: 2002-08-27
Classification: H02M,Y02B

Abstract:
A high efficiency power converter, comprising:a preregulator circuit, couplable to a source of DC power, that provides a regulated intermediate DC voltage, wherein said preregulator circuit includes: a regulator switching device coupled to said source of DC power; and a regulator inductor, coupled to said preregulator switching device; and a low impedance output stage, coupled to said preregulator circuit, including: first and second power transformers, wherein each of said first and second power transformers having first and second primary windings of opposite polarity and a secondary winding; first and second switches that alternatively couple said first primary windings of said first and second power transformers, respectively, to said intermediate DC voltage; and first and second coupling capacitors that couple said second primary windings of said first and second power transformers to said second and first switches, respectively, to reset said first and second power transformers with minimum losses.