Patent ID: 6069800
Filing Date: 2000-05-30
Classification: H02M,Y02B,Y02P

Abstract:
A line harmonic correcting power converter with single stage DC to DC conversion, comprising:first and second AC input terminals;b) a rectifier circuit arranged to convert an AC voltage applied to said AC input terminals to unsmoothed DC and to apply the same to a DC input having a positive and a negative terminal;c) a first capacitor connected across said DC input in series with a first diode;d) a transformer connected to said DC input, said transformer including:i) a primary winding connected across said DC input in series with a first switch;ii) first and second secondary windings;iii) said second secondary winding being connected to a rectifying and filtering circuit including a second diode and a second capacitor, said circuit being arranged to convert the current induced in said second secondary winding into smooth DC;e) a pulse generator arranged to turn said first switch on and off at high frequency; andf) a second switch, said first secondary winding being connected in series with said second switch between one of said terminals of said DC input and the junction between said first capacitor and said first diode;wherein said first secondary winding is configured to recharge said first capacitor.