Patent ID: 7656137
Filing Date: 2010-02-02
Classification: H02M

Abstract:
1. A chopping converter supplied by a positive voltage and a negative voltage with respect to earth, and delivering an output voltage between a first output terminal and a second output terminal, the latter terminal being directly connected to earth or through a resistor, comprising three windings wound around a magnetic core, a first and a second of said windings being mounted in series and wound in opposition, their shared ends, or firsts ends, being connected to earth, the second end of the first winding being connected to the positive voltage through the intermediary of a first diode inversely mounted in relation to the positive voltage, the second end of the second winding being connected to the negative voltage through the intermediary of a second diode inversely mounted in relation to the negative voltage, the third winding having a first end connected to a mid point of a branch connecting the positive voltage to the negative voltage, the part of branch connecting the mid point to the positive voltage comprising, arranged in series, a first switch forming means and a third diode directly mounted in relation to the positive voltage, and together forming a unidirectional switch with direct and inverse blocking capability, the part of the branch connecting the mid point to the negative voltage comprising, arranged in series, a second switch forming means and a fourth diode directly mounted in relation to the negative voltage, and together forming a unidirectional switch with direct and inverse blocking capability, the second end of the third winding being connected to the first output terminal, the third winding having a number of turns greater than the number of turns of the first winding and greater than the number of turns of the second winding.