Patent ID: 7508685

Claim:
A stabilized power supply comprising: a first voltage rectifier circuit connected to an alternating electrical power generator; an inverter circuit connected to the rectifier circuit, the inverter circuit comprising: a switching circuit comprising a plurality of main switches electrically connected with each other to provide a first set of connection midpoints, and a second electrically different set of connection midpoints, the first voltage rectifier circuit connected between the first set of midpoints; an oscillation circuit comprising a resonant circuit connected between the second set of midpoints; and an auxiliary circuit that can be driven and is parallel-connected to the oscillation circuit; a transformer connected to the inverter; wherein the transformer is series-connected with the resonant circuit; and a second rectifier circuit to rectify the alternating signal observable at an output of the transformer; wherein the auxiliary circuit comprises a set of two series-connected assistance circuits that define first and second assistance circuits, each assistance circuit comprising a transistor and a diode connected in parallel, the auxiliary circuit being configured such that a current I 1 can flow in a first direction through the transistor of the first assistance circuit and the diode of the second assistance circuit when the transistor of the first assistance circuit is closed, and such that a current I 2 can flow in a second opposite direction through the transistor of the second assistance circuit and the diode of the first assistance circuit when the transistor of the second assistance circuit is closed.