Patent ID: 7218536

Claim:
A converter which includes: two input terminals for receiving an unregulated voltage; two output terminals for the application of a regulated voltage; a wound main transformer presenting a primary winding connected between said input terminals, and presenting a secondary winding connected between said output terminals; a first switching device, a first inductance and a first capacitance forming a first resonant circuit with the primary winding of the main transformer when the first switching device is closed; a wound regulation transformer, presenting a primary winding, and a secondary winding connected in series with one of said windings of the main transformer; said first switching device, a second inductance and a second capacitance forming a second resonant circuit with the primary winding of the regulation transformer and with the said switching device when the second switching device is closed; a command controlling the formation of the first and second resonant circuits at a resonance frequency less than or equal to resonance frequencies of said resonant circuits; and a regulation circuit selectively connecting the primary winding of the regulation transformer between the input terminals.