Patent ID: 8787053

Claim:
A close control comprising: a control voltage (V Cde ) to at least one electric power converter, a continuous input voltage (V e ) between a point A and a point B, a first diode in parallel with a first switch, an anode of the first diode being connected to point B, a cathode of the said diode being connected to a point E; a second diode in parallel with a second switch, an anode of the second diode being connected to point B, a cathode of the said second diode being connected to a point F; a transformer comprising a first primary coil connected between point A and a point G, a second primary coil connected between point A and the point F, and a secondary coil, said transformer providing a voltage between a point H and a point D, wherein a number of turns of the first primary coil is equal to the number of turns of the second primary coil, wherein the point E is connected to the point G by a first capacitor; a second capacitor connected between point H and a point I, a third capacitor connected between said point I and point C, a third diode connected between point I and a point J, the anode of the third diode being connected to point I, the cathode of said third diode being connected to said point J, a resistor connected between point J and point C, a fourth diode connected between point J and point D, the anode of the fourth diode being connected to the point D, the cathode of the fourth diode being connected to the point J, point E and point G being electrically connected to one another, as well as point H and a point C, the first and second switches being controlled according to a cyclic sequence comprising the following stages: at a time T 0 the first switch is switched on; at a time T 1 the first switch is switched off; the second switch is switched on before the current passing through the second diode reaches zero; at a time T 3 the second switch is switched off; and at a time T 4 , when the first diode becomes conductive, the first stage is returned to.