Close control of electric power converters

A close control comprising:

• a control voltage (VCde) to at least one electric power converter,
• a continuous input voltage (Ve) 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 T0 the first switch is switched on;
• at a time T1 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 T3 the second switch is switched off;
• and
• at a time T4, when the first diode becomes conductive, the first stage is returned to.