A turn-off relief network for a direct voltage converter includes a transformer having a primary winding. At least one clocked power transistor is connected in series with the primary winding. A first series circuit connected parallel to the primary winding includes a diode and a capacitor. A second series circuit connected parallel to the capacitor includes a reversing inductor, a reversing diode for a capacitor voltage and another transistor.
A power supply assembly is disclosed which includes a resonant static converter of the Zero Voltage Switching type having a mono-switch at the primary and a rectifier circuit at the secondary; it further includes an auxiliary voltage booster rectifier circuit and a starting circuit for a load such as a gas discharge lamp.
An electrical device for use with a transformer whose primary 2 is supplied under the control of a transistor acting as a high frequency chopper, and from which the secondary delivers a low voltage of continuous shape under control of a first diode 5. In parallel with the primary 2, are arranged a diode 9 and a condenser 10. In parallel with the diode 9 are arranged a resistance 11, a transistor 12 and a diode 13. The leakage inductance energy of the primary 2 is stored in the condenser 10 and recovered in the primary 2 for use in the secondary.
