Abstract: A supply generator for an oscillating circuit, includes an inductance (L) and a resonant capacitor (C3, C4), for operation at a fixed frequency and also includes at least one pair of transistors (I2, I2), operated on a variable cyclic regime for modifying the power. The generator includes a first diode (D5) between a first transistor (I2) and the supply for the generator and a second diode (D4) between the junction point of the inductance (L) and the resonant capacitor (C3, C4) and the junction point of the first transistor (I2) and the first diode (D5). The invention is of particular use for supply of the cooking rings on an induction cooking hob.

Abstract: A supply generator for an oscillating circuit, includes an inductance (L) and a resonant capacitor (C3, C4), for operation at a fixed frequency and also includes at least one pair of transistors (I2, I2), operated on a variable cyclic regime for modifying the power. The generator includes a first diode (D5) between a first transistor (I2) and the supply for the generator and a second diode (D4) between the junction point of the inductance (L) and the resonant capacitor (C3, C4) and the junction point of the first transistor (I2) and the first diode (D5). The invention is of particular use for supply of the cooking rings on an induction cooking hob.

Abstract: An induction heating device for heating cooking vessels includes at least three concentric inductors and implements a step of heating a load. For a load covering at least three inductors, at least one intermediate inductor that is covered and that is determined in such a manner as to homogenize the input of heat to the load is not energized during the heating step. Applications of the device include domestic hot plates.

Abstract: An induction heating device for heating cooking vessels includes at least three concentric inductors and implements a step of heating a load. For a load covering at least three inductors, at least one intermediate inductor that is covered and that is determined in such a manner as to homogenize the input of heat to the load is not energized during the heating step. Applications of the device include domestic hot plates.

Abstract: An inverter power supply device designed to supply power to a resonant circuit, includes a generator, having at least one switch series-connected with the resonant circuit and a freewheeling diode parallel-connected with the switch, the switch being controlled by a periodic signal with a frequency known as a working frequency. The device furthermore includes first device providing a measurement of the instantaneous current flowing in the resonant circuit; second device to deduce the maximum current (I.sub.max) from the instantaneous current; third device to deduce the current known as the switching current from the instantaneous current, this switching current being the current for which the switch or the freewheeling diode that is associated with it becomes conductive (I.sub.commut); first control device for the switch, receiving the maximum current(I.sub.max), the switching current (I.sub.

Abstract: The disclosed induction cooking range comprises, in the commonly known way, an upper plate made of glazed ceramic designed to receive a receptacle to be heated made of ferrite material, a monoconductor induction coil positioned beneath the upper plate on a coil support and excited by a high-frequency current generator. The induction coil is allowed to heat by its own losses to a temperature greater than that of the receptacle and the induction coil communicates its own heat to the receptacle. The overall efficiency of the range is thus appreciably increased. The induction coil, which must then tolerate a high temperature, is made out of a flat, monoconductor strip placed between two sheets of mica.

Abstract: In a device for the control of a circuit comprising a resonance inverter power supply for at least one load comprising an inductive component, the inverter power supply comprises at least two switches (Q.sub.1, Q.sub.2) mounted between the terminals of a DC voltage supply. The device has a current transformer (TR) comprising a primary winding (TRp) series-connected between the load and the common junction point between the switches (Q.sub.1, Q.sub.2), the freewheeling rectifiers (D.sub.1, D.sub.2) and the snubber capacitors (C.sub.1, C.sub.2); a first secondary winding (TR.sub.S1) connected between the emitter of one (Q.sub.1) of the two switches and the first terminal of a first DC supply (E.sub.1), the second supply terminal being connected to the base of the switch (Q.sub.1); a second secondary winding (TR.sub.S2) connected between the emitter of the other switch (Q.sub.2)and the first terminal of a second DC supply (E.sub.2), the second supply terminal being connected to the base of this other switch (Q.