Abstract: Disclosed is an electric machine and a traction machine utilizing the electric machine. The electric traction chain includes an electric machine, a plurality of power converters configured to generate AC power signals associated with the various phases of the electric machine, and a plurality of DC power sources. The electric machine includes a rotor and a stator, the stator including at least one winding made from coilings of an insulated conductive material, each winding being associated with one phase of the electric machine, and including a plurality of independently powered coils. Each DC power source of the electric machine is associated with a separate power converter, the coils of a same winding are powered by power signals associated with a same phase generated by the separate power converters.

Abstract: Disclosed is an electric machine and a traction machine utilizing the electric machine. The electric traction chain includes an electric machine, a plurality of power converters configured to generate AC power signals associated with the various phases of the electric machine, and a plurality of DC power sources. The electric machine includes a rotor and a stator, the stator including at least one winding made from coilings of an insulated conductive material, each winding being associated with one phase of the electric machine, and including a plurality of independently powered coils. Each DC power source of the electric machine is associated with a separate power converter, the coils of a same winding are powered by power signals associated with a same phase generated by the separate power converters.

Abstract: A method for producing a monolithic electromagnetic component includes preparing a precursor from a ferrite material during an initial step; preparing elements including at least one coil having coil turns; embedding the elements including at least one coil having the coil turns in the precursor embedded in a mold; co-sintering the elements including at least one coil having the coil turns and the precursor compressed by the mold under a predetermined pressure, the predetermined pressure being generated under a load, wherein a pulsed electric current is generated during the co-sintering; discharging the pulsed electric current through the mold such that a temperature in the mold rises; and obtaining the monolithic electromagnetic component in which the precursor is secured to the elements including at least one coil having the coil turns.

Abstract: A method produces a monolithic electromagnetic component containing elements including a coil with turns and a base made from a ferrite. The method includes obtaining a precursor of the ferrite, depositing a first layer of the precursor in a mold, depositing the elements including the coil on the first layer, depositing a second layer of the precursor on the coil, and co-sintering the first layer, the second layer and the elements in the mold by pressure.

Abstract: A close control of electric power converters includes a diode D1 in parallel with a switch I1; a diode D2 in parallel with a switch I2; a transformer (T1). The switches (I1, I2) are controlled, cyclically repeating the following stages: at a time T0 the switch I1 is switched on; at a time T1 the switch I1 is switched off; the switch I2 is switched on before the current passing through the diode D2 reaches zero; at a time T3 the switch I2 is switched off; and at a time T4, when the diode D1 becomes conductive, the first stage is returned to. In particular, the close control of electric power converters relates to electrically isolated electric power supplies working at high frequency with high efficiency and a high level of integration.

Abstract: Embodiments of the present invention relate to a method and device for regulating a series resonant inverter with controlled rectification. It also relates to a resonant inverter equipped with such a device. The synchronous series resonant inverter includes a primary winding having across its terminals a periodic voltage V(t) of period T, this primary winding being coupled to at least one secondary winding providing the output voltage Vs. The establishment of the current IT(t) in the secondary winding is controlled within the period T. The output voltage Vs is regulated as a function of the phase shift angle ? between the zero crossing of the voltage V(t) across the terminals of the primary winding and the instant of establishment of the current IT(t) in the secondary winding. Embodiments include the production of isolated switched power supplies having a high level of integration, operating at a switching frequency of several megahertz.

Abstract: A method for powering a magnetic coupler, in which: a) each winding of a first magnetic elementary cell is powered such as to produce a magnetizing flux in a bar of the first cell which is joined with a second cell, the fundamental component of which has an angular offset xi; and b) powering each winding of the second cell such as to produce a magnetizing flux in the bar of the second cell which is joined with the first cell, the fundamental component of which has an angular offset xj. The absolute value of the difference between the angular offsets xi and xj is greater than or equal to (I) rad.

Abstract: A method for powering a magnetic coupler, in which: a) each winding of a first magnetic elementary cell is powered such as to produce a magnetizing flux in a bar of the first cell which is joined with a second cell, the fundamental component of which has an angular offset xi; and b) powering each winding of the second cell such as to produce a magnetizing flux in the bar of the second cell which is joined with the first cell, the fundamental component of which has an angular offset xj. The absolute value of the difference between the angular offsets xi and xj is greater than or equal to (I) rad.

Abstract: The invention relates to a method for supply to a magnetic coupler comprising several pairs of windings, each pair being formed from a first and a second adjacent paired winding, magnetically coupled to each other by means of a core of magnetic material. The method further consists of supplying the first winding of each pair with a supply voltage or current out of phase by an angle a with relation to the supply voltage or current for the second winding of the same pair. The absolute value of the angle a is greater than or equal to 4p/N for at least one pair of windings.

Abstract: Embodiments of the present invention relate to a method and device for regulating a series resonant inverter with controlled rectification. It also relates to a resonant inverter equipped with such a device. The synchronous series resonant inverter includes a primary winding having across its terminals a periodic voltage V(t) of period T, this primary winding being coupled to at least one secondary winding providing the output voltage Vs. The establishment of the current IT(t) in the secondary winding is controlled within the period T. The output voltage Vs is regulated as a function of the phase shift angle ? between the zero crossing of the voltage V(t) across the terminals of the primary winding and the instant of establishment of the current IT(t) in the secondary winding. Embodiments include the production of isolated switched power supplies having a high level of integration, operating at a switching frequency of several megahertz.

Abstract: The invention relates to a close control of electric power converters. It comprises: a diode D1 in parallel with a switch I1, a diode D2 in parallel with a switch I2, and a transformer (T1). The switches (I1, I2) are controlled, cyclically repeating the following stages: At a time T0 the switch I1 is switched on. At a time T1 the switch I1 is switched off. The switch I2 is switched on before the current passing through the diode D2 reaches zero. At a time T3 the switch I2 is switched off. At a time T4, when the diode D1 becomes conductive, the first stage is returned to on. In particular, the invention relates to electrically isolated electric power supplies working at high frequency with high efficiency and a high level of integration.

Abstract: The invention relates to a method for supply to a magnetic coupler comprising several pairs of windings, each pair being formed from a first and a second adjacent paired winding, magnetically coupled to each other by means of a core of magnetic material. The method further consists of supplying (in 34) the first winding of each pair with a supply voltage or current out of phase by an angle a with relation to the supply voltage or current for the second winding of the same pair. The absolute value of the angle a is greater than or equal to 4p/N for at least one pair of windings.

Abstract: The invention relates to a method for characterizing a ferroelectric material, comprising application of an electric voltage to a sample of said ferroelectric material, measuring the electric current flowing through said sample, and joint treatment of the applied voltage signal and the measured current signal in order to provide representation data characterizing the polarization of the ferroelectric material. The method also includes controlling the applied electric voltage in such a way that superpositioning can be performed for a first current component having a large signal amplitude at a first frequency and a second current component having a second small signal amplitude at a second frequency which is much greater than the first frequency, and identifying the characteristics of the ferromagnetic material respectively associated with locally reversible polarization effects and locally irreversible polarization effects.

Abstract: The invention relates to a method for characterizing a ferroelectric material, comprising application of an electric voltage to a sample of said ferroelectric material, measuring the electric current flowing through said sample, and joint treatment of the applied voltage signal and the measured current signal in order to provide representation data characterizing the polarization of the ferroelectric material. The method also includes controlling the applied electric voltage in such a way that superpositioning can be performed for a first current component having a large signal amplitude at a first frequency and a second current component having a second small signal amplitude at a second frequency which is much greater than the first frequency, and identifying the characteristics of the ferromagnetic material respectively associated with locally reversible polarization effects and locally irreversible polarization effects.