Centre National De La Recherche Scientifique

Thales

Institut National Polytechnique De Toulouse

Universitè De Montpellier

Sorbonne Université

Saft

Université Paris-saclay

Psa Automobiles Sa

Ecole Normale Superieure De Cachan

Centralesupelec

University Montpellier 2, Sciences Et Techniques

Centre National De La Recherche Scientifique-cnrs

Université Montpellier 2 Sciences Et Techniques

Ecole Normale Superieure Paris-saclay

Eric Laboure

Thierry Meynard

Philippe Claude Thomas

Jean-Michel Jarrousse

François Forest

Francis Roy

Frederic Richardeau

Thomas Peuchant

Emmanuel Hoang

Vincent Loyau

David Herpe

Frédéric Mazaleyrat

Karim Zehani

Lionel Cima

Franck Castejon

Thierry Antoine Meynard

Jean-Michel Jarousse

The invention relates to a device forming a DC voltage bus for a polyphase electrical system (M), comprising voltage legs (A, A, A) each having a plurality of battery cell modules (C, C, C), each module comprising a battery cell or a cluster of battery cells (c), connected to a DC-to-AC converter (DCAC); said battery cell modules (C, C, C) being connected together in series via the DC-to-AC converter (DCAC); said voltage legs (A, A, A) each being connected to a specific phase leg (B, B, B) for said polyphase electrical system (M), at least one phase leg (B, B, B) having a branch (D, D, D) connected to a rectifier module (R). The invention also relates to a motor vehicle, a renewable energy generator and a method based on such a system.

Device for creating a DC voltage bus for a polyphase electrical system, motor vehicle and renewable energy generator comprising such a device

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.

Electric machine supplied at low voltage and associated multicellular power train

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.

Method for producing a monolithic electromagnetic component

A close control of electric power converters includes a diode Din parallel with a switch I; a diode Din parallel with a switch I; a transformer (T). The switches (I, I) are controlled, cyclically repeating the following stages: at a time Tthe switch Iis switched on; at a time Tthe switch Iis switched off; the switch Iis switched on before the current passing through the diode Dreaches zero; at a time Tthe switch Iis switched off; and at a time T, when the diode Dbecomes 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.

Close control of electric power converters

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 I(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 &#x3b4; between the zero crossing of the voltage V(t) across the terminals of the primary winding and the instant of establishment of the current I(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.

Method and device for regulating a resonant inverter equipped with such a device

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 x; 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 x. The absolute value of the difference between the angular offsets xand xis greater than or equal to (I) rad.

Method for powering a magnetic coupler and device for powering an electric dipole

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.

Method and device for supply to a magnetic coupler

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. The invention can be used for scientific instrumentation equipment and in material production lines.

Method and device for characterizing ferroelectric materials

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Cachan, France

Eric Laboure