Centre National De La Recherche Scientifique

Peugeot Citroen Automobiles Sa

Cnrs

Ecole Normale Superieure De Cachan (lesir)

Michel Lecrivain

Mohamed Gabsi

Jean Lucidarme

Hamid Ben Ahmed

Christophe Fageon

Emmanuel Sedda

Bernard Multon

Laurent Prevond

Emmanuel Hoang

Abdelhamid Ben Ahmed

Eduardo Santander

Victor Moynot

Franck Chabot

Sami Hlioui

Mohamed Gasbi

The present invention essentially relates to an electric machine () with homopolar double excitation, comprising a rotor particularly consisting of a central portion () made of a solid magnetic material and a laminated annular portion () located at the periphery of the solid portion. In addition, the rotor comprises permanent magnets (), the magnetization thereof being radially oriented relative to the axis () of the rotor (), and separated from one another such that the double excitation flow generated by the field coils () can enter the rotor () via the flanges () of the rotor, and come back out via the spaces between the magnets (), or vice-versa.

Rotating electric machine with homopolar double excitation

The present invention pertains to an electromechanical actuator controlling a valve of an internal combustion engine by means of a first magnetic field, generated in a variable manner by an electromagnet, and a second magnetic field, generated by at least one magnet associated with the electromagnet. According to the present invention, the actuator is characterized in that it comprises at least one connecting part forming a magnetic circuit facilitating the passage of the flux generated by the electromagnet for part of the field generated by the magnet, the connecting part being magnetically saturated by the partial field of the magnet.

Electromagnetic actuator for controlling a valve of an internal combustion engine and internal combustion engine equipped with such an actuator

A valve actuator for internal combustion engines, includes at least one electromagnet and a magnetic plate, whose movement controls the displacement of the valve. The parameters of the electromagnet and of the plate are such that at least part of the magnetic circuit formed by the electromagnet and the magnetic plate is in a state of magnetic saturation when the magnetic plate is located in the proximity of the electromagnet. The magnetic circuit is preferably in the state of magnetic nonsaturation when it is located at a distance from the electromagnet. According to one embodiment, the magnetic plate has at least one contracted part intended to be saturated when this plate is located in the proximity of the electromagnet.

Electromechanical valve control actuator for internal combustion engines

A rotating electric machine whereof the rotor includes a magnetic core provided with radial teeth, uniformly distributed at its periphery, annular magnets arranged on either side of the core axial ends and magnetic end flanges pressing the annular magnets against the core, magnetic bars linking the end flanges together, housed in the spaces between the radial teeth, additional magnets being interposed between each of the bars and at least the side walls of the core radial teeth defining the spaces. The stator includes a magnetic core, excitation coils arranged on either side of the core, a stator coil wound on the core and a magnetic ring in contact with the core and provided with radial rims co-operating with the axial rims of the rotor end flanges to form paths for the return flux.

Rotating electric machine with improved double excitation

A double excitation, rotating electrical machine mounted on a shaft includes a rotor whereof the magnetic circuit carries at least one excitation element and a stator whereof the magnetic circuit carries a stator coil. The at least one excitation element includes at least a ring-shaped magnet associated with at least two disks each provided with radial teeth evenly distributed at their periphery and at least a ring-shaped part provided with slots in each of which is engaged contactless, one tooth of at least one toothed disk, and the stator magnetic circuit includes an even number, not less than two, of ring-shaped elements of magnetic circuit, at least an excitation stator coil being arranged between at least two neighboring elements among the magnetic circuit elements.

Electrical machine with double excitation

Electromechanical converter device, producing linear motion

Growing community of inventors

Ivry sur Seine, France

Michel Lecrivain