Valeo Equipements Electriques Moteur

Gilbert Konan

François-Xavier Bernard

Michaël Chemin

Frédéric Leroux

Joachim Laupa

Ludovic Bodin

Laurent Domenger

Abdelaziz Azizi Samir

Jean-François Duguey

Daniel Pereira

Son Ha Tran

The invention mainly relates to a method for controlling a rotating electrical machine () interacting with a motor vehicle gearbox (), characterized in that, during a phase of synchronization between two speed ratios (R-Rn) during which the rotating electrical machine () is controlled for speed and there is a change of the type of modulation with transition from modulation of the full-wave type (FW) to pulse-width modulation (PWM), said method comprises a control step with the aim of limiting the variations of an output current of an inverter during the phase of change of the type of modulation without compensation of torque variations.

Method for controlling a rotating electrical machine on changing from modulation of the full-wave type to pulse-width modulation

The device according to the invention controls a polyphase inverter () intended for powering from a DC current source (CC) a polyphase rotating electric machine (). The device is of the type of those generating commutation functions driving commutation elements () of the inverter in such a way as to obtain a reduction of the losses in the commutation elements and a decrease of an effective current in a decoupling capacitor () of the source (CC). According to the invention, this reduction and this decrease are obtained by means of a set of control strategies () determining the commutation functions by using additional degrees of freedom of the polyphase machine () with respect to a three-phase reference machine. The polyphase machine comprises first and second phase windings forming a first three-phase system () and a second three-phase system () with distinct neutral points () offset angularly by a predetermined angle of offset (&#x398;). The first and second phase windings are linked respectively to three first and three second power arms () formed by the commutation elements.

Device for controlling a polyphase inverter

A device for determining the position of the rotor of a rotating electrical machine. The invention is characterized in that the device comprises a plurality of magnetic field sensors stationary relative to the stator and adapted to deliver multiphase electric signals representing a magnetic field detected by the sensors, and means for processing the multiphase electric signals by an operator capable of providing diphase signals depending on the position of the rotor. The invention is applicable to rotating electrical machines used in the automotive industry.

Device for controlling a rotating electrical machine

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Créteil, France

Gilbert Konan