Valeo Equipements Electriques Moteur

Valeo Equipments Electriques Moteur

François-Xavier Bernard

Hugues Doffin

Michaël Chemin

Christophe Louise

Gilbert Konan

Frédéric Leroux

Jean-Claude Matt

Luc Kobylanski

Ronald Malbranque

Laurent Domenger

Abdelaziz Azizi Samir

Jean-François Duguey

Joachim Laupa

Son Ha Tran

Daniel Pereira

Vincent Romagnolo

Wilfried Carreiro

Nicolas De-Rotalier

The method for controlling a rotating electric machine according to the invention comprises a step of controlling the phase currents of the machine by means of a full-wave control (C). According to the invention, the full-wave control (C) is generated via a pulse width modulated signal of which the signal frequency is greater than an electric frequency of the machine. According to another feature, ascending or descending fronts () of the pulse width modulated signal are synchronised with first and second crossings of first and second angular switching thresholds (S, S) by an electric position (&#x3b8;) of the machine and a duty ratio (&#x3b1;) of the pulse width modulated signal is periodically refreshed to the signal frequency.

Method and device for controlling polyphase synchronous rotary electrical machine, and corresponding reversible electrical machine for motor vehicle

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

The method according to the invention involves limiting the charging of a vehicle alternator by only authorizing progressive augmentation of a current duty cycle (DC) of an excitation signal () of the alternator from an initial duty cycle to an expected duty cycle (EpsU) calculated by a control loop () of the alternator. According to the invention, a complementary limitation of the charging of the alternator involves limiting the increase of the current duty cycle (DC) according to at least one parameter of the heat engine involving an angular acceleration (mot) and/or a rotation speed (Nmot) of the heat motor. In particular, this complementary limitation can additionally involve limiting the increase of the current duty cycle (DC) according to a negative value of the angular acceleration (mot).

Method and system for monitoring progressive charging of automobile alternator, and automobile alternator comprising such a system

A control device ('&#x2033;) for an AC-DC current converter associated with a polyphase synchronous rotary electrical machine. The AC-DC current converter contains, for each phase, a branch of two power switches in series, known as high and low (). The control device (&#x2032;&#x2033;) contains means of generating a signal (&#x3b8;(t)) representing the angular position of the rotor. The control device contains one or more digital tables (H,B) addressed by the signal of the angular position of the rotor (&#x3b8;(t)) and delivering at their outputs binary control signals (H-H,B-B), each controlling one branch of power switches ().

Device for controlling a polyphase synchronous rotary electrical machine and polyphase synchronous rotary electrical machine containing such a device

A device for detecting the angular position of a rotor of a polyphase rotary electrical machine contains a stator and a plurality of magnetic field sensors () delivering first signals (-) representing a magnetic field. The device includes means () for generating, from linear combinations of the first signals, first () and second () sinusoidal signals, phase-shifted by a determined value &#x3c6; representing an angular position of the rotor, referred to as real. The device includes means for detecting a value for an angular position of the rotor referred to as estimated () by locking between the real and the estimated angular positions using a feedback loop known as a 'tracking' loop (--). The device may relate to a polyphase rotary electrical machine containing such a device.

Device for detecting the angular position of a rotor of a polyphase rotary electrical machine and rotary electrical machine containing such a device

A method and system for measuring electric current in a plurality (n) of conductors. According to the invention, the method comprises the following steps: an electric current transducer is place substantially opposite to each conductor (I, i=1, . . . , n); a decorrelation matrix ([G]), which is a function of the position of the transducers in relation to the conductors, is constructed; the current (I) in each conductor (i) is measured with the aid of electric current transducers and real currents (I) are deduced with the aid of the decorrelation matrix ([G]) and the measured currents (I).

Method for measuring electric current in a plurality of conductors

A control and power module for a rotating electrical machine comprising a power circuit containing a number of branches, and a control circuit designed for controlling the power circuit when the machine operates in a nominal mode. The inventive module is characterized in that the control circuit is also designed for monitoring an output voltage from the power circuit and blocking at least one branch of the power circuit in a conduction state when the output voltage reaches an at least first threshold value so that the machine functions in a degraded mode. The invention is for use in an alternator starter.

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Créteil, France

François-Xavier Bernard