Valeo Equipements Electriques Moteur

Valeo Embrayages

Christophe Louise

Jean-Marie Pierret

Hugues Doffin

François-Xavier Bernard

Jean-Claude Matt

Raymond Rechdan

Luc Kobylanski

Philippe Masson

Ronald Malbranque

Régis Seidenbinder

Cyril Granziera

Abdelaziz Azizi Samir

Gael Blondel

Gaël Blondel

Guillaume Boidin

Ye Jin Jin

The Dung Nguyen

Nicolas De-Rotalier

Paul Armiroli

The method according to the invention is implemented in an alternator-starter () comprising phase windings (u,v,w) connected to an inverter () linked to an onboard electrical network () powered by a battery for operation as a starter. The invention involves controlling the inverter in a chopped full-wave control mode when the rotational speed (&#x3a9;) of the alternator-starter is lower than at least a threshold speed and in a full-wave control mode when the rotational speed is higher than the threshold speed. According to a specific embodiment, the switching between the chopped full-wave control mode and the full-wave control mode takes place according to a hysteresis cycle using two predefined threshold speeds.

Method and device for controlling an alternator-starter of a motor vehicle, and corresponding alternator-starter

The signalling method is implemented in an electronic power system () of a multiple-phase alternator. The system () is of the type comprising a set of rectifiers () capable of rectifying the voltage of phases (Ph, Ph, Ph, Ph, Ph, Ph) produced by the alternator, and a control assembly () capable of controlling an excitation current from the alternator, of monitoring the conformity of at least one current characteristic of at least one (Ph) of the voltage of phases (Ph, Ph, Ph, Ph, Ph, Ph) in relation to a nominal characteristic, and of signalling any non conformity. In accordance to the method of the invention, the non conformity of at least one current characteristic of at least one (Ph) of the voltage of phases (Ph, Ph, Ph, Ph, Ph, Ph) is simulated in case of impaired function of at least one of the rectifiers (). The invention thus permits the use of signalling means provided in an existing regulator to signal additional impaired functions which were not initially processed by the signalling means.

Signaling method and device for impaired function of an electronic power system in a multiple-phase alternator

The regulating method is employed in a polyphase rotating electrical machine operating as a generator and having an excitation coil (). The method is of the type in which a DC voltage (B+) is slaved to a predetermined setpoint, the voltage being produced by rectifying an AC voltage generated by the machine by controlling the duty cycle of a periodic excitation current (+EXC,&#x2212;EXC) by means of a microcontroller (), or the like, as a function of sampled values of the DC voltage (B+). The duty cycle is determined by the microcontroller () twice during an excitation current cycle (+EXC, &#x2212;EXC).

Method and device for regulating a polyphase rotating electrical machine operating as a generator, and polyphase rotating electrical machine using them

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 for operating a reversible polyphase rotating electrical machine () in a motor vehicle, which consists in performing the high-level and low-level management of the machine with a remote-control unit (), which exchanges physical data, via a plurality of links (), with a power module () integrated in or immediately proximate the machine (). The method and electrical machine may be an alternator-starter.

Method for operating a motor vehicle alternator-starter

A control and power module for a rotating electric machine comprising a bridge of switches, a plurality of driver circuits for driving a bridge of switches, a control circuit and a plurality of communication connections between driver circuits and a control circuit. When the machine is in a rest mode, at least one connection of the plurality of communication connections is used for transmitting signals between the control circuit and the driver circuits for carrying out a function related to the rest mode of the machine, and when the machine is in the operational mode, all connections of the plurality of communication connections are used for transmitting signals between the control circuit and the driver circuits.

Control and power module for a rotating electric machine

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Alfortville, France

Christophe Louise