Valeo Equipements Electriques Moteur

Philippe Masson

Michaël Chemin

Jean-Claude Matt

Pierre Sardat

Bruno Dessirier

Thierry Mandion

Serge Newiadomy

Jean-Marie Pierret

Luc Kobylanski

Christophe Louise

Marc Ranier

Ronald Malbranque

Benoit Soucaze-Guillous

Damien Chaumat

Gaël Blondel

The Dung Nguyen

The method of controlling a polyphase rotating electric machine, the machine operating as a generator and being linked to an electrical network (), is of the type of those consisting in short-circuiting at least one phase winding in the event of load shedding. A short-circuit command (SAND) is generated for the phase winding when a first measurement voltage V of a voltage B+ of the network exceeds a first predetermined threshold value V1 and when a phase current (I&#x3a6;) in the phase winding vanishes and changes direction. The first measurement voltage V may be obtained by filtering the voltage B+ of the network with a predetermined time constant TF.

Method of controlling a rotating electric machine, control system and rotating electric machine corresponding thereto

A method of controlling a supercapacitor energy storage unit (), included in a motor vehicle micro-hybrid system, is disclosed. The storage unit is suitable for performing the functions of an alternator, starter and automatic stop-restart of the vehicle heat engine, regenerative braking and torque assistance. The energy storage unit () is a plurality of supercapacitor elementary cells connected in series (Cto C) and capable of delivering information (Vmax, Temp and DeltaV) on its internal status. The method includes various stages of: comparing a maximum elementary voltage (Vmax) with a first voltage threshold (Vmax); comparing a temperature (Temp) with at least one temperature threshold (ST=55&#xb0; C., ST=65&#xb0; C. and ST=70&#xb0; C.); and, deciding on limitations of the availability of functions of the unit when the (Vmax) information reaches threshold (Vmax) for a predetermined duration (T) and/or when the (Temp) information reaches the temperature threshold (ST=55&#xb0; C., ST=65&#xb0; C. and ST=70&#xb0; C.).

Method of controlling an energy storage unit in a vehicle micro-hybrid system

A method of controlling a supercapacitor energy storage unit (), included in a motor vehicle micro-hybrid system, is disclosed. The storage unit is suitable for performing the functions of an alternator, starter and automatic stop-restart of the vehicle heat engine, regenerative braking and torque assistance. The energy storage unit () is a plurality of supercapacitor elementary cells connected in series (Cto C) and capable of delivering information (Vmax, Temp and DeltaV) on its internal status. The method includes various stages of: comparing a temperature (Temp) with at least one temperature threshold (ST=55&#xb0; C., ST=65&#xb0; C. and ST=70&#xb0; C.); and, deciding on limitations of the availability of functions of the unit when the (Temp) information reaches the temperature threshold (ST=55&#xb0; C., ST=65&#xb0; C. and ST=70&#xb0; C.).

The method of detecting the failure of the excitation circuit of a polyphase alternator controlled by a regulator comprises the following steps: a) electrical information (Iexc) is continuously taken from the excitation circuit (); b) the electrical information taken in step a) is continuously compared with a predetermined threshold value (Iref); c) a logic state (LT) is continuously determined according to the result of the comparison made in step b); and d) if the logic state (LT) determined in step c) persists for a time at least equal to a predetermined delay time (), an electrical continuity fault of said excitation circuit is signalled. This method is particularly suitable for machines having a rotor equipped with permanent magnets or having a high remanence of the magnetic circuit of the rotor.

Method and device for detecting failure of excitation circuit of polyphase alternator

The member for a synchronous rectifier bridge () typically includes at least first and second connection terminals (B+, P), at least one field-effect transistor () having source and drain electrodes () respectively connected to the first and second terminals (B+, P), and at least one comparator for comparing at least a first voltage source having a predetermined reference voltage and at least a first voltage difference between the voltages applied to the first and second terminals (B+, P) and having an output connected to a gate electrode () of the transistor (). The member () further includes at least one load pump () providing, from the applied voltages, at least one supply voltage (VH, VL), of an amplifier from said applied voltages.

Member for synchronous rectifier bridge, related synchronous rectifier bridge and use thereof

A micro-hybrid method and device for a motor vehicle. The device comprises, in an electrical cascade connection, a rotary electric machine, an AC-to-DC converter and a DC electrical supply bus, the DC electrical supply bus being connected to the AC-to-DC converter and being suitable for being connected to the terminals of an energy storage battery supplying an electrical distribution network of the vehicle. The device also comprises large capacity energy storage means which are mounted in parallel in relation to the cascade connection.

Micro-hybrid device for motor vehicle

The alternator comprises a wound rotor and a stator with a number of phases connected to a rectifier bridge equipped with switches () in the form of MOS type transistors, such as MOSFET type transistors, characterised in that the transistors () are voltage-rated to work by avalanche effect or linearly in the case of a load dump.

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Yerres, France

Philippe Masson