Valeo Equipements Electriques Moteur

Valeo Equipments Electriques Moteur

Michaël Chemin

Philippe Masson

Pierre Sardat

Jean-Claude Matt

Marc Ranier

Bruno Dessirier

Frédéric Leroux

Benoit Soucaze-Guillous

Thierry Mandion

Serge Newiadomy

Roger Abadia

Philippe Baudesson

Marc Tunzini

Jean-Marc Dubus

François-Xavier Bernard

Raymond Rechdan

Fabien Guerin

Patrick Rondier

Gilbert Konan

Julien Quincerot

Karine Stofleth

Ludovic Bodin

Arnaud Devries

Cédric Leboeuf

Yann Lecocq

Raphaël Filipe

Laurent Caves

Guido Chiappori

Philippe Le Moigne

A method for controlling a multi-phase rotary electric machine is disclosed. The stator of the machine is controlled by a control bridge having a plurality of parallel mounted switching arms, with each arm comprising a high-side switch and a low-side switch connected at a center tap connected to a phase of said rotary electric machine. The machine operates as a generator and is connected to an electrical network on board a motor vehicle. The method involves short-circuiting a phase winding of the stator when a measurement of the voltage of said network exceeds a first predetermined value, and after this, activating a switching arm, the center tap of which is connected to said at least one short-circuited phase winding, during which the intensity in the short-circuited winding is measured, if the measured intensity is positive, the high-side switch of said activated switching arm is moved to the closed position, otherwise, it is moved to the open position.

Method for controlling an electric rotary machine operating as a generator and corresponding control system for reducing the voltage in the network in the event of a cutoff

Device (DMT) arranged to provide an additional voltage, when the heat engine starts up, for the electrical power supply of the rotating electrical machine (AD). This additional voltage is added to a rated voltage of the on-board electrical system (RB) provided by a battery (BAT). The device comprises a second voltage source (Ucap) and electronic switches (K, K), each comprising at least one MOSFET transistor. At least one MOSFET transistor (K) of the switches, mounted in series with the second voltage source, is controlled in linear mode at the end of the startup of the heat engine. Advantageously, the device comprises current control loops for controlling the transistors in linear mode.

Device for maintaining voltage during startup for a motor vehicle

An electricity supply system having double power-storage devices which is suitable for implementation in an electric or hybrid motor vehicle. The supply system is intended for being connected to a power network of the vehicle. The supply system is of the type that includes a first power-storage device, having a first specific energy, a first specific power and a first operating voltage (Ue), and a second power-storage device, having a second specific energy that is lower than the first specific energy, a second specific power that is higher than the first specific power and a second operating voltage (Up) that is higher than the first operating voltage (Ue). The first and second power-storage devices are electrically coupled by a bidirectional DC-DC converter controlled in accordance with the operating states of the vehicle. The DC-DC converter includes a floating capacitor connected in series between the first and second power-storage devices.

Electricity supply system having double power-storage devices of a hybrid or electric motor vehicle

A method performed in a power bridge () comprising multiple arms (B1, B2, Bi, Bn). Each arm comprises upper and lower semiconductor switches arranged in series and connected in parallel to first and second terminals (B+, B&#x2212;) of a common voltage source (). The mid-point of the arm is connected to a phase of an electrical load (). The aforementioned switches are controlled complementarily by pulses having a duty factor set value (RC1, RC2, RCi, RCn) determined as a function of a first phase voltage set value (V1, V2, Vi, Vn) in relation to a reference terminal of the electrical load () and of a common-mode voltage (V0) in relation to one of the first or second terminals, such as to control the switching losses of the switches. The common-mode voltage (V0) is determined such as to balance switching losses and conduction losses between the switches.

Method for controlling a power bridge, and corresponding control device, power bridge and rotary electric machine 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 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.).

A starter device () for a combustion engine (), particularly of a motor vehicle. The device includes a rotary electrical machine () comprising a drive member () and a tensioner. A belt () collaborates with the drive member of the rotary electrical machine and with the combustion engine in order that the latter can be started using the belt rotationally driven by the electrical machine in a first direction (A). A tensioner () presses against a length () of the belt that runs between the electrical machine and the combustion engine. As the rotary electrical machine rotates in a second direction (B) the opposite of the first, it is possible for the tensioner to be brought from a stopped position into a position for beginning to start the combustion engine. The movement from the stopped position to the position for beginning to start being accompanied by a lengthening of said length of belt and/or by an increase in the tension in this length of belt.

Starter device for combustion engine, particularly of motor vehicle

An electrical supply device includes a set of armature coils which are coupled together in a polygonal mode. The coils are connected to a single bridge rectifier which includes a set of controllable elements allowing switching between a first operating mode in which some of the coils are electrically connected in series and a second operating mode in which all of the coils are electrically connected in parallel. An alternator for a motor vehicle includes the disclosed supply device.

Power supply device for motor vehicle alternator and alternator employing such device

A rotating electrical machine including a first member () capable of generating a magnetic field which rotates relative to the first member, and a second member () which is provided with a winding through which a current can flow, such that the rotating magnetic field drives the second member in rotation. An electrical value which is at least related to the current is measured () and the generation of the rotating magnetic field is started () at a time which is determined as a function of the electrical value which is measured. A method of controlling the machine is also disclosed.

Rotating electrical machine and method of controlling the same

According to the disclosure, a power sub-assembly () for a micro-hybrid system () in an automobile includes an AC-DC converter () with a transistor bridge (), an energy storage device () and a power bus () including at least two cylindrical conductors ('). According to the disclosure, conductors (&#x2032;) include respective coaxial cylindrical surfaces (&#x2032;). The power bus integrated in the power subassembly allows for a parasitic inductance that is by far lower than that of the standard cables in power subassemblies of the prior art, particularly in order to avoid overvoltage at the terminals of the transistors in the AC-DC converter.

Power subassembly for micro-hybrid system in an automobile

A method for controlling a rotary electrical machine and a control and power module for a rotary electrical machine. The rotary electrical machine includes a plurality of phase windings (), a power circuit () which comprises a plurality of arms each formed by a bridge of switches and which is capable of supplying an electrical network at an output voltage (Vres) equal to a nominal voltage when the bridge of switches is in a nominal mode of operation, an excitation winding () through which flows an excitation current (I exc) which generates a magnetic flux in a magnetic excitation circuit (), and an electronic control circuit () which operates the power circuit and controls the excitation current. The method includes locking the bridge in at least one arm of the power circuit in a conductive state when the output voltage exceeds a voltage threshold higher than the nominal voltage. The nominal mode of operation of the bridge is returned to independently of the output voltage.

Method for controlling a rotary electric machine in case of load shedding and corresponding power control module

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

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

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.

Growing community of inventors

Festigny, France

Michaël Chemin