Valeo Equipements Electriques Moteur

Valeo Equipments Electriques Moteur

Pierre Tisserand

Pierre Chassard

Laurent Labiste

Laurent De Lamarre

Vincent Gendron

Thibault Arrou

Brice Lecole

Christophe Dugue

Gregory Godefroy

Pierre Sardat

Pierre Faverolle

Jean-Marc Dubus

Régis Seidenbinder

Guillaume Duthilleul

Olivier Grammont

Benoit Walme

Romuald Morvany

Jean-Francois Gautru

Stéphane Fourmy

Alexandre Schmitt

Karine Stofleth

Giuseppe Pasetti

Pierre-François Ragaine

Philippe Hazard

Sokha Ly

Jean-Guillame Aubin

Sebastien Moreau

Christophe Porte

Khalid Sassane

Jeremy Lagrange

Thomas Vera

Nathalie Canitrot

Geoffrey Massemin

Francesco Tinfena

Fabrice Sangiovanni

Grégory Godefroy

Sébastien Moreau

Benoît Walme

Guillaume Tramet

Claire Serdin

Jean-François Gautru

The method of control according to the invention slaves a DC voltage generated by the alternator to a predetermined setpoint value by controlling an excitation current flowing in an excitation circuit comprising an excitation winding of a rotor of the alternator. The excitation current is controlled by means of a semiconductor switch, in turn controlled by a control signal having a predetermined period. The method comprises a detection of a failure of the excitation circuit. At least one short-circuit of the excitation winding is detected. According to another characteristic of the method, the control signal is generated on the basis of a combination of a setpoint signal formed by pulses of the predetermined period exhibiting a duty ratio representative of the setpoint value and of a detection signal indicative of the short-circuit.

Method for controlling regulating device for regulating automotive vehicle alternator, corresponding regulating device and alternator

A regulator has a circuit generating an activation command by bringing, to a first voltage higher than a high reference voltage, a bidirectional line connected to a detection circuit for detecting a status of the activation command. The detection circuit comprises generation means for generating a fault signal from a flag indicating a failure of the alternator, linking the line to a ground by means of a switching element, thus bringing the line to a second voltage lower than a fault voltage lower than the high reference voltage, and the control circuit comprises detection means for detecting the fault signal. The control circuit further transmits a setpoint PWM signal having a maximum higher than the high reference voltage and a minimum lower than a low reference voltage higher than the fault voltage, a duty ratio of the setpoint signal being representative of a setpoint voltage (V) of the regulator.

Device for controlling a regulator of a motor vehicle alternator, and alternator comprising the corresponding regulator

A regulating loop for a digital regulator of an excitation rotating electric machine for operation as a generator delivering an output voltage tailored by an excitation current. The digital regulator comprises a control device for controlling the excitation current and the regulating loop comprises, at input, a measuring device for measurement by sampling the output voltage generating a measurement signal (Um), an calculation device generating an error signal (e) equal to a difference between the measurement signal (Um) and a setpoint (U), a processing system for processing of the error signal (e) generating a regulating signal (Ysat) comprising in parallel a first amplifier, an integrator and an anti-saturation system, and comprising, at output, a generation system for generation of a control signal (PWM) controlling the control device as a function of the regulating signal (Ysat). The anti-saturation system is a conditional detection system.

Proportional integral regulating loop for digital regulator device for motor vehicle excitation rotary electrical machine

The invention relates to a voltage regulator () for a motor vehicle alternator (). The device comprises a control module (I) for controlling an excitation current (lexc) in an excitation winding () of the alternator () according to a difference () between a setpoint voltage (DO) and a control voltage (Dbat) of an on-board network (). The on-board network () of the vehicle is powered by a battery () to which the alternator () is connected. According to the invention, the voltage regulator () further comprises a safety module () that monitors the control voltage (Ubat) and which is separate from the control module (I). In a particular embodiment, the control module (I) and the safety module () are connected electrically by external bonding interconnections.

Voltage regulator of a motor vehicle alternator, regulator brush-holder, and corresponding alternators

System () for managing a supply voltage (B+A) of an onboard electrical network of a motor vehicle comprises a device () for regulating the supply voltage and a device () for protecting the onboard electrical network against overvoltages, the two devices together controlling an excitation of an alternator supplying the onboard electrical network. According to the invention, the protection device is separate from the regulating device. An overvoltage signal (OVD) generated by the protection device () and controlling the excitation has priority over an excitation signal (EXC) generated by the regulating device. The regulating device and the protection device can be in the form of two separate electronic blocks on separate substrates.

System for controlling supply voltage of on-board electrical network of motor vehicle

The invention relates to a control loop () which is installed in a voltage regulator of a motor vehicle alternator and controls an output voltage of the latter by adjusting an excitation current of the alternator. The control loop includes, at the input, means for measuring () the output voltage by sampling, generating a measurement signal (Um), error-calculation means () generating an error signal (e) equal to a difference between the measurement signal (Um) and a set value (Uo), means for processing the error signal (e) including an amplifier () and generating a control signal (Ysat) and, at the output, means () for generating a control signal (PWM) controlling excitation control means in accordance with the control signal (Ysat). According to the invention, the processing means also include a phase-advance filter ().

Control loop of a digital control device of a rotary electrical machine with excitation for a motor vehicle

The invention relates to a device for controlling an alternator of the type that controls a DC voltage (B+A) generated by the alternator () according to a predetermined set voltage (U) by monitoring the intensity of an energizing current (I) flowing through an energizing circuit of the alternator. According to the invention, the device includes a voltage-control loop () and a temperature-control loop () which comprises a temperature sensor supplying a current temperature (T) of components of the alternator, a subtracter () supplying a temperature error (&#x3f5;) between the current temperature (T) and a maximum acceptable temperature (T) and a control module () supplying a maximum admissible energizing percentage (r) in accordance with the temperature error according to a predetermined control law.

Device for controlling a motor vehicle alternator, and corresponding alternator

The excitation circuit according to the invention controls an excitation current (lexc) in an excitation winding () of an alternator by means of an on-board network voltage control loop (Vbat+,) of the vehicle, and comprises a first MOS power transistor () which is connected between a first positive supply terminal Vbat+ (), and a first excitation terminal (), and is controlled by the control loop by means of a first control circuit (), a second MOS power transistor (), which is connected between the first excitation terminal and a second excitation terminal () which is connected to a ground terminal () and acts as a free wheel diode, whilst being controlled by means of a second control circuit (). According to the invention, the circuit additionally comprises a control loop () of a drain-source voltage (Vds) of the second transistor.

Excitation circuit of a motor vehicle alternator, voltage regulator, and alternator which incorporates it

A voltage regulator device for a rotary electrical machine, notably an alternator and/or alternator-starter of a motor vehicle. The regulator device () comprises one or more electronic components () able to contribute to controlling the electric machine, a heat sink () having parallel heat-dissipating vanes (). The heat sink is in a heat-exchange relationship with the component or components, and a support () on which the heat sink is positioned. The support is able to be mounted on the electric machine in such a way that the vanes of the heat sink can orient an air flow towards a region of depression provided between the support and the machine. A bearing of an electric machine is equipped with such a device and to an electric machine equipped with such a bearing.

Voltage regulator device for rotary electric machine, bearing for rotary electric machine equipped with such device and machine comprising such bearing

A method for controlling an alternator or alternator-starter of a motor vehicle, the electric machine being capable of providing an electric current, the strength of which varies on the basis of the excitation signal (EXC). A duty cycle is associated with each excitation signal. The method includes comparing the difference between the duty cycle values of two consecutive excitation signals at a predetermined threshold. If the difference is greater than the predetermined threshold, a gradual response phase is released, during which the duty cycle of the excitation signals is gradually increased, particularly in a substantially linear manner. At the start of the gradual response phase, the duty cycle of the consecutive excitation signals is increased by a predetermined jump (D,B), then the duty cycle is gradually increased. The duty cycle jump at the start of the gradual response phase being less than or equal to the release threshold of the gradual response phase.

Two-phase duty cycle control for motor vehicle alternator combining stepwise and progressive response for preventing engine stall

An electrical machine such as an alternator or starter-alternator for a motor vehicle which is fitted with the one-piece voltage-regulator/brush-holder assembly (). The brush-holder () is capable of guiding at least first and second brushes by means of respective first and second longitudinal recesses (). The recesses are substantially parallelepiped, made of an electrically insulating material and extend substantially in an axial plane of a rotor of the machine. Each recess is provided with at least one respective longitudinal internal groove () in communication with at least one channel () provided in a body () of the assembly (), in an axial direction (XX') of the rotor, and intended for a coolant () to pass therethrough. A first cross section of the first internal groove is between 5% and 7% of a second cross section of the recesses.

One-piece voltage regulator/brush-holder assembly for a rotary electrical machine and rotary electrical machine including such an assembly

A method for controlling a motor vehicle alternator, in which an error value, resulting from the comparison between the voltage produced by the alternator and a set value, is processed in a filtering means by applying a transfer function, which determines a gain to be associated with the error value on the basis of the rotational frequency of the alternator, in order to control the adjustment of the field current allowed by the alternator. The transfer function of the filtering means is modified on the basis of the rotational speed of the alternator by attenuating the gain over a given frequency range when the rotational speed decreases.

Method and system for controlling a motor vehicle alternator, and motor vehicle alternator including such a system

A method is disclosed to produce a supply voltage (B+) in an on-board system of a vehicle in response to an excitation current (I_ROTOR) applied to a rotor of the alternator. The method is of the type that consists in: limiting the resisting torque by determining a maximum cyclic ratio (DC_C_LIMIT) of the excitation current as a function of variables taken from a group containing a rotational speed (V_ROTOR) of the rotor, a temperature of the rotor, the excitation current and the supply voltage (B+). The maximum cyclic ratio is determined as a function of at least two of the variables in the group. According to one specific embodiment, the variables are rotational speed and temperature. According to another embodiment, the variables are rotational speed and excitation current.

Method for controlling the resisting torque of a motor vehicle alternator, and system for implementing this method

The rotary electrical machine is capable of functioning as a generator and outputs a continuous output voltage (Ub+) that is adjustable by an excitation current. The digital regulator () of the machine comprises an excitation current control means () and a control loop () that includes a device () for measurement, by sampling, of the output voltage (Ub+), the measurement device generating a signal sampled at a predetermined first sampling frequency (F). The machine has a bandwidth that is limited by a predetermined first cutoff frequency (F). The measurement device includes an apparatus for oversampling such that the first sampling frequency (F) is greater than twice the first cutoff frequency (F), and the control loop also includes an apparatus () for decimating the sampled signal.

Rotary electrical machine with excitation provided with a digital regulator device

The regulator/brush-holder assembly () comprises a support () and an electrical circuit () comprising a regulating element () connected by microwires to a trace circuit (). The electrical circuit further includes a filtering circuit () separate from the regulating element and connected by microwires to the trace circuit. According to one particular embodiment, the filtering circuit comprises an insulating substrate () and surface-mounted components (C, C, S, S, V). A ground plane () and/or one or more ground pads may be provided for connection to a ground trace of the trace circuit. The filtration frequencies of the filter circuit extend from 100 kHz to 1 GHz.

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Limeil-Brevannes, France

Pierre Tisserand