Valeo Equipements Electriques Moteur

Valeo Equipments Electriques Moteur

Valeo Systemes De Controle Moteur

Raymond Rechdan

Jean-Marie Pierret

Michaël Chemin

Christophe Louise

Thierry Cheng

Cyrille Corniglion

Stéphane Fourmy

Sylvain Delion

Bryan Planchard

Sylvain Decoster

The invention relates to an electrical network () for a vehicle, comprising: a first circuit () comprising a first power source () and at least one first electronic component () powered by the first power source (); and a second circuit () comprising a second power source () and at least one second electronic component () which can be activated and is powered by the second power source (). The network () also comprises: a connecting member () between the first () and second () circuits, said connecting member () allowing, in a first configuration, an exchange of current of a first value between the first circuit () and the second circuit () and, in a second configuration, an exchange of current of a second value between the first circuit () and the second circuit (), in which the second value is lower than the first value; and a control unit () which controls the configuration of the connecting member ().

Electrical network for a vehicle, having at least one component that can be activated

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

A rotary electrical machine regulation device of the type which can control the electrical machine using a predetermined set value of a direct voltage (B+) of the on-board electrical network of the vehicle in which the machine is installed. An excitation current (EXC) is supplied to the alternator (machine), and has a duty cycle (RC) which is determined by a digital processing block (), on the basis of an error voltage between the predetermined set value and the direct voltage of the electrical network. Accordingly, a system () is provided herein for making the digital block electrically self-sufficient. The system includes a voltage maintenance device with a self-sufficient capacitor (), and a self-sufficient control element ().

Method and device for regulation of a rotary electrical machine for a motor vehicle

A device for regulating the voltage at which an automobile battery is charged by an alternator, having a control circuit and a power circuit, as well as an external management unit connected to the control circuit in order to transmit different regulation parameters to it, the power circuit also being connected to the external management unit and including means enabling it to generate by itself an excitation signal when the management unit delivers a control signal, the control circuit being activated to emit an excitation signal only when it detects the start of rotation of the alternator.

Device for regulating the voltage at which an automobile battery is charged by an alternator

A system and method are provided to manage the excitation of an automobile alternator through the use of its regulator which delivers to the inductor of the alternator a pulse width modulation excitation signal. The regulator receives, from an external management unit, a pulse width modulation excitation control signal with a frequency less than that of the excitation signal. The regulator delivers an excitation signal with a pre-programmed cycle ratio for a sufficient duration to enable the regulator to determine the control information carried by the control signal from the management unit. The regulator continues the excitation signal with the pre-programmed cycle ratio until receipt of instruction from the management unit to regulate the battery voltage.

Method for managing the excitation of an automobile alternator by means

Method for regulating the excitation current in a motor vehicle

A regulator circuit for regulating the voltage delivered by an alternator for charging an associated battery, the alternator including an excitation winding and the regulator circuit controlling the current flowing through said excitation winding by switching between a first state in which excitation current increases and a second state in which excitation current decreases, said current being controlled as a function of a voltage value delivered by said alternator, wherein the circuit comprises:

Regulator circuit for regulating the output voltage of an alternator, in

A regulator circuit for the voltage for charging a battery by an alternator comprises in succession: processing and comparison means (A4, A1, A2) receiving a fraction of an alternator voltage (D+) and generating a monotonic variation of the mean voltage regulated as a function of the load on the alternator,

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Villecresnes, France

Raymond Rechdan