Valeo Equipements Electriques Moteur

Stéphane Fourmy

Pierre Tisserand

Raymond Rechdan

Philippe Hazard

Sokha Ly

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 method for controlling the progressive charge of a motor vehicle alternator. The alternator comprises a stator, a rotor which is provided with an excitation coil, a voltage regulator which acts on an excitation current which is supplied to the excitation coil in order to regulate an output voltage of the alternator, and a device for controlling the progressive charge which, by means of limitation of the excitation current to a maximum value, determines a maximum mechanical torque which the alternator can collect on a thermal engine of the vehicle. The maximum mechanical torque is determined according to a speed of rotation (N) of the alternator, and the progressive charge control device comprises a so-called progressive charge return (PCR) signal which indicates the maximum value which the excitation current (lexc) can assume. When the excitation current assumes a stabilized value (G), the progressive charge return (PCR) signal is updated (H) so as to indicate a maximum current value of the excitation current which is equal to the stabilized value.

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Vitry sur Seine, France

Stéphane Fourmy