Valeo Equipements Electriques Moteur

Sciosense B.v.

Giuseppe Pasetti

Syed Zeeshan Ali

Pierre Tisserand

Pierre Chassard

Alberto Maccioni

Monica Schipani

Luigi Di Piro

Thibault Arrou

Clinton Sean Dixon

Alexandre Schmitt

Francesco Tinfena

In an embodiment an electro-thermal device includes a heater, a readout circuit, a digital controller having a first input coupled to a first output of the readout circuit and a digital sigma-delta modulator having a first input coupled to an output of the digital controller and an output coupled to the heater.

Electro-thermal based device and method for operating a heater

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

Growing community of inventors

Pisa, Italy

Giuseppe Pasetti