Method for regulating the excitation current in a motor vehicle alternator by digital processing, and a regulating device for carrying out the method

摘要

The method of regulation includes: starting to measure the rectified voltage at the output of the alternator during each period T of this voltage, performing this measurement by sampling over a predetermined period Te, comparing this measured value of the rectified voltage with a calculated reference value, and deducing from this comparison the duration of the first phase T1 for the next following period T, this first phase being the one in which the battery voltage of the vehicle is applied to the alternator rotor winding. The sampling measurement of period Te ends, in each period T, at an instant T- epsilon , where epsilon is a period of time which is very short by comparison with the length of the period T.