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AssigneeValeo Equipments Electriques Moteur
InventorsJean-Marie Pierret, Christian Ducrot
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In a method for regulating the excitation current of an inductor of a motor vehicle alternator, the alternator is of the kind comprising a rectifier bridge supplying a rectified voltage (which is to be regulated) having a low frequency fluctuation of variable amplitude with a high frequency waveform of constant amplitude superimposed on it, the rectified voltage Ub+ being thus a periodic voltage, each cycle of which comprises a first alternate period, during the course of which a voltage is applied to the inductor of the alternator, and a second alternate period, during which no voltage is applied to the inductor. The method comprises the steps of initiating measurement of the rectified voltage during an intermediate part of one of the two alternate periods; evaluating the measurement, over a predetermined time sampling break, by sampling, that is to say by carrying out successive iterative measurements; comparing the measured value of the rectified voltage with a calculated theoretical value thereof; and deducing from that comparison the durations of the alternate periods for the next following cycle.
A method of regulating an excitation current of an inductor of a motor vehicle alternator, said alternator comprising a rectifier bridge delivering a rectified voltage to be regulated, said rectified voltage having a low frequency waveform of variable amplitude on which a high frequency waveform of constant amplitude is superimposed, said rectified voltage being thus a cyclic voltage, each cycle of which comprises a first alternate period having a duration T1, in the course of which a voltage is applied to the inductor of the alternator, and a second alternate period having a duration T2, in the course of which no voltage is applied to the inductor, wherein said method comprises the steps of:
A method according to any one of the preceding claims, wherein the sampling measurement of the rectified voltage is carried out by means of a digital filter.
A method of regulating a motor vehicle alternator having circuitry for delivering a rectified voltage to be regulated to an inductor, said rectified voltage having cycles, each cycle having a first alternate period having a duration T.sub.1 during which a voltage is applied to the inductor and a second alternate period having a duration T.sub.2 during which no voltage is applied to the inductor, the method comprising the steps of:
Dependencies are inferred from the claim text.