METHOD FOR DETECTING A FAILURE IN A THREE-PHASE ALTERNATOR, DEVICE FOR DETECTING FAILURES AND ASSOCIATED COMPUTER PROGRAMME

摘要

The invention concerns a method for detecting a failure in a three-phase alternator connected to a three-phase rectifier bridge. The method comprises the following steps:—rectifying (70) the voltages generated by the three-phase alternator;—adding (76) the rectified voltages taken at the first and second phases in order to obtain a voltage sum;—subtracting (78), from said voltage sum, twice the rectified voltage taken at the third phase, in order to obtain a voltage difference;—comparing (80) the voltage difference to a high threshold and a low threshold;—detecting (82) a failure when the voltage difference is less than said low threshold or when the voltage difference is greater than said mot threshold. The invention also concerns a device for detecting failures and an associated computer programme.

主权项

1. A method for detecting a failure of a three-phase alternator connected to a three-phase rectifier bridge; said method comprising the steps of:
rectifying the voltages generated by the three-phase alternator in a first phase, a second phase, and a third phase; adding the rectified voltage sampled from the first phase, to the rectified voltage sampled from the second phase, in order to obtain a voltage sum; subtracting, from said voltage sum, twice the rectified voltage sampled from the third phase, in order to obtain a voltage difference; comparing the voltage difference to a high threshold and to a low threshold; and detecting a failure when the voltage difference is less than said low threshold or when the voltage difference is greater than said high threshold.