METHOD AND DEVICE FOR MONITORING THE WEAR OF SLIDING ELECTRICAL CONTACTS OF A ROTATING COMMUTATOR FOR AN AUTOMOTIVE VEHICLE

摘要

The subject of the invention is a method and a device for monitoring wear of the sliding electrical contacts (4) of a rotating commutator (3) of an electrical machine (1) that generates current for an automotive vehicle. The method consists in detecting (15), using the electrical machine (1) in the current generation phase, data relating to the opening duty cycle (ODC) induced by the generated current. The data relating to the detected ODC are compared (15) with a predefined ODC set-point, and the state of wear of the sliding electrical contacts (4) is deduced with respect to a tolerated wear threshold by incrementing a regulated counter (18) using said comparison (15). A warning is generated (23) when the state of wear of the sliding electrical contacts (4) reaches said tolerated wear threshold. This warning being suppressed (24, 25) upon detecting a value that tends to zero the regulated counter (18), after replacement of the sliding electrical contacts (4).