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Method and device for monitoring the wear of sliding electrical contacts of a rotating commutator for an automotive vehicle

A technology of triboelectric contact and current commutator, which is applied in the direction of rotary collector, electronic commutation motor control, control purpose model/simulation, etc. It can solve wear and tear, loss of electrical contact, stop of vehicle network power supply, etc. question

Active Publication Date: 2013-03-27
PEZHO SITROEN AUTOMOBILS SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the friction of the brushes along the trajectory leads to wear and thus a significant loss of electrical contacts within the rotor windings
The wear of the brushes tends to disable the motor in current-generating mode, resulting in damage to the current commutator and the failure to recharge the energy storage, stopping the power supply to the on-board network and even stopping the motor as a source of mechanical energy

Method used

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  • Method and device for monitoring the wear of sliding electrical contacts of a rotating commutator for an automotive vehicle

Examples

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Embodiment Construction

[0024] In the only figure, a generator electric machine 1 is mounted on a motor vehicle for supplying equipment 2 of this vehicle, in particular a rechargeable energy store and via an on-board vehicle associated with the electric machine and / or the rechargeable energy store Mains powered accessories. The electric machine 1 is equipped with a rotating current commutator 3 comprising triboelectric contacts 4 (eg brushes etc.) cooperating with corresponding traces 5 in order to electrically connect the rotor 6 to the power supply of the equipment 2 of the vehicle Loop 26. In order to prevent the significant wear of the triboelectric contact 4 from adversely affecting the equipment of the vehicle, the motor 1, especially the rotating current commutator 3, and the monitoring device for monitoring the wear of the triboelectric contact 4 by analyzing the current generated by the motor 1 8 related.

[0025] More particularly, information about the current generated by the motor 1 is...

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Abstract

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).

Description

[0001] This application claims priority from French patent application 1056011 filed on July 22, 2010, the entire content of which (text, drawings and claims) is hereby incorporated by reference. technical field [0002] The field of the invention is that of rotary current commutators using triboelectric contacts, which are equipped on current generating devices, in particular for motor vehicles. The invention more particularly relates to a method and a device for monitoring the wear of triboelectric contacts, such as brushes or similar components cooperating with conductive traces, associated with such current commutators. Background technique [0003] Motor vehicles are equipped with rotating electrical machines, such as alternators or reversible alternators, in combination with a rotor rotatably fitted inside a stator. Such electric machines are used in particular when starting the internal combustion engine to supply energy to the on-board electrical system and / or to cha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P6/00H01R39/58
CPCH01R39/58H02P6/001H02P6/34
Inventor S·阿马特M·贝塞加尔
Owner PEZHO SITROEN AUTOMOBILS SA
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