Monitoring of the wear of sliding electrical contacts and its application to the state-dependent and/or predictive maintenance of a device having sliding electrical contacts
US6034531A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 14, 1997 |
| Grant date | Mar 7, 2000 |
| Priority date | — |
| Expiry date | Jul 14, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H1/0015
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The method of monitoring the wear of at least one sliding electrical contact of a brush, sliding over a track which can move with respect to the brush, comprises the measurement of the electrical resistance of this contact, the delivery of an image signal corresponding to this resistance, the following of its variations, the construction of a reference signal indicative of a state of wear of the contact, the comparison of the image signal with the reference signal and the derivation of a signal, resulting from this comparison, corresponding to the state of wear of the contact. The resistance is measured by the ratio of the variations in the voltage across the terminals of the contact to the variations in the current flowing through this contact.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.