Device and method for monitoring and/or analyzing rotors of electric machines in operation
US8536839B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 18, 2011 |
| Grant date | Sep 17, 2013 |
| Priority date | — |
| Expiry date | Apr 18, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P29/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method is provided for monitoring and/or analysis of electrical machines during operation. An electrical machine has at least one generator with a shaft, an exciter system and drive device that drives the shaft. In this case, a first signal, which describes a voltage across a rotor winding, and a second signal, which describes a current flowing through the rotor winding, are measured simultaneously. The two signals are supplied to an analysis unit. The signals are split into individual frequency components in the analysis unit. The impedance of the rotor winding is then determined in order to identify fault states in the electrical machine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.