Method for processing data pertaining to an activity of partial electrical discharges
US8234085B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 25, 2008 |
| Grant date | Jul 31, 2012 |
| Priority date | — |
| Expiry date | Nov 26, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/346
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for measuring and processing data pertaining to an activity of partial electrical discharges taking place in a three-phase electric machine (1) powered with square wave voltage, said data comprising a plurality of discharge signals and a plurality of sets of three values (eu, ev, ew) of power supply voltage of the machine measured in concurrence with a corresponding discharge signal, comprises the following steps: —transforming each set (eu, ev, ew) of three voltage values measured into a corresponding pair (ed, eq) of voltage values; —deriving a phase angle value from each of said pairs (ed, eq) of voltage values; —attributing to each discharge signal the corresponding phase value, to assess the measured discharge signals as a function of corresponding phase values. Prior art techniques for processing data pertaining to activity of partial electrical discharges taking place in three phase electric machines powered with square wave voltage provide for assessing the measured discharged signals as a time sequence of events, with no possibility to place them effectively in relation to the power supply voltages, this entailing that any subsequent statistical processing of the …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.