Method for determining the short-circuit inductance of an asynchronous machine
US5477162A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 24, 1994 |
| Grant date | Dec 19, 1995 |
| Priority date | — |
| Expiry date | Aug 24, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/343
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of determining a short-circuit inductance in an asynchronous machine even during operation of the machine includes the steps of causing a step change in the stator voltage (u.sub.s); measuring both the stator voltage (u.sub.s) and the stator current derivative (i'.sub.s) both before and after the step change in the stator voltage; determining the difference between the measured stator voltages (u.sub.s (t.sub.1), u.sub.s (t.sub.2)) and the difference between the measured stator current derivatives (i'.sub.s (t.sub.1), i'.sub.s (t.sub.2)); and determining the quotient of the difference between the stator voltages and the difference between the stator current derivatives for obtaining a short-circuit inductance (.sigma.L.sub.s).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.