Method and apparatus for generating an air gap flux signal for an AC machine from AC line voltage and current values
US4245181A · kind A · utility
20Cited by
7References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 26, 1979 |
| Grant date | Jan 13, 1981 |
| Priority date | — |
| Expiry date | Feb 26, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/343
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A substantially smooth, continuous and sinusoidal air gap flux signal for an AC machine is provided from machine terminal voltages and line currents. A voltage representative of the machine stator voltage is combined with a voltage representative of the resistive voltage drop component across the stator to yield an intermediate voltage. This intermediate voltage is integrated and combined with a voltage representative of the stator flux leakage reactance to yield an air gap flux signal proportional to the difference between the integral of the intermediate voltage and the stator flux leakage reactance voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.