Method of operating an induction motor
US5388052A · kind A · utility
12Cited by
9References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 31, 1993 |
| Grant date | Feb 7, 1995 |
| Priority date | — |
| Expiry date | Mar 31, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P2207/01
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
All N parameters of an induction machine equivalent circuit may be determined by providing a stator voltage such that the induction machine produces no torque, measuring a stator current for at least N-1 frequencies, determining the tangent of the angle .phi. between the stator voltage and stator current at said frequencies, and solving N-1 equations R(.omega.)tan.phi.+X(.omega.)=0, given one of the parameters, said frequency values and said associated values for tangent .phi., where R(.omega.) and X(.omega.) are the real and imaginary components of the complex stator impedance of the induction machine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.