System and method to determine electric motor efficiency using an equivalent circuit
US7956637B2 · kind B2 · utility
17Cited by
5References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 3, 2008 |
| Grant date | Jun 7, 2011 |
| Priority date | — |
| Expiry date | Nov 6, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P23/14
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A system and method for determining electric motor efficiency includes a monitoring system having a processor programmed to determine efficiency of an electric motor under load while the electric motor is online. The determination of motor efficiency is independent of a rotor speed measurement. Further, the efficiency is based on a determination of stator winding resistance, an input voltage, and an input current. The determination of the stator winding resistance occurs while the electric motor under load is online.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.