Method and apparatus for estimating a rotation speed of an electric motor
US8405344B2 · kind B2 · utility
1Cited by
7References
24Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 12, 2009 |
| Grant date | Mar 26, 2013 |
| Priority date | — |
| Expiry date | Dec 20, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P6/182
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method is disclosed for estimating a rotation speed of an electric motor supplied by an inverter, by determining a time derivative of a stator current vector of the electric motor during a zero vector state of the inverter; and determining an estimate of the rotation speed of the electric motor on the basis of the determined time derivative of the stator current vector.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.