System and method for starting and operating a motor
US7592761B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 29, 2005 |
| Grant date | Sep 22, 2009 |
| Priority date | — |
| Expiry date | Nov 15, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P2209/07
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method for determining an initial position of a rotor of a polyphase motor is described. The method comprises determining current change values from a plurality of phases of the motor during saturation of the motor relating to the initial position of the rotor; identifying a set of modelled current change values according to a modelled behaviour of the motor, in which the modelled current change values represents modelled positions of the rotor under the modelled behaviour; and comparing the current change values to the set of modelled current change values to identify the initial rotor position from the modelled positions. A system implementing the method is also described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.