Device and method for determining the rotational position of a rotor in an electric machine
US8222847B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Dec 9, 2006 |
| Grant date | Jul 17, 2012 |
| Priority date | — |
| Expiry date | Aug 9, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P6/185
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The invention relates to a device and a method for determining the rotational position of the rotor of an electric machine that has star-connected pole winding phases. The device is equipped with a unit for applying voltage pulses (14-16) to at least one of the phases (1-3) and a unit that evaluates the neutral point potentials generated by the voltage pulses (14-16). The invention is characterized by the provision of the aforementioned unit for applying time-delayed voltage pulses (14-16) to different phases (1-3) and the unit for producing at least one differential between the neutral point potentials generated by said voltage pulses.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.