Method of determining a position of a rotor of a brushless permanent magnet motor
US12316265B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 22, 2021 |
| Grant date | May 27, 2025 |
| Priority date | — |
| Expiry date | Jan 27, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P2207/05
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method of determining a position of a rotor of a brushless permanent magnet motor includes measuring a current value indicative of current flowing through a phase winding of the motor and providing a reference voltage value indicative of a voltage applied to the phase winding of the motor. The method includes calculating a phase of back EMF induced in the phase winding using the measured current value and the reference voltage value, and determining a zero-crossing point of the back EMF induced in the phase winding using the calculated phase of back EMF induced in the phase winding. The method includes generating a rotor position signal based on the determined zero-crossing point.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.