Method for determining a position of a rotor at standstill
US12081158B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 30, 2021 |
| Grant date | Sep 3, 2024 |
| Priority date | — |
| Expiry date | Dec 13, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P2203/03
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method for determining a position of a rotor of a brushless direct current (BLDC) motor at standstill. The method includes providing a plurality of current pulses to a plurality of windings of the BLDC motor while the rotor of the BLDC motor is at a standstill position. The method further includes measuring a plurality of times that it takes for the plurality of current pulses to reach a threshold for respective ones of the plurality of windings. A first position corresponding to a shortest time of the plurality of times is determined. A position detection value is determined based on the shortest time and based on times corresponding to positions that are adjacent to the first position. A position of the rotor at the standstill position is determined based on the position detection value and an interpolation function.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.