Hall-effect sensor signal offset correction in phase commutation
US10749454B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 21, 2017 |
| Grant date | Aug 18, 2020 |
| Priority date | — |
| Expiry date | Dec 21, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P6/157
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method of operating a final drive unit clutch. The method provides an electric motor coupled with a clutch. The electric motor including a stator, a first Hall-effect sensor coupled with the stator, a second Hall-effect sensor coupled with the stator, a third Hall-effect sensor coupled with the stator, and a rotor having at least one magnetic pole pair. The method also provides for a controller in electrical communication with the electric motor. The method includes determining a first ideal commutation point, and calculating a first offset of a first Hall-effect sensor state change from the first ideal commutation point. The method further includes calculating a time delay of commutation, during the clutch transition between a non-torque transmitting position and a torque transmitting position, utilizing the first offset such that a second Hall-effect sensor state change corresponds with a second ideal commutation point.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.