Commutated electric drive and method for controlling a commutated electric motor
US8901862B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 9, 2010 |
| Grant date | Dec 2, 2014 |
| Priority date | — |
| Expiry date | Jun 21, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P6/18
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A commutated electric drive has an electric motor having a sensor assembly which has a permanent magnet on a shaft of the electric motor and an analog Hall sensor situated stationary relative to the stator of the electric motor opposite to the permanent magnet. A controller for controlling the windings of the electric motor has a memory for storing a calibration Hall signal of the magnetic field of the permanent magnet, measured using the Hall sensor, over one revolution of the shaft. The controller has a device for comparing the calibration Hall signal with an instantaneous Hall signal of the instantaneous magnetic field of the permanent magnet, measured using the Hall sensor. Temperature effects and aging effects may be recognized and taken into account when determining the rotor position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.