Sensor commuated electric motor with sensorless angular position determination and method
US9312798B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 11, 2011 |
| Grant date | Apr 12, 2016 |
| Priority date | — |
| Expiry date | Feb 11, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P6/12
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electric motor assembly, mud pulser and a method for transmitting data. The electric motor assembly includes an electric motor having a rotor and a stator that includes one or more windings; one or more sensors on the stator and configured to determine an angular position of the rotor; and a motor control circuitry configured to control a commutation of the electric motor based on signals received from the one or more sensors. The motor control circuitry is configured to determine a total angular rotation of the rotor based on a back emf voltage of the one or more windings and independent of the signals from the one or more sensors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.