Sensorless position determination of an electric machine
US11705835B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 19, 2021 |
| Grant date | Jul 18, 2023 |
| Priority date | — |
| Expiry date | Oct 19, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P25/092
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Systems and methods for position determination in an electric machine are provided. Aspects include a DC power source connected to an inverter circuit, an electric motor comprising a rotor and a stator, wherein an output of the inverter circuit is connected to a plurality phase of windings, and a controller configured to operate the electric motor and the inverter circuit, wherein the controller is further configured to determine one or more inactive phase windings from the plurality of phase windings, supply a voltage to the inactive phase windings, receive, from a current sensor connected to the electric motor, a current for each inactive phase winding of the inactive phase windings, determine an inductance for each inactive phase winding of the inactive phase winding based on the current, and determine a position of the rotor in the electric motor based on the inductance for each inactive phase winding.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.