Multiple field motor controller
US9397603B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 14, 2014 |
| Grant date | Jul 19, 2016 |
| Priority date | — |
| Expiry date | Mar 26, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P25/18
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electric motor including a first conductive winding, a second conductive winding, a rotor, and a controller is disclosed. When energized by an AC source, the first conductive winding generates a first magnetic field. The second conductive winding, which is configured to be selectively energized by the AC source via one or more switches, is arranged so as to generate a second magnetic field superimposed with the first magnetic field when so energized. The rotor magnetically interacts with the first magnetic field, or the superimposed first magnetic field and second magnetic field, such that a torque is applied on the rotor. The controller is configured to: (i) obtain a measurement of a voltage of the AC source; (ii) make a determination, based on the measurement, whether to energize the second conductive winding; and (iii) energize the second conductive winding in accordance with the determination.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.