Electric motor with permanent magnet and compressor having the same
US10840757B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 5, 2018 |
| Grant date | Nov 17, 2020 |
| Priority date | — |
| Expiry date | Nov 27, 2038 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04C2210/26
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electric motor includes a stator, and a rotor spaced apart from the stator by a gap. The rotor includes a first magnet that generates first magnetic flux, that includes first magnetic portions arranged in a circumferential direction of the rotor, and that are configured to generate a magnetic field in the gap, and second magnetic portions that are alternately arranged with the plurality of first magnetic portions along the circumferential direction of the rotor. The rotor further includes a plurality of second magnets that are each located between a first magnetic portion of the first magnetic portions and a second magnetic portion of the second magnetic portions that is adjacent to the first magnetic portion, where each second magnet generates second magnetic flux that is greater than the first magnetic flux, and the first magnet is located radially between the gap and the plurality of second magnets.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.