Permanent magnet embedded electric motor, compressor, and a refrigerating and air conditioning device
US10284030B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 1, 2014 |
| Grant date | May 7, 2019 |
| Priority date | — |
| Expiry date | Oct 24, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K2213/03
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A permanent magnet embedded electric motor includes a stator core disposed inside the frame and having a back yoke and a plurality of magnetic pole teeth; a rotor disposed on an inner diameter side of the plurality of magnetic pole teeth; and compression sections in which compression stress higher than compression stress occurring in the back yoke due to pressing force generated between the frame and the back yoke occurs. A compression section group having a set of two or more compression sections and of the plurality of compression sections is disposed on an outer circumferential section of the stator core. A sum of the rotating direction widths of the plurality of compression sections constituting the compression section group is smaller than a radial direction thickness of the frame.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.