Embedded permanent magnet type electric motor, compressor, and refrigeration air-conditioning device
US10020699B2 · kind B2 · utility
2Cited by
12References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 25, 2013 |
| Grant date | Jul 10, 2018 |
| Priority date | — |
| Expiry date | May 1, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K2213/03
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In an interior permanent magnet motor, a plurality of slits are formed between a rotor outer peripheral surface of a rotor and a radially-outer insertion hole contour surface of a magnet insertion hole. Assuming that a total area of the plurality of slits per magnetic pole is represented by Ss, and an area of a region in a rotor core on a radially outer side with respect to the corresponding one magnet insertion hole is represented by Si, the plurality of slits are formed so as to satisfy a relationship of 0.35≤Ss/Si≤0.5.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.