Embedded permanent magnet-type electric motor, compressor, and refrigeration/air-conditioning device
US10090743B2 · kind B2 · utility
4Cited by
5References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 16, 2015 |
| Grant date | Oct 2, 2018 |
| Priority date | — |
| Expiry date | Apr 16, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K21/14
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In an interior permanent magnet motor, a magnet insertion hole of a rotor core is curved into an arc shape, and a convex portion side of the arc shape is arranged on a center side of a rotor. The magnet insertion hole has a first line, a second line, and a pair of third lines. The first line is located on the radially outer side of the second line. Each of the third lines connects the first line and the second line to each other. The first line includes an arc portion and a pair of concave portions. Each of the concave portions is located at an end of the arc portion of the first line.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.