Rotating electrical machine
US11601024B2 · kind B2 · utility
0Cited by
4References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 7, 2020 |
| Grant date | Mar 7, 2023 |
| Priority date | — |
| Expiry date | Jun 20, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K21/14
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In an IPM motor, since an end surface portion which is a pressed powder compact made of soft magnetic powder has a higher electrical resistivity than an electrical resistivity of a main body portion made of a laminated steel sheet, compared to when the electrical resistivity of the end surface portion is the same as the electrical resistivity of the main body portion, the occurrence of an eddy current in the end surface portion is further prevented. For this reason, in the IPM motor, a deterioration in efficiency caused by an eddy current loss is prevented, and an improvement in efficiency is realized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.