Permanent magnet electrical rotating machine, wind power generating system, and a method of magnetizing a permanent magnet
US7847456B2 · kind B2 · utility
22Cited by
8References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 5, 2010 |
| Grant date | Dec 7, 2010 |
| Priority date | — |
| Expiry date | Apr 5, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E10/74
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A permanent magnet electrical rotating machine having a permanent magnet rotor and a stator, wherein:a plurality of permanent magnets are disposed in a rotor iron core of the permanent magnet rotor along a periphery of the rotor iron core, polarities thereof being alternately changed;a cooling airflow channel is formed between each pair of adjacent opposite poles on the rotor iron core; and the cooling airflow channel has an approximately trapezoidal shape on an outer periphery side of the rotor iron core; and extends from an end on a central side in a radial direction of the approximately trapezoidal shape to a radial center.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.