Cooling structure and cooling method of rotating electrical machine
US7911091B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jul 11, 2008 |
| Grant date | Mar 22, 2011 |
| Priority date | — |
| Expiry date | Jan 22, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K9/197
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A cooling structure of a rotating electrical machine including a stator and a rotor, the cooling structure including magnet accommodating holes provided in a rotor core of the rotor, the magnet accommodating holes extend between axial core end faces of the rotor core, wherein permanent magnets are accommodated in the magnet accommodating holes; a plurality of voids, which prevent leakage flux, in contact with the permanent magnets and extending between the axial core end faces; and a rotor cooling-liquid supply passage that supplies cooling liquid to one core end face, wherein the cooling liquid supplied from the rotor cooling-liquid supply passage is introduced into the voids to prevent leakage flux, and the permanent magnets are cooled by the cooling liquid flowing through the voids.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.