Liquid-cooled electrical machine
US6072253A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 7, 1998 |
| Grant date | Jun 6, 2000 |
| Priority date | — |
| Expiry date | Dec 7, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K5/203
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An liquid-cooling system for an electrical machine comprises a rotor mounted on a shaft for rotation therewith and defining an axis of rotation, and a stator disposed coaxially with and in opposition to the rotor. The stator has stator windings, the stator windings having an axially-extending portion. The electrical machine further comprises a housing enclosing the stator and the rotor, the housing having an axial end, the axial end having a wall with an inner surface and an outer surface. The electrical machine also includes a cooling tube having a first end and a second end and an embedded portion thereof embedded between the first inner surface and the first outer surface, the embedded portion of the cooling tube located in substantial axial alignment with the axially-extending portion of the stator windings. In another aspect of this design, the inner surface of the wall of the axial end of the housing is substantially flat and is separated from an axial end of the rotor by an air gap. In a third aspect of this design, the housing of the electrical machine comprises a front housing portion and a rear housing portion. The front housing portion defines a first circumferentially-e…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.