Liquid cooled electric motor frame
US5859482A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 14, 1997 |
| Grant date | Jan 12, 1999 |
| Priority date | — |
| Expiry date | Feb 14, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K15/14
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Liquid cooled electric motors including stator frames having cast in place cooling conduits are described. In an exemplary embodiment, the conduit is arranged in a generally helical configuration and the stator frame is cast around the conduit so that the conduit is embedded within, and integral with, the frame. Spacer, or stabilizer, bars are engaged to the conduit and provide support for the conduit and facilitate maintaining the desired spacing between lengths of conduit and between the conduit and the frame wall. The stator frame with the cast in place cooling conduit has the advantages of a liquid cooled motor yet is believed to be lower cost than known liquid cooled motors. The frame also is believed to be less susceptible to corrosion and liquid leaks as compared to known liquid cooled motors. Further, the advantage that the cooling coil and frame material may be different is provided, which enables selection of optimum material for the coil and frame with respect to cost, corrosion resistance, mechanical strength, and machinability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.