Rotor for electric motor and brazing process
US8684257B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 15, 2011 |
| Grant date | Apr 1, 2014 |
| Priority date | — |
| Expiry date | Jun 22, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K17/20
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A plurality of conductor bars are positioned within slots of a laminated electric steel disc stack, and the ends of the conductor bars are brazed to end rings to manufacture a rotor. The method includes inserting the conductor bars into the slots of the disc stack, providing the end rings with slots for receiving the ends of the conductor bars; positioning spacers of braze material adjacent each end of each of the conductor bars to create a gap between the end rings and the steel disc stack; and applying heat to melt the braze material of the spacers whereby braze material is furnished by the spacers of braze material to braze the first and second ends of the conductor bars to the first and second end rings. Channels are provided in the face of the end rings facing the steel disc stack to drain away excess braze material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.