Centrifugally-cast shorted structure for induction motor rotors
US8347485B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 12, 2010 |
| Grant date | Jan 8, 2013 |
| Priority date | — |
| Expiry date | Nov 30, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49012
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A procedure for centrifugally casting a shorted structure around induction motor rotors is described. The method is commonly applied to a plurality of rotors disposed and arranged for rotational balance and supported on a suitable support, or optionally, on a plurality of supports arranged in layered fashion about a common rotational axis. The method comprises forming a wax representation of the shorted structure around a lamination stack; mounting a plurality of such lamination stacks in a mounting fixture and-attaching a suitable gating and runner system; forming an investment by coating the structure with refractory followed by melting out the wax; casting molten metal into the investment while it is rotating and aligning the mold to allow the centrifugal force generated to promote mold filling; and, continuing to rotate the investment until solidification is substantially complete.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.