manufacturing method for variable laminations used in electro-magnetic induction devices
US5604971A · kind A · utility
Inventor
Key dates
| Filing date | Aug 12, 1994 |
| Grant date | Feb 25, 1997 |
| Priority date | — |
| Expiry date | Aug 12, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49078
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for forming and stacking laminations that are used in an electro-magnetic device such as a motor or transformer is disclosed. The method steps and apparatus used provides the incremental forming of a predetermined number of laminations from magnetically conductive material with each lamination having at least one coil winding segment of predetermined incrementally varying width. Each coil winding segment is formed by the movement of forming elements such as punching or stamping dies or laser devices and the magnetically conductive material relative to one another. Following formation of the laminations with the aforementioned coil winding segments of predetermined incrementally varying width, the laminations, with the formed coil winding segments, are stacked to provide a combined generally circular outer cross sectional winding area about which a predetermined length of conductive wire can be positioned, either directly around the cross sectional winding area about a bobbin wound with the electrically conductive wire, or about a split bobbin first assembled over the winding area and then subsequently wound with electrically conductive wire. When the forming …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.