Magnetic slot wedge with low average permeability and high mechanical strength
US4425521A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 3, 1982 |
| Grant date | Jan 10, 1984 |
| Priority date | — |
| Expiry date | Jun 3, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S174/20
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A magnetic wedge for use in toothed stators holds the stator windings in the slots formed between the teeth of the stator. The magnetic slot wedge comprises a stack of magnetic material with a width corresponding to the width of the slot. The laminations each have central bridge portions connecting a first and second magnetic region, the bridge portion saturating during machine operation. The bridge and the first and second magnetic regions define an opening which, when the laminations are stacked, form a channel having a narrowed entrance. A fiberglass rod fits inside the channel and provides axial stiffness to the stacked laminations which clamp on the fiberglass rod.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.