Linear magnetic actuator
US5719451A · kind A · utility
30Cited by
8References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 16, 1996 |
| Grant date | Feb 17, 1998 |
| Priority date | — |
| Expiry date | Jan 16, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K33/16
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A linear magnetic actuator has a pair of stator windings (14, 15) of opposite polarity formed inside a cylindrical soft iron shell (16) providing a slotless back iron piece. The axially movable shuffle comprises a soft iron shaft (11) with a pair of radially magnetised annular permanent magnets (12 and 13). The arrangement has cylindrical symmetry and the stator windings are as thin as possible to minimise the air gap between the cylindrical pole faces of the annular magnets and the back iron.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.