Moving magnet actuator
US4775908A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 24, 1987 |
| Grant date | Oct 4, 1988 |
| Priority date | — |
| Expiry date | Apr 24, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K41/02
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A moving magnet rotary actuator is provided for use in a memory device of the type having a magnetic memory disk upon which data may be stored and read. The actuator includes a rotary body coupled to one or more elongated arms which support read/write transducer heads. A permanent magnet, driven by the magnetomotive forces which are generated by the energization of a stationary coil mounted opposite and adjacent to the magnet, is mounted on and moves with the body. Rotation of the body moves the heads from track to track on the magnetic memory disk. The direction of movement is determined by the polarity of the current through the coil; and the speed and distance of actuator travel is determined by the magnitude of the current.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.