Linear motor of moving-coil type
US4758750A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 12, 1987 |
| Grant date | Jul 19, 1988 |
| Priority date | — |
| Expiry date | Feb 12, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K41/031
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A linear motor of moving-coil type is disclosed, in which a multi-phase moving coil includes a plurality of flat coil units each not wider than the longitudinal length of a permanent magnet making up a stationary part divided by the number of coil phases, the flat coil units being arranged successively in the same plane with central parts not adjacently overlaid one on the other. The central parts of the moving flat coil units have a thickness equivalent to a single phase in spite of the multiple phases of the moving coil. Thus a great electromagnetic force is generated, and at the same time a high propulsive force is obtained with the magnetic flux density not reduced in the gap accomodating one phase of coils alone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.