Linear motor with an elongated core using oppositely polarized magnets to maximize perpendicular flux lines
US4868431A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 4, 1988 |
| Grant date | Sep 19, 1989 |
| Priority date | — |
| Expiry date | Mar 4, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K41/03
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention is related to a linear motor which is composed of mainly: PA0 (a) an elongated primary magnetic member for generating a traveling magnetic field traveling along the length; PA0 (b) a secondary magnetic member for generating a stationary magnetic field, the secondary magnetic means having an elongated core, pair of permanent magnets attached to the core so as to sandwich the core from upper and lower sides, each pair being spaced constantly from each other, direction of polarity of the magnets forming a pair coinciding to each other, direction of polarity interchanging in turn from one pair to another; and PA0 (c) a support member supporting one of the primary magnetic member and the secondary magnetic member against the other so that the former is slidable along its axis against the latter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.