Linear electric motor and method of using and constructing same
US5734209A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 17, 1994 |
| Grant date | Mar 31, 1998 |
| Priority date | — |
| Expiry date | Oct 17, 2014 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B47/06
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A small diameter linear motor is relatively short in length, and includes a hollow elongated mover, and a stator having a plurality of annular spaced apart stator teeth. Individual electrical coils are wound from individual uninterrupted single wires extending from outside of the assembly in the spaces between the teeth to avoid the need for electrical connections between the coils. The stator assembly and mover are dimensioned to fit within the hollow interior of a ferromagnetic tube. In another form, the linear motor includes a mover and a stator, the stator including a set of coils for producing a series of electromagnetic fields extending at least partially in an axial direction when energized with an electric current and a stator core defining a plurality of spaced-apart transversely disposed coil receiving slots and an annular axially extending mover receiving bore. The mover includes an elongated member mounted telescopically and reciprocatively within the mover receiving bore and a plurality of permanent magnets interleaved with low reluctance spacers for helping to reduce core flux density in order to improve overall motor performance. The assembly further includes a cartr…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.