Three-pole electromagnetic actuator for pneumatic distributing devices
US5559378A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 30, 1994 |
| Grant date | Sep 24, 1996 |
| Priority date | — |
| Expiry date | Jun 30, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F7/122
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention relates to an electromagnetic actuator comprised of a stator structure made of soft magnetic material which is unsaturated in rated operating conditions, comprising two stator parts (1 and 2) at least one of the stator structures (1) presenting a central pole (5) having a length Y.sub.C and two side poles (6,7) having a length Y.sub.L said stator parts (1,2) delimiting an air gap E inside which there is arranged a rotor movable member comprising two pairs of poles having a length Y.sub.R comprised of thin permanent magnets (10 and 11) which are transversely magnetized, characterized in that the length Y.sub.C of the central stator pole (5) is longer or equal to the stroke Y of the rotor movable member increased by a length substantially equal to the length E of the air gap, the length Y.sub.L of the side poles (6,7) being determined by the volume occupied by the electric energization coil as a function of the force by the electric power applied and the thickness Z of said coil, this thickness Z being measured along an axis perpendicular to the plane of the thin magnets (10,11), the length Y.sub.L of the side poles (6,7) being longer than the length Y.sub.C of …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.