Electromagnet magnetic circuit with permanent-magnet armature
US4191937A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 18, 1978 |
| Grant date | Mar 4, 1980 |
| Priority date | — |
| Expiry date | Apr 18, 1998 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H51/20
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A magnetic circuit comprising a fixed core, yokes having flat portions in parallel planes, and an armature comprising a permanent magnet provided with pole pieces having end portions projecting on either side of the magnet, a flat portion of a first one of said yokes penetrating into the space between two end portions of the pole pieces located on one side of the magnet axis, the air gap surfaces of said yokes and of said pole pieces extending normally to the magnet axis and, one the other side thereof, at least one projecting end portion of said pole pieces penetrating between two flat portions of second and third yokes carried by a same free end of the core. Such a magnetic circuit is suitable for monostable or bistable operation in relays, contactors or solenoid valves.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.