Magnetic actuator with more than one air gap in series
US8729984B2 · kind B2 · utility
4Cited by
16References
16Claims
0Family size
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Key dates
| Filing date | Jun 6, 2011 |
| Grant date | May 20, 2014 |
| Priority date | — |
| Expiry date | Jul 29, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H50/163
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Systems and methods provide a magnetic actuator having more than one air gap. After the trip unit is triggered, a first armature is accelerated to quickly close a first air gap and then mate with a second armature. The first and second armature then move toward a core to close a second air gap and reach the final combined armature position, causing a contact to open. A faster reaction time is provided, yet without increasing the number of turns of the trip coil winding, and provides a more efficient actuator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.