Actuator using magnetic shape memory material, coils and permanent magnets
US9450170B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 15, 2012 |
| Grant date | Sep 20, 2016 |
| Priority date | — |
| Expiry date | Aug 6, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10N35/85
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An actuator having a drive element made of a magnetic shape memory material is driven responsive to electrical control of a plurality of coil apparatuses and carries out an expansion movement in response to the control. The coil apparatuses are magnetically connected to the drive element via flux-concentrating apparatus having a flux-concentrating section associated with the coil apparatuses for interaction with the drive element. Each flux-concentrating apparatus has a core section and connecting section, which conducts a magnetic flux to the drive element, such that a magnetic flux-concentrating circuit for each of the coil apparatuses is formed by the common drive element. The flux-concentrating circuits are magnetically connected in parallel with one another, based on the common drive element, and/or a magnetic flux direction of a magnetic flux in the particular flux-concentrating circuit in the drive element has the same orientation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.