Electricity: magnetically operated switches – magnets – and electr – Magnets and electromagnets – With magneto-mechanical motive device
Patent
1996-09-12
2000-05-23
Gellner, Michael L.
Electricity: magnetically operated switches, magnets, and electr
Magnets and electromagnets
With magneto-mechanical motive device
335222, 335232, 310 13, 310 14, 310 15, 310 22, 310 23, 310 24, F16C 3900, H01F 700, H01F 708
Patent
active
060669985
ABSTRACT:
An actuator made up of a plurality of actuator elements is provided which actuator provides long travel in one dimension and short travel in five additional dimensions, with each actuator element providing long travel in the one dimension and short travel in at least two additional dimensions. For preferred embodiments, each actuator element includes a suspension core, the long travel being in one linear dimension and each actuator element providing short travel in two additional linear dimensions and at least one rotary dimension. More particularly, each actuator element includes an electrodynamic drive for providing controlled movement in the first dimension, which drive includes a voice coil mounted in a voice coil gap and at least one elongated high permeability core which is movable in the first dimension with respect to the voice coil; an electromagnetic drive for providing controlled movement in the at least one additional dimension (and in the two additional linear dimensions and at least one rotary dimension for preferred embodiments), which drive includes at least one high permeability suspension core spaced from the at least one elongated core by small gaps and windings for selectively inducing fluxes in the small gaps; and a magnetic source for providing bias flux to both the voice coil gap and the small gaps.
REFERENCES:
patent: 4387935 (1983-06-01), Studer
Schwartz, L.S., Magnetic Optical Bearing (MOB) Design for Mirror Wavelength Scans in a Spaceborne Interferometer, MIT, May 1995.
Schwartz Lawrence S.
Trumper David L.
Barrera Raymond
Gellner Michael L.
Massachusetts Institute of Technology
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