Invention Grant
US08378543B2 Generating electromagnetic forces in large air gaps 有权
在大气隙中产生电磁力

Generating electromagnetic forces in large air gaps
Abstract:
An electromagnetic actuator generates electromagnetic forces across large radial gaps to support a body. The actuator has an actuator target having a rotational axis, and a target magnetic element arranged circumferentially around the rotational axis that has inner and outer magnetic poles. A cylindrical soft-magnetic target pole is magnetically coupled to the outer cylindrical magnetic pole of the target magnetic element. An actuator base includes radial poles arranged circumferentially around and radially spaced apart from the cylindrical soft-magnetic target pole. The radial poles and the cylindrical soft-magnetic target pole are magnetically coupled and define a plurality of magnetic control circuits. Control coils around the radial poles are configured to produce magnetic fluxes in the magnetic control circuits. The target magnetic element, the cylindrical soft-magnetic target pole, and the radial poles are magnetically coupled and define a magnetic bias circuit, the magnetic element producing magnetic flux in the magnetic bias circuit.
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