Forceless non-contacting power transformer
First Claim
1. A magnetically suspended platform including means for coupling electrical power and optical control signals to the platform free from inductive reaction torques comprising:
- a support base,a magnetic bearing assembly mounted on said base having a movable armature of magnetically permeable material coupled to support said platform, and to provide axial, radial, angular, and rotational displacement thereof,inductive coupler means having a first winding for energization by a source of electrical power and a second winding for coupling at least a portion of said electrical power to said platform,an enclosed toroidal core of magnetically permeable material, said core having a base centrally disposed on said support base and defining a magnetic flux path substantially free of air gaps, having an axial bore free of conducting members, for propagating said optical control signals therethrough, and further defining an annular chamber for receiving said first and second annular electrical windings, said chamber having a first axial dimension and first and second radial dimensions, said first radial dimension defining an inner wall of said chamber and said second radial dimension defining an outer wall of said chamber,said first electrical winding positioned coaxially in stationary contact with said magnetic core on said outer wall and having a second axial dimension coincident with said first axial dimension and defining a second radial dimension with respect to said chamber,said second electrical winding positioned raidally and axially within at least a portion of said first winding, having a third axial dimension and a third radial dimension,said axial dimensions of said second electrical winding and said first electrical winding having a first predetermined ratio such that said second electrical winding is free to move in an axial direction over at least a distance of three times said axial displacement, said radial dimensions of said second electrical winding and said first electrical winding having a second predetermined ratio such that said second electrical winding is free to move in a radial direction over at least a distance of 1.5 times said radial displacement, andmeans coupled to said platform for receiving said electrical power coupled to said second electrical winding while said platform is activated over said axial, radial, angular and rotational displacements,so that said secondary winding is operative within a zone of uniform flux linkages wherein the axial and radial forces are of negligible magnitude.
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Accused Products
Abstract
A transformer for coupling electrical power from a stationary location to a moving location with a minimum of disturbance forces between the stationary and moveable components. The transformer is particularly adapted to coupling power to a magnetically suspended platform. The transformer includes an enclosed core housing two windings, a stationary primary coil, and a secondary coil free to move linearly and angularly over a limited displacement, where the secondary coil is affixed to the moveable platform, thereby enabling energy to be extracted for powering apparatus mounted within the platform.
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Citations
4 Claims
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1. A magnetically suspended platform including means for coupling electrical power and optical control signals to the platform free from inductive reaction torques comprising:
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a support base, a magnetic bearing assembly mounted on said base having a movable armature of magnetically permeable material coupled to support said platform, and to provide axial, radial, angular, and rotational displacement thereof, inductive coupler means having a first winding for energization by a source of electrical power and a second winding for coupling at least a portion of said electrical power to said platform, an enclosed toroidal core of magnetically permeable material, said core having a base centrally disposed on said support base and defining a magnetic flux path substantially free of air gaps, having an axial bore free of conducting members, for propagating said optical control signals therethrough, and further defining an annular chamber for receiving said first and second annular electrical windings, said chamber having a first axial dimension and first and second radial dimensions, said first radial dimension defining an inner wall of said chamber and said second radial dimension defining an outer wall of said chamber, said first electrical winding positioned coaxially in stationary contact with said magnetic core on said outer wall and having a second axial dimension coincident with said first axial dimension and defining a second radial dimension with respect to said chamber, said second electrical winding positioned raidally and axially within at least a portion of said first winding, having a third axial dimension and a third radial dimension, said axial dimensions of said second electrical winding and said first electrical winding having a first predetermined ratio such that said second electrical winding is free to move in an axial direction over at least a distance of three times said axial displacement, said radial dimensions of said second electrical winding and said first electrical winding having a second predetermined ratio such that said second electrical winding is free to move in a radial direction over at least a distance of 1.5 times said radial displacement, and means coupled to said platform for receiving said electrical power coupled to said second electrical winding while said platform is activated over said axial, radial, angular and rotational displacements, so that said secondary winding is operative within a zone of uniform flux linkages wherein the axial and radial forces are of negligible magnitude. - View Dependent Claims (2, 3, 4)
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Specification