Patent ID: 9130446
Filing Date: 2015-09-08
Classification: H02K,Y02E

Abstract:
1. An electrical slip coupling assembly for enhancing variable transmission of torque between rotating members, comprising: a field member comprising a disparate number of flux concentrating axial teeth protruding axially from a body of said field member, and flux concentrating radial teeth protruding radially from said body of said field member; an armature member concentrically disposed in relation to said field member, said armature member defining an axial air gap between an axial inner surface of said armature member and said flux concentrating axial teeth of said field member, and a radial air gap between a radial inner surface of said armature member and said flux concentrating radial teeth of said field member; an interchangeable non-ferrous electrically conductive material cladding disposed on said axial inner surface of said armature member, facing said flux concentrating axial teeth of said field member; a relatively low conductivity ferrous material cladding disposed on said radial inner surface of said armature member, facing said flux concentrating radial teeth of said field member; and one or more annular windings disposed around said field member, wherein excitation of said one or more annular windings induces said flux concentrating axial teeth and said flux concentrating radial teeth of said field member to generate flux field concentrations across said axial air gap and said radial air gap respectively, and wherein said flux field concentrations create an axial eddy current zone in said armature member facing said flux concentrating axial teeth across said axial air gap, and a radial eddy current zone in said armature member facing said flux concentrating radial teeth across said radial air gap, and wherein eddy currents in said axial eddy current zone and said radial eddy current zone of said armature member, generated by relative motion between said field member and said armature member and said excitation of said one or more annular windings, create a driving torque between said field member and said armature member; whereby said non-ferrous electrically conductive material cladding in said axial eddy current zone and said relatively low conductivity ferrous material cladding in said radial eddy current zone enable said enhanced variable transmission of said driving torque between said field member and said armature member over a range of slip speeds.