Patent ID: 6084330
Filing Date: 2000-07-04
Classification: H02K,Y10T

Abstract:
A permanent magnet rotor comprising:a cylindrical rotor core member having a longitudinal axis, first and second flat ends and an outer surface having an outer radius of curvature;a plurality of arcuate magnetic elements, each of said magnetic elements having longitudinally extending opposed radial end surfaces and inner and outer radii of curvature, said inner radius of curvature being substantially equal to the outer radius of curvature of said core member such that said magnetic elements fit closely against said outer surface of said core member;a hollow cylindrical retaining shell having an inner circumference, and an inner radius of curvature substantially equal to the outer radius of curvature of said magnetic elements such that said retaining shell fits closely around said magnetic elements when said magnetic elements are positioned around said core member;means for preventing relative movement between said core member, said magnetic elements, and said retaining shell; andfirst and second annular end plates secured to said first and second flat ends of said core member, respectively, said plates having an outer circumference substantially equal to the inner circumference of said retaining shell,wherein said means for preventing relative movement comprises adhesive applied between said retaining shell and said magnetic elements, and between said magnetic elements and said core member.