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In a homopolar, switched reluctance, or interior permanent magnet motor, formed rotor laminations are employed to reduce eddy current losses in the pole faces and body of the rotor. The homopolar and switched reluctance motor lamination is comprised of a magnetic portion having a plurality of pole p

In a homopolar, switched reluctance, or interior permanent magnet motor, formed rotor laminations are employed to reduce eddy current losses in the pole faces and body of the rotor. The homopolar and switched reluctance motor lamination is comprised of a magnetic portion having a plurality of pole pieces extending generally radially outward from the core portion and forming a plurality of interpole spaces. Non-magnetic, high resistance segments are bonded between the pole pieces to minimize windage losses and increase strength. The non-magnetic segments may be thinner in the axial direction than the magnetic portion to prevent contact between stack laminations. Additionally, a gap may be left between the interior core portion and the non-magnetic segment to facilitate use of automated welding techniques. In the interior permanent magnet motor lamination, the non-magnetic segments perform the function of circumferential bridges, with or without restraining ligaments, to increase the rotor strength and speed capability and increase specific torque.

대표청구항 ▼

A method for constructing a disk lamination for the rotor of a homopolar or switched reluctance magnetic machine comprising: (a) providing a magnetic portion of a disk lamination having an interior core portion of uniform thickness and a plurality of pole pieces extending generally outward therefrom

A method for constructing a disk lamination for the rotor of a homopolar or switched reluctance magnetic machine comprising: (a) providing a magnetic portion of a disk lamination having an interior core portion of uniform thickness and a plurality of pole pieces extending generally outward therefrom along respective radial lines so as to define an outer circumferential disk edge and form an interpole space, respectively, between each adjacent pair of said pole pieces, respectively; (b) inserting the magnetic portion in a jig, the jig comprising a plurality of tables corresponding geometrically in location and configuration to the plurality of interpole spaces; (c) positioning the magnetic portion such that the pole pieces are position�