초록 ▼

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 composite disk lamination for a rotor of a magnetic machine selected from the group consisting of homopolar and switched reluctance machines, comprising: a magnetic portion of uniform thickness and including an interior core portion with a plurality of pole pieces extended outwardly therefrom in a

A composite disk lamination for a rotor of a magnetic machine selected from the group consisting of homopolar and switched reluctance machines, comprising: a magnetic portion of uniform thickness and including an interior core portion with a plurality of pole pieces extended outwardly therefrom in a generally radial direction, each of said pole pieces having a pair of edges extending outward in a generally straight line and forming an interpole space between each adjacent pair of said pole pieces; a plurality of non-magnetic segments having a uniform thickness, a separate one of said segments being situated, respectively, within each of said interpole spaces, respectively, and abutting one edge of each pole piece of said adjacent pair, each of the abutting edges of the non-magnetic segments, respectively, being parallel to a corresponding one of the edges of the pole pieces, respectively, and being rigidly attached thereto so as to provide said disk lamination with high structural strength without increasing windage losses in said rotor; and each of said non-magnetic segments further being formed in a generally trapezoidal shape having two non-parallel edges abutting opposite edges of the adjacent pole pieces, respectively, and having an inner edge facing an outer circumferential edge of said interior core portion and having an outer edge forming a contiguous circumferential edge with outer edges of said pole pieces.