Rotor lamination stress relief

摘要

A multilayer laminated rotor is mountable on a shaft for rotation relative to a stator of a rotary electric machine arrangement. The rotor has a plurality of laminas, joined together, and voids for receiving magnets. An annular rotor section, which surrounds a shaft opening within which the shaft is receivable, extends between the shaft opening and a radially outer circumferential rotor surface. The annular section mentioned includes an undulating series of the voids in void groups extending from the radially outer circumferential rotor surface inwardly toward the shaft opening and then back toward the radially outer circumferential rotor surface, as well as a solid radially interior portion without any of the voids. Distal voids in the void groups include curved, arcuate, or recurved stress relieving features extending inwardly from radially innermost corner locations of the distal voids.

主权项

1. A multilayer laminated rotor, mountable on a shaft for rotation relative to a stator of a rotary electric machine arrangement, having a plurality of laminas joined together to form the rotor with voids for receiving magnets, the rotor comprising:
an annular section surrounding a shaft opening within which the shaft is receivable, the annular section extending between the shaft opening and a radially outer circumferential rotor surface, the annular section including an undulating series of the voids in void groups extending from the radially outer circumferential rotor surface inwardly toward the shaft opening and then back toward the radially outer circumferential rotor surface as well as a solid radially interior portion without any of the voids, wherein a pair of distal voids in each void group include curved, arcuate, or recurved void sections curving radially inwardly with respect to the rotor from radially innermost corner locations of said pair of distal voids and then turning back radially outwardly with respect to the rotor so that ends of the void sections are disposed away from the solid radially interior portion of the annular section.