ROTOR ASSEMBLY FOR ELECTRIC MACHINE HAVING MECHANICAL RETENTION SYSTEM FOR MAGNETS.

摘要

A rotor assembly for an electric machine includes a plurality of lamination sheets. Each of the lamination sheets defines an aperture. The lamination sheets are disposed adjacent each other to define a laminated stack. The apertures are aligned with each other to define a slot extending parallel with a central axis of the laminated stack. A magnet is disposed within the slot. The lamination sheets include a group of recess lamination sheets and a tab lamination sheet. The tab lamination sheet includes a tab that extends into the slot, and into abutting engagement with the magnet to bias the magnet against a wall of the slot. The apertures of the group of recess lamination sheets include a groove portion that defines a groove. The tab of the tab lamination sheet is at least partially disposed within the groove defined by the recess lamination sheets.