| 摘要 |
A rotor assembly for an internal permanent magnet rotor comprises a plurality of interior laminations stacked to form a substantially continuous internal core and a plurality of external laminations stacked to form a substantially continuous external core. A plurality of permanent magnets are positioned between the internal and external cores and folded in the radial plane so as to form a substantially W-shaped arrangement. The magnets may be placed in slots formed through the stacked laminations between the internal and external core sections or the internal and external core sections may be formed as two separate units with the magnets sandwiched therebetween. The core laminations may be strengthened by using nonmagnetic inserts in selected positions which can be welded to the magnetic portions of the laminations. The outer core portion, when separate from the inner core portion, may be held against the inner core portion by bolts through the outer core portion or by a sleeve around the rotor assembly.
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