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A permanent magnet rotor for an electric generator or motor has a core lamination hub formed of a stack of generally round plates with peripheral slots for holding the first end of a rectangular magnet. Each magnet has an outer end which is held by a slotted pole piece formed of laminated plates. Fi

A permanent magnet rotor for an electric generator or motor has a core lamination hub formed of a stack of generally round plates with peripheral slots for holding the first end of a rectangular magnet. Each magnet has an outer end which is held by a slotted pole piece formed of laminated plates. First and second side plates overlie each side of the hub, magnets and pole pieces, and fasteners such as rivets are passed through holes in the side plates, hub plates and pole pieces to form a rigid rotor in which each rectangular magnet is supported and restrained on all six sides. A method for fabricating the rotor is also disclosed.

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[ What is claimed is:] [1.] A rotor for an electrical energy conversion transducer, and useable on a rotatable shaft, comprising:a hub having a central axial hole for mounting on the shaft, said hole having a central axis;a plurality of permanent magnets arrayed about said hub and having inner and o

[ What is claimed is:] [1.] A rotor for an electrical energy conversion transducer, and useable on a rotatable shaft, comprising:a hub having a central axial hole for mounting on the shaft, said hole having a central axis;a plurality of permanent magnets arrayed about said hub and having inner and outer ends;said hub formed as a unitary laminated core from a stacked plurality of flat metal plates, each said flat metal plate continuously encircling said shaft and having an outer periphery;a plurality of spaced slots in said outer periphery for retaining the said inner ends of said permanent magnets;a plurality of magnetically conductive pole pieces positioned On the outer ends of said magnets: andfirst and second side plates positioned on axially opposing sides of said hub, magnets and pole pieces and connected to said hub and pole pieces by fasteners.