Patent ID: 8310122

Claim:
A rotating machine comprising: a stator; and a rotor having: a rotor body, and a plurality of magnet holders mounted on the rotor body, the magnet holders configured to receive a plurality of magnet assemblies, each magnet assembly including two core plate stacks configured to support a permanent magnet, each core plate stack including: two end plates of substantially identical size and shape, each end plate defining at least one beveled through hole, a smaller diameter of each beveled through hole defined by one of said end plates being closer to the other end plate when the end plates are aligned; a plurality of intermediate core plates of substantially identical size and shape to each other and to the two end plates, each intermediate core plate defining a through hole corresponding to and aligned with a respective one of the at least one beveled through holes to form a plurality of respective bores extending between the end plates and through all of the intermediate plates; and a separate in situ plastic tie rod extending through each formed bore, each in situ plastic tie rod being distinct from the two end plates, each in situ plastic tie rod engaging the bevels of the respective beveled through holes of the two end plates to retain the end plates and the intermediate core plates in a stacked relationship to form said core plate stack.