Patent ID: 7854059
Filing Date: 2010-12-21
Classification: H02K,Y10T

Abstract:
1. Apparatus for assembling a permanent magnet rotor, the rotor being comprised of a non-magnetic cylindrical shaft having a larger diameter central axial section and two smaller diameter bearing sections, the central section having an even number of recesses defining an even number of ribs with overhung slots, said apparatus comprising a fixture configured to slide over a smaller diameter bearing section of the rotor and abut one end of the central section, the axial end of the fixture adjacent the central section having a configuration matching the central section, including ribs and overhung slots, whereby magnets in magnet carriers and C-shaped lamination stacks can be assembled over the ribs of the fixture, said apparatus further comprising a split compression ring having an inner diameter that is sized to ride over the outer diameter of the C-shaped lamination stacks and means for joining the split compression ring to compress the C-shaped lamination stacks sufficiently to provide a riding clearance between the C-shaped lamination stacks and the overhung slots.