Patent ID: 7350283
Filing Date: 2008-04-01
Classification: F04D,F05D,H02K,Y10T

Abstract:
1. A method for making a rotor for a permanent magnet electric machine comprising the steps of providing a permanent magnet in an annular configuration and in an un-magnetized condition, providing an annular back-up member for the permanent magnet adapted to receive the magnet on its inner surface and to serve with the magnet affixed thereto as a rotor in an electric machine, affixing the permanent magnet to the back-up member in the desired position, over-molding the assembled magnet and back-up member in an injection molding operation so that the magnet and back-up member are substantially completely embedded in the plastic with the inner side and at least one end of the magnet completely covered by plastic, and magnetizing the permanent magnet in one or more sections.