Patent ID: 6826824
Filing Date: 2004-12-07
Classification: H02K,Y10T

Abstract:
A method for embedding magnets in a rotor core, comprising:positioning a rotor core having a first positioning element into a die having a second positioning element, the first positioning element engaging the second positioning element to hold the rotor core in a fixed position with respect to the die, the first positioning element formed on an outside circumference of the rotor core, the second positioning element formed on an inside circumference of the die, the rotor core being positioned in the die with the first positioning element aligned with the second positioning element, the die further comprising at least one ejector pin that abuts a face of the rotor core when the rotor core is positioned in the die; filling slits in the rotor core with resinous magnet; applying a magnetic field to the resinous magnet in each slit to establish a magnetic orientation for the resinous magnet in each slit, the first positioning element and the second positioning element preventing the rotor core from moving under the influence of the magnetic field; and pushing on the at least one ejector pin to force the rotor core out of the die when the resinous magnet in the slits has hardened.