Patent ID: 8234776
Filing Date: 2012-08-07
Classification: H02K,Y10T

Abstract:
1. A process for making a magnetically keyed rotor, comprising the steps of: a) Providing an un-magnetized annular permanent magnet of anisotropic material composition and corresponding molecular polarity grain, with said member having an axis and bore concentric with said axis, and said grain orthogonal to any plane containing said axis, and comprising the step of placing or integrating a coupling means within said plane and dividing a section of said grain into equal sections of opposite polarities, so as to form a grain-keyed magnet, and b) Providing a mechanically keyed shaft, with said member having an axis, and comprising the step of adding or integrating an alignment means into said member, and synchronized with said member, so as to form an aligned shaft, and c) Assembling said aligned shaft and said grain-keyed magnet by passing said shaft slidably through said hole in said magnet, allowing shaft and magnet axes to coincide, and allowing said alignment means in said shaft to align along said coupling means in said magnet, and applying a mechanical permanent attachment means between said shaft and said magnet, so as to form a mechanically keyed rotor assembly having an axis, and magnetizing said rotor assembly radially, flux orthogonal to said rotor axis, without regard to any rotational or angular reference key on any magnetization fixture, so as to form said permanent magnetic field, whereby said magnetization of said assembly in said random-angle fashion nevertheless angularly synchronizes said permanent magnetic field to said mechanically keyed shaft and forming a magnetically keyed rotor.