Patent ID: 8333666
Filing Date: 2012-12-18
Classification: F04D,H01F,H02K,Y10T

Abstract:
1. A magnetic driving element comprising: a unit including a plurality of magnets supported on a yoke, the unit including a molding support region; and a shell fully encapsulating the yoke and magnets with a continuous layer of polymer resin and free from any fused plastic at the molding support region, the molding support region configured to receive a support during molding of the shell; a protective coating arranged over the magnets and the yoke and providing a barrier that seals the magnets relative to the yoke, wherein the shell is of a different material than that of the protective coating, and wherein the protective coating is an epoxy polyester powder coating; a metallic sleeve arranged over the magnets, wherein gaps are formed between the magnets and the metallic sleeve, and the shell is arranged over the metallic sleeve; and a potting material arranged in the gaps, wherein the protective coating is of a different material than the potting material, and wherein the potting material includes an epoxy resin with an elastomer and aluminum pigments.