Patent ID: 7982350
Filing Date: 2011-07-19
Classification: H02K

Abstract:
1. A rotor-stator structure for electrodynamic machine comprising: field pole members each having an elongated shape oriented axially about an axis of rotation between pole faces disposed and the ends of the field pole members, the pole faces each having a surface oriented at an acute angle to the axis of rotation; and conical magnets arranged on the axis of rotation adjacent the pole faces, at least one of the conical magnets is a conical magnet comprising magnetic regions configured to confront at least a subset of the pole faces to form air gaps, the magnetic region having a surface being substantially coextensive with one or more acute angles to the axis of rotation, the magnetic regions each including one or more magnets and a magnetically permeable material disposed adjacent the one or more magnets, the one or more magnets having directions of polarization oriented circumferentially to establish a flux path portion between the surface of the magnetic region and at least one pole face in the subset of the pole faces, the flux path portion oriented at another acute angle relative to the axis of rotation.