Patent ID: 7592736
Filing Date: 2009-09-22
Classification: H02K

Abstract:
1. A permanent magnet, brushless electric generator comprising: a housing; a rotor assembly disposed inside the housing and being concentric with an axis of rotation, the rotor assembly having an axially disposed annular outer ring and a laminated inner ring, the laminated inner ring being formed by a plurality of thin, ring-shaped magnetically permeable material, the rotor assembly having a cylindrical rotor hub concentric with the axis of rotation, the rotor hub adapted to be rotationally coupled to a shaft for rotating the rotor assembly, the rotor assembly having a plurality of magnets distributed on the inner surface of the outer ring, each magnet having a north pole and a south pole aligned to the axis of rotation such that adjacent magnet have poles of alternating polarity; a stator assembly secured inside the housing at a static location with respect to and in close proximity to the rotor assembly, the stator assembly having a plurality of stator blocks placed in the form of an annular ring-shaped stator member retained by a support structure, the stator blocks being formed by a plurality of I-shaped strips of magnetically permeable material, the stator member being concentric with the axis of rotation and being interposed between the inner and outer rings such that the outer ring circumferentially encircles the stator member, the stator member wound in a three-phase winding, wherein electricity is generated in the three-phase winding by rotation of the rotor assembly in relation to the stator assembly.