Abstract: A permanent magnet electric generator includes a housing, and a stator and a rotor assembly disposed inside the housing. The rotor assembly has annular inner and outer rings concentric with the axis of rotation. A plurality of permanent magnets is distributed on the inner surface of the outer ring. The stator assembly includes a plurality of stator blocks configured to form an annular ring-shaped stator member. The stator member is concentric with the axis of rotation and is interposed between the inner and outer rings such that the outer ring circumferentially encircles the stator member. The stator member is wound with a three-phase winding for a three-phase voltage output.

Abstract: A permanent magnet electric generator includes a housing, and a stator and a rotor assembly disposed inside the housing. The rotor assembly is concentric with an axis of rotation. The rotor assembly has annular inner and outer rings concentric with the axis of rotation. The rotor assembly is adapted to be rotationally coupled to a shaft. The shaft is rotationally coupled to a source of rotational energy for rotating the rotor assembly. A plurality of permanent magnets are distributed on the inner surface of the outer ring. Each magnet has a north pole and a south pole aligned to the axis of rotation such that adjacent magnets have poles of alternating polarity. The permanent magnets are distributed circumferentially on the inner surface of the outer ring and in close proximity to the stator blocks. The stator assembly is at a static location with respect to and in close proximity to the rotor assembly.