Magnetic gears and magnetic geared permanent magnet (PM) machines have recently been emerging as a new class of future electromechanical machines which can address problems of low-speed power generators. A magnetic geared generator integrates a magnetic gear with a low torque, high-speed PM generator to produce a compact low-speed, high torque machine with the advantages of a direct drive PM machine and magnetic gear. Although, previous low-speed PM generators designed with high number of poles and magnetic geared generators both eliminate the use of a mechanical gear, their power density capacity is low to generate sufficient electrical power for low-speed applications. The proposed magnetic geared generator with high power density due to the dual-iron ring is specifically aimed to address problems of low-power density in low-speed power generators. A magnetically coupled configuration structure is implemented in the generator design with dual-iron rings and three layers of mutual PMs. The proposed machine operates simultaneously as a magnetic gear and electrical power generator.
