A design approach to coaxial magnetic gear and determination of torque capability

This paper presents a time-saving methodology for the design and sizing of the magnetic gear sets. Some new design parameters similar to mechanical gears were dened to calculate the torque capacity. Finite-element analysis was extensively used to calculate the variation of torque capacity of gear set due to changes in dierent geometric parameters of a set. Dierent design curves were obtained by which the design and sizing of the gears can routinely be accomplished. Optimal performance of magnetic gear was not the main target of this research, and utilization of this method helps gear designers to decide on parameters, such as scale of gears, magnet thickness, stack length, and pole pair numbers, and come up with a near-optimum geometry design