A Novel Magnetic Gear: Toward a Higher Torque Density

Magnetic gears (MGs), a promising alternative to conventional mechanical gear boxes, have gained growing attention in the last decade. This paper proposes a novel topology of flux-focusing MG, which makes use of both axial and transverse magnetic fluxes. Important geometrical parameters are optimized using a sequential parametric sweeping analysis. Performances are validated by a 3-D finite-element method and compared with the existing MGs. The result indicates that by reducing the saturation in soft magnetic materials and the flux leakage, the new topology has a significantly high torque density within a wide length-diameter ratio.