This paper investigates the performance capabilities of a continuously variable magnetic gearbox that utilizes a flux focusing rotor structure. A fractional slot stator winding is designed to couple to the outer rotor of an existing magnetic gearbox in order to enable the magnetic gearbox to operate with a variable gear ratio.
Pritchard, J.; Padmanathan, Pavithra; and Bird, Jonathan Z., "Designing a Continuously Variable Magnetic Gear" (2016). Electrical and Computer Engineering Faculty Publications and Presentations. 389.