Iron loss investigation of miniaturized magnetic gears having solid cores

Iron loss and its consequence on the efficiency of magnetic gears determine the steel type of their cores. In miniaturized magnetic gears, solid steel is strongly preferred over the laminated one considering manufacturability. This paper investigates the iron losses of four miniaturized magnetic gears having different transmission ratios, intended for a same application. The iron loss distributions throughout the different magnetic gear cores are identified, for which it is demonstrated that their proportions vary with transmission ratios. In relation to that, recommendations on the use of a steel type are also given.