Evaluation of a prototype magnetic gear

In this paper, the design of a prototype concentric-type magnetic gear is evaluated. The effects that the mechanical bridges connecting the modulator segments have on the performance of the gear have been analyzed by using detailed two-dimensional (2D) finite element (FE) analysis. The magnetic gear suffers significantly from end-effects, which result in a considerable decrease in the peak torque capability as well as excessive losses under high-speed operation. Three-dimensional (3D) FE analysis is employed to identify the origin of the undesired end-effects and to determine which structural components have the greatest negative impact. Insight is then gained into how the prototype could be modified to reduce these end-effects.