A New Hybrid Y-Type Rotor Topology for High-Performance Coaxial Magnetic Gear

In recent years, along with unprecedented development in magnetic gears (MGs), numerous novel designs have been proposed because of their contactless characteristic, low noise, and vibration. However, the expense of using magnetic gears may be a deterrent in small-scale industrial applications. The extensive usage of pricey neodymium or samarium cobalt magnets is the main reason why magnetic gears cost high. In low-frequency applications, ferrite permanent magnets present minimal eddy current losses and are affordable and widely accessible since ferrite, compared to the most modern magnets, has a substantially lower energy (BH<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">max</inf>). Using two different kinds of magnets at the same time is an effective technique to obtain high energy and to reduce costs. This paper presents the analysis of a coaxial magnetic gear that simultaneously employs rare-earth and ferrite magnets in its structure. The proposed structure is optimized by ANSYS Maxwell 2021-R1 finite element software and genetic algorithm.