Performance Improvement of Coaxial Magnetic Gear with Asymmetric Rotor Structure

This paper presents an optimal asymmetric permanent magnet (PM) aligning and rotor pole shaping topology in a coaxial magnetic gear (CMG) to mitigate cogging torque and augment torque density. Proposed design is based on using asymmetric interior PM placement and applying oval structure on high-speed rotor’s surface. The suggested magnetic gear consists of 12 outer and 3 inner pole pairs. The targeted goals are accomplished by implementing the recommendations, according to the results. Finite element analysis results evaluate and verifies the topological performance.