Institute of Electrical and Electronic Engineers (IEEE)
2019 IEEE International Electric Machines & Drives Conference (IEMDC)
Two major challenges of existing high-performance magnetic gears are: (i) High content of rare-earth permanent magnets which results in high cost as well as price fluctuation; (ii) Conflict between mechanical and electromagnetic performances, especially in the design of highspeed rotor. A magnetic gear using a blend of magnet types, i.e NdFeB, or Dy-free NdFeB and ferrites, is proposed in this paper. The goal is to bring down the cost while retaining comparable torque-transducing performance to a baseline magnetic gear only using rare-earth NdFeB magnets. A variety of topologies based on different combinations of magnet types and geometric shapes have been studied and compared. In addition, the potential impact of using an advanced dual-phase material is evaluated. The goal is to eliminate the well-known tradeoff between rotor mechanical integrity and PM flux leakage.
Al-Qarni, Ali Hussain; Wu, Fan; and EL-Refaie, Ayman M., "High-Torque-Density Low-Cost Magnetic Gear Utilizing Hybrid Magnets and Advanced Materials" (2019). Electrical and Computer Engineering Faculty Research and Publications. 600.
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