Cost-Effectiveness Comparison of Coaxial Magnetic Gears With Different Magnet Materials

This paper presents a comparative study between the nonrare-earth PM and rare-earth PM-based coaxial magnetic gears. First, using finite-element analysis, the electromagnetic performances of four coaxial magnetic gears, which are installed with nonrare- or rare-earth PMs, are analyzed and quantitatively compared based on the same structure. Then, the natural magnetic properties of nonrare- and rare-earth PMs are evaluated and discussed. Finally, the cost effectiveness of coaxial magnetic gears adopting different types of PMs is assessed. The results show that the nonrare-earth PMs, especially the aluminum-nickel-cobalt, are preferred for application to coaxial magnetic gears with emphasis on the cost effectiveness.

[1]  Chunhua Liu,et al.  Design of a Magnetic-Geared Outer-Rotor Permanent-Magnet Brushless Motor for Electric Vehicles , 2007, IEEE Transactions on Magnetics.

[2]  P.O. Rasmussen,et al.  Development of a high-performance magnetic gear , 2003, IEEE Transactions on Industry Applications.

[3]  A Rezzoug,et al.  Comparative Study Between Mechanical and Magnetic Planetary Gears , 2011, IEEE Transactions on Magnetics.

[4]  Chuang Yu,et al.  Design, Analysis, and Control of DC-Excited Memory Motors , 2011, IEEE Transactions on Energy Conversion.

[5]  K. Atallah,et al.  A novel high-performance magnetic gear , 2001 .

[6]  Mi-Ching Tsai,et al.  Development of a Magnetic Planetary Gearbox , 2008, IEEE Transactions on Magnetics.

[7]  K. T. Chau,et al.  Design and analysis of interior-magnet outer-rotor concentric magnetic gears , 2009 .

[8]  Smail Mezani,et al.  Analytical Computation of the Magnetic Field Distribution in a Magnetic Gear , 2010, IEEE Transactions on Magnetics.

[9]  Wenlong Li,et al.  Application of Linear Magnetic Gears for Pseudo-Direct-Drive Oceanic Wave Energy Harvesting , 2011, IEEE Transactions on Magnetics.

[10]  Zhen Zhang,et al.  Novel Design of Double-Stator Single-Rotor Magnetic-Geared Machines , 2012, IEEE Transactions on Magnetics.

[11]  K.T. Chau,et al.  A Magnetic-Geared Outer-Rotor Permanent-Magnet Brushless Machine for Wind Power Generation , 2007, 2007 IEEE Industry Applications Annual Meeting.

[12]  K. T. Chau,et al.  COMPARISON OF MAGNETIC-GEARED PERMANENT- MAGNET MACHINES , 2013 .