Characteristics comparison of a conventional and modified spoke-type ferrite magnet motor for traction drives of low-speed electric vehicles

Rare-earth magnets have been widely employed for traction drive motors of hybrid and electric vehicles (EVs) due to high energy density. Nevertheless, the magnets have critical problems such as unstable supply and high cost. Recently, in order to solve the problems, a variety of motors not using rare-earth materials have been reviewed such as an induction motor, a switched reluctance motor, and a spoke-type ferrite magnet motor (FMM). In this paper, a modified spoke-type FMM with a novel rotor configuration is presented for a traction motor of low-speed EVs. The characteristics of the modified spoke-type FMM are numerically compared with a conventional spoke-type FMM at the same design condition. Finally, the modified spoke-type FMM is fabricated and tested in order to verify its performance and feasibility.

[1]  David G. Dorrell,et al.  Analysis and Design Techniques Applied to Hybrid Vehicle Drive Machines—Assessment of Alternative IPM and Induction Motor Topologies , 2012, IEEE Transactions on Industrial Electronics.

[2]  Jung-Pyo Hong,et al.  Modeling of coreloss resistance for d-q equivalent circuit analysis of IPMSM considering harmonic linkage flux , 2010, Digests of the 2010 14th Biennial IEEE Conference on Electromagnetic Field Computation.

[3]  T.M. Jahns,et al.  Optimal flux weakening in surface PM machines using fractional-slot concentrated windings , 2005, IEEE Transactions on Industry Applications.

[4]  Tomonobu Senjyu,et al.  A novel calculation method for iron loss resistance suitable in modeling permanent-magnet synchronous motors , 2002 .

[5]  S. Ogasawara,et al.  Torque Density and Efficiency Improvements of a Switched Reluctance Motor Without Rare-Earth Material for Hybrid Vehicles , 2011, IEEE Transactions on Industry Applications.

[6]  Kay Hameyer,et al.  Study and comparison of several permanent-magnet excited rotor types regarding their applicability in electric vehicles , 2010, 2010 Emobility - Electrical Power Train.

[7]  Jung-Pyo Hong,et al.  Optimization Technique for Improving Torque Performance of Concentrated Winding Interior PM Synchronous Motor with Wide Speed Range , 2006, Conference Record of the 2006 IEEE Industry Applications Conference Forty-First IAS Annual Meeting.

[8]  T. Senjyu,et al.  A Novel Calculation Method for Iron Loss Resistance Suitable in Modeling Permanent Magnet Synchronous Motors , 2002, IEEE Power Engineering Review.

[9]  Gianmario Pellegrino,et al.  Performance Comparison Between Surface-Mounted and Interior PM Motor Drives for Electric Vehicle Application , 2012, IEEE Transactions on Industrial Electronics.

[10]  M. Hsieh,et al.  Alternative Rotor Designs for High Performance Brushless Permanent Magnet Machines for Hybrid Electric Vehicles , 2012, IEEE Transactions on Magnetics.

[11]  Nesimi Ertugrul,et al.  Field-weakening performance of interior permanent-magnet motors , 2000 .

[12]  Shigeo Morimoto,et al.  Performance evaluation of a high power density PMASynRM with ferrite magnets , 2011 .

[13]  Geun-Ho Lee,et al.  Modeling of Core Loss Resistance for $d\hbox{-}q$ Equivalent Circuit Analysis of IPMSM considering Harmonic Linkage Flux , 2011, IEEE Transactions on Magnetics.

[14]  Gyu-Hong Kang,et al.  Optimal design of spoke type BLDC motor considering irreversible demagnetization of permanent magnet , 2003, Sixth International Conference on Electrical Machines and Systems, 2003. ICEMS 2003..

[15]  R. H. Staunton.  PM Motor Parametric Design Analyses for a Hybrid Electric Vehicle Traction Drive Application , 2004 .

[16]  K. Hameyer,et al.  Comparison and design of different electrical machine types regarding their applicability in hybrid electrical vehicles , 2008, 2008 18th International Conference on Electrical Machines.