Design And Rotor Geometry Analysis Of Permanent Magnet–Assisted Synchronous Reluctance Machines Using Ferrite Magnet

Abstract Various electric machines can be the candidate for electric vehicles applications, including induction machines, permanent magnet synchronous machines, switched reluctance machines, etc. Another class of machine, which has been relatively ignored, is synchronous reluctance machines. In order to enhance and increase torque density of pure synchronous reluctance machines, the low cost permanent magnet can be inserted into rotor lamination to contribute torque production, which is so-called permanent magnet-assisted synchronous reluctance machines. This paper presents the design and rotor geometry analysis of low cost ferrite permanent magnet-assisted synchronous reluctance machines with transversally-laminated rotor. The advanced finite element method will be employed to calculate d-axis and q-axis inductance variation with rotor geometric parameters. The electromagnetic performance of optimized permanent magnet-assisted synchronous reluctance machines will be evaluated as well.

[1]  Shigeo Morimoto,et al.  Performance of PM assisted synchronous reluctance motor for high efficiency and wide constant power operation , 2000, Conference Record of the 2000 IEEE Industry Applications Conference. Thirty-Fifth IAS Annual Meeting and World Conference on Industrial Applications of Electrical Energy (Cat. No.00CH37129).

[2]  D. Howe,et al.  Analytical prediction of the cogging torque in radial-field permanent magnet brushless motors , 1992 .

[3]  Zi-Qiang Zhu,et al.  Electrical Machines and Drives for Electric, Hybrid, and Fuel Cell Vehicles , 2007, Proceedings of the IEEE.

[4]  Massimo Barcaro,et al.  Permanent-Magnet Optimization in Permanent-Magnet-Assisted Synchronous Reluctance Motor for a Wide Constant-Power Speed Range , 2012, IEEE Transactions on Industrial Electronics.

[5]  G. Slemon,et al.  Reduction of cogging torque in permanent magnet motors , 1988 .

[6]  Z.Q. Zhu,et al.  Reduction of cogging torque in interior-magnet brushless machines , 2003, Digest of INTERMAG 2003. International Magnetics Conference (Cat. No.03CH37401).

[7]  Thomas A. Lipo,et al.  Rotor design optimization of synchronous reluctance machine , 1994 .

[8]  Nicola Bianchi,et al.  Design techniques for reducing the cogging torque in surface-mounted PM motors , 2000, Conference Record of the 2000 IEEE Industry Applications Conference. Thirty-Fifth IAS Annual Meeting and World Conference on Industrial Applications of Electrical Energy (Cat. No.00CH37129).

[9]  Timothy J. E. Miller,et al.  Maximising the saliency ratio of the synchronous reluctance motor , 1993 .

[10]  Gan Zhang,et al.  A Novel Hybrid Excitation Flux-Switching Motor for Hybrid Vehicles , 2009, IEEE Transactions on Magnetics.

[11]  Thomas M. Jahns,et al.  Interior Permanent-Magnet Synchronous Motors for Adjustable-Speed Drives , 1986, IEEE Transactions on Industry Applications.

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

[13]  H.A. Toliyat,et al.  A low-cost and efficient permanent magnet assisted synchronous reluctance motor drive , 2007, IEEE International Conference on Electric Machines and Drives, 2005..