Cogging torque reduction in flux-switching permanent magnet machines by rotor pole shaping

Cogging torque in flux-switching permanent magnet machines (FSPMs) is relatively high compared with other types of PM machines because of their unique doubly salient structure. Reducing the cogging torque in the FSPM machine is of particular importance to make it a viable alternative to conventional rotor-PM machines. A new pole shaping method has been proposed to reduce the cogging torque. The validity of the proposed method has been confirmed by analytical methods and finite element analysis based simulation. The influence of the proposed pole shaping method on the back-EMF and average electromagnetic torque have also been investigated.

[1]  D. Howe,et al.  Optimal combination of stator and rotor pole numbers in flux-switching PM brushless AC machines , 2008, 2008 International Conference on Electrical Machines and Systems.

[2]  Hongyun Jia,et al.  Torque Ripple Suppression in Flux-Switching PM Motor by Harmonic Current Injection Based on Voltage Space-Vector Modulation , 2010, IEEE Transactions on Magnetics.

[3]  R. Deodhar,et al.  Comparison of losses and efficiency in alternate flux-switching permanent magnet machines , 2010, The XIX International Conference on Electrical Machines - ICEM 2010.

[4]  Wei Hua,et al.  Cogging torque reduction of flux-switching permanent magnet machines without skewing , 2008, 2008 International Conference on Electrical Machines and Systems.

[5]  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).

[6]  Sang-Yong Jung,et al.  Reduction on Cogging Torque in Flux-Switching Permanent Magnet Machine by Teeth Notching Schemes , 2012, IEEE Transactions on Magnetics.

[7]  D. Howe,et al.  Influence of design parameters on output torque of flux-switching permanent magnet machines , 2008, 2008 IEEE Vehicle Power and Propulsion Conference.

[8]  D. Howe,et al.  Analysis of electromagnetic performance of flux-switching permanent-magnet Machines by nonlinear adaptive lumped parameter magnetic circuit model , 2005, IEEE Transactions on Magnetics.

[9]  Hongyun Jia,et al.  Comparative Study of Flux-Switching and Doubly-Salient PM Machines Particularly on Torque Capability , 2008, 2008 IEEE Industry Applications Society Annual Meeting.

[10]  Chris Gerada,et al.  Design Considerations for a Fault-Tolerant Flux-Switching Permanent-Magnet Machine , 2011, IEEE Transactions on Industrial Electronics.

[11]  Jian-Xin Shen,et al.  Cogging torque suppression in a permanentmagnet flux-switching integrated-starter-generator , 2010 .

[12]  D. Howe,et al.  Analysis and Optimization of Back-EMF Waveform of a Novel Flux-Switching Permanent Magnet Motor , 2007, 2007 IEEE International Electric Machines & Drives Conference.

[13]  R. Deodhar,et al.  A novel E-core flux-switching PM brushless AC machine , 2010, 2010 IEEE Energy Conversion Congress and Exposition.

[14]  Min-Fu Hsieh,et al.  Different Arrangements for Dual-Rotor Dual-Output Radial-Flux Motors , 2010, IEEE Transactions on Industry Applications.

[15]  Min-Fu Hsieh,et al.  Cogging torque reduction in axial flux machines for small wind turbines , 2009, 2009 35th Annual Conference of IEEE Industrial Electronics.

[16]  Sang-Yong Jung,et al.  Reducing Cogging Torque in Surface-Mounted Permanent-Magnet Motors by Nonuniformly Distributed Teeth Method , 2011, IEEE Transactions on Magnetics.

[17]  Guohai Liu,et al.  Design of Five-Phase Modular Flux-Switching Permanent-Magnet Machines for High Reliability Applications , 2013, IEEE Transactions on Magnetics.

[18]  Jian-Xin Shen,et al.  Cogging torque reduction in permanent magnet flux-switching machines by rotor teeth axial pairing , 2010 .