Design and Experimental Analysis for Reduction of Cogging Torque by Pole Shifting in Permanent Magnet Synchronous Generator

This paper presents an application of the pole shifting technique used for reducing the cogging torque of permanent magnet synchronous generators (PMSGs) that employs in micro wind turbines (MWTs). The effectiveness of the pole shifting technique on the cogging torque reduction of the PMSG has been tested by the cogging torque measurement system that has been connected with a MWT. In order to evaluate the performance of the proposed technique, two internal rotors for the PMSG on the measurement system, namely internal rotor with the pole shifting and internal rotor without the pole shifting, have been designed and fabricated. The measurement results and analyses have showed that the PMSG with the pole shifting has a very low cogging torque when comparing to the PMSG without the pole shifting. DOI: http://dx.doi.org/10.5755/j01.eee.20.8.8438

[1]  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).

[2]  Ciprian Nemes,et al.  Statistical Analysis of Wind Turbine’s Output Power , 2012 .

[3]  B. J. Chalmers,et al.  Influence of machine symmetry on reduction of cogging torque in permanent-magnet brushless motors , 2000 .

[4]  E. Lorenzani,et al.  Review of Design Solutions for Internal Permanent-Magnet Machines Cogging Torque Reduction , 2012, IEEE Transactions on Magnetics.

[5]  Chang Seop Koh,et al.  New cogging-torque reduction method for brushless permanent-magnet motors , 2003 .

[6]  G. Kang,et al.  A Novel Cogging Torque Reduction Method for Interior Type Permanent Magnet Motor , 2007, 2007 IEEE Industry Applications Annual Meeting.

[7]  I. Husain,et al.  Permanent Magnet Synchronous Motor Magnet Designs with Skewing for Torque Ripple and Cogging Torque Reduction , 2007 .

[8]  I. Tarımer,et al.  Designing of a Permanent Magnet and Directly Driven Synchronous Generator for Low Speed Turbines , 2011 .

[9]  S. O. Ani,et al.  Comparison of Energy Yield of Small Wind Turbines in Low Wind Speed Areas , 2013, IEEE Transactions on Sustainable Energy.

[10]  Nikolaj Levin,et al.  Methods to Reduce the Cogging Torque in Permanent Magnet Synchronous Machines , 2013 .

[11]  P. Pillay,et al.  Cogging Torque Reduction in Permanent Magnet Machines , 2006, IEEE Transactions on Industry Applications.

[12]  C. Marchand,et al.  PMSM cogging torque reduction: Comparison between different shapes of magnet , 2012, 2012 First International Conference on Renewable Energies and Vehicular Technology.

[13]  Yubo Yang,et al.  Optimization of Magnetic Pole Shifting to Reduce Cogging Torque in Solid-Rotor Permanent-Magnet Synchronous Motors , 2010, IEEE Transactions on Magnetics.

[14]  Karim Abbaszadeh,et al.  Cogging torque optimization in surface-mounted permanent-magnet motors by using design of experiment , 2011 .

[15]  Shoudao Huang,et al.  A method for reducing cogging torque by magnet shifting in permanent magnet machines , 2010, 2010 International Conference on Electrical Machines and Systems.

[16]  I. Tarımer,et al.  Performance Comparision of Internal and External Rotor Structured Wind Generators Mounted from Same Permanent Magnets on Same Geometry , 2009 .

[17]  Hayati Mamur,et al.  Design, application, and power performance analyses of a micro wind turbine , 2015 .