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Third Harmonic Utilization in Permanent Magnet Machines by Kai Wang

Third Harmonic Utilization in Permanent Magnet Machines

by Kai Wang
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Book cover type: Hardcover
  • ISBN13: 9789811306280
  • Binding: Hardcover
  • Subject: N/A
  • Publisher: Springer
  • Publisher Imprint: Springer
  • Publication Date:
  • Pages: 211
  • Original Price: EUR 99.99
  • Language: English
  • Edition: 2019
  • Item Weight: 490 grams
  • BISAC Subject(s): Machinery, Manufacturing, and Electrical

From the Back Cover
This book investigates the utilization of harmonics in the permanent magnet (PM) or rotor shape to improve the torque density of PM brushless AC machines including three-phase inner rotor and outer rotor machines, five-phase machines, dual three-phase machines, linear machines, by means of analytical, finite element analyses, and as well as experimental validation.
The torque density can be improved while the torque ripple remains low in PM shaping utilizing the 3rd harmonic. In this book, the analytical expression of output torque is derived for PM machines with rotor shape using the 3rd harmonic, and then the optimal 3rd harmonic for maximizing torque is analytically obtained.
The book compares the PM shape in surface-mounted PM (SPM) machines and the rotor lamination shape in interior PM (IPM) machines utilizing the 3rd harmonic, and it becomes clear that their shaping methods and amount of torque improvement are different.
In a five-phase PM machine, the 3rd harmonic can be utilized in both the current waveform and PM shapes to further improve the output torque. For the dual three-phase SPM machines without deteriorating the torque more than 30% when the optimal 3rd harmonic into both the current and PM shape are injected.

The harmonics in airgap flux density have significant influence on the cogging torque, stator iron flux distribution, and radial force between the rotor and stator. These effects has been investigated as well in this book.

For internal use only: Professional Experience 2015-present Professor, Phd supervisor Nanjing University of Aeronautics and Astronautics 2014-2015 Research and Development Engineer, Ansys Inc., PA, USA 2013-2014 Research associate Siemens Sheffield University Wind Power Research Centre, UK 2010-2013 Research associate, Sheffield University, UK 2009-2010 Post-doctoral researcher, Memorial University, Newfoundland, CanadaEDUCATION 2010-2013 Ph.D in Electrical Engineering, Sheffield University, UK 2004-2009 Ph.D in Electrical Engineering, Zhejiang University, Hangzhou, China. 2000-2004 B.S. in Automation, China Jiliang University, Hangzhou, ChinaEXPERIENC 2014-2015 Co-simulation between Maxwell and Matlab 2013-2014 PM machine design for wind power 2010-2013 PM machine design for high performance EPS applicationsDemonstrator for the undergraduate student in Sheffield University 2009-2010 High efficiency line-start PM motor design and IPM generator design for wind power 2007-2009 Inverter and DSP controller for high speed sensorless control systems. Technical support of MagneForce motor design software 2007.7-2007.9 Internship position of PM motor design in TECO 2006-2007 Optimization and development of high-speed sensorless permanent magnet motors 2005-2006 Finite element analysis of three-dimension artificial heart pump motor PM machine design for high performance EPS applications Serial DC motor design for electrical machine tools (Bosch Company) 2004-2005 Optimization design of high speed generator for micro-gas turbine
AWARDS AND ORGANIZATION 2014-present IEEE Senior member 2012 Best paper awards in international conference and exhibition on ecological vehicles and renewable energy 2009-2010 Excellent plan for Ph.D thesis of Zhejiang Univeristy Excellent graduate student of Zhejiang University 2007-2008 First-Class Scholarship for Excellent Student of Zhejiang University "TECO" Enterprise Scholarship of Zhejiang University "MPS" Enterprise Scholarship of Zhejiang University "Wang Guosong" Scholarship of Zhejiang University Award of Excellent Leadership of Graduate Student of ZhejiangUniversity Award for paper published on Journal of Applied Physics 2000-2004 Excellent Graduate Student of China Jiliang University First-Class Scholarship for Excellent Student of China Jiliang University (4 times)

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