中国电气工程学报（英文） ›› 2021, Vol. 7 ›› Issue (3): 20-28.doi: 10.23919/CJEE.2021.000022

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  • 收稿日期:2021-03-12 修回日期:2021-04-06 接受日期:2021-05-31 出版日期:2021-09-25 发布日期:2021-09-17

Influence of Rotor Iron Bridge Position on DC-winding-induced Voltage in Wound Field Switched Flux Machine Having Partitioned Stators

Zhongze Wu1,*, Z. Q. Zhu2, Chao Wang2, Wei Hua1, Kai Wang3, Wentao Zhang1   

  1. 1. School of Electrical Engineering, Southeast University, Nanjing 210096, China;
    2. Department of Electronic and Electrical Engineering, University of Sheffield, Sheffield S10 2TN, UK;
    3. College of Automation, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China
  • Received:2021-03-12 Revised:2021-04-06 Accepted:2021-05-31 Online:2021-09-25 Published:2021-09-17
  • Contact: * E-mail: zzwu@seu.edu.cn
  • About author:Zhongze Wu (S’15-M’18) received the B.Eng. and M.Sc. degrees in Electrical Engineering from Southeast University, Nanjing, China, in 2010 and 2013, respectively, and the Ph.D. degree in Electrical and Electronic Engineering from The University of Sheffield, Sheffield, UK, in January 2017.Since March 2021, he has been with School of Electrical Engineering, Southeast University, Nanjing, China, as a Researcher. His major research interests include the advanced electrical machines and drives for electric propulsion systems.From January 2017 to August 2018, he was with Warwick Manufacturing Group (WMG), University of Warwick, Coventry, UK, as a Research Fellow in electrical machines. From August 2018 to August 2020, he was with the Institute for Advanced Automotive Propulsion Systems (IAAPS), Department of Mechanical Engineering, University of Bath, Bath, UK, as a Prize Fellow, where he was a Lecturer between August 2020 and January 2021.
    Z. Q. Zhu (M’90-SM’00-F’09) received the B.Eng. and M.Sc. degrees in Electrical and Electronic Engineering from Zhejiang University, Hangzhou, China, in 1982 and 1984, respectively, and the Ph.D. degree in Electrical and Electronic Engineering from The University of Sheffield, Sheffield, UK, in 1991.Since 1988, he has been with The University of Sheffield, where he is currently a Research Chair of the Royal Academy of Engineering/Siemens with the Department of Electronic and Electrical Engineering and the Head of the Electrical Machines and Drives Research Group. His current research interests include the design and control of permanent-magnet brushless machines and drives for applications ranging from automotive through domestic appliances to renewable energy.Dr. Zhu is a Fellow of the Royal Academy of Engineering.
    Chao Wang received the B.Eng. and M.Sc. degrees in Electrical Engineering from Hefei University of Technology, Hefei, China, in 2008 and 2011, respectively, and the Ph.D. degree in Electronic and Electrical Engineering from The University of Sheffield, Sheffield, UK, in 2019.Since 2019, he has been with Midea Welling Motor Technology Company, Ltd., Shanghai, China, as an Advanced Research Engineer, where he was an Engineer from 2011 to 2015. His research interests include the control of electric drives.
    Wei Hua (M’03-SM’16) received the B.Sc. and Ph.D. degrees in Electrical Engineering from Southeast University, Nanjing, China, in 2001 and 2007, respectively. From 2004 to 2005, he was with the Department of Electronics and Electrical Engineering, The University of Sheffield, UK, as a Joint- Supervised Ph.D. Student. Since 2007, he has been with Southeast University, where he is currently a Chief Professor of Southeast University and a Distinguished Professor of Jiangsu Province. From 2010, he has also worked with Yancheng Institute of New Energy Vehicles of Southeast University. He has co-authored over 150 technical papers. He holds 50 patents in his areas of interest. His teaching and research interests include design, analysis, and control of electrical machines, especially for PM brushless machines and switching reluctance machines, etc.
    Kai Wang (M’13-SM’14) received the B.Eng. degree from China Jiliang University, Hangzhou, China, in 2004 and the Ph.D. degree from Zhejiang University, Hangzhou, China, in 2009.From 2009 to 2010, he was with the Memorial University of Newfoundland, St. John’s, NL, Canada, as a Postdoctoral Fellow. From 2010 to 2013, he was with The University of Sheffield, Sheffield, U.K. From 2013 to 2015, he was a Research Associate with the Sheffield Siemens Wind Power Research Centre, Sheffield, U.K., and a Research and Development Engineer with Ansys Inc., Canonsburg, PA, USA. Since 2015, he has been with the College of Automation Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, China. His current research interests include the design and control of permanent-magnet machines.
    Wentao Zhang was born in Suzhou, China, in 1995. He received the B.Eng. degree in Electrical Engineering and Its Automation in July 2018 from Southeast University, Nanjing, China, where he has been working toward the M.Sc. degree since September 2018.His major research interests include the design, analysis, and control of the wound field switched flux machines.

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Abstract: In this study, the influence of the position of the rotor iron bridge on the DC-winding-induced voltage pulsation in a partitioned stator wound field switched flux machine is investigated. Analytical and finite element (FE) analyses show that both the open-circuit and on-load DC-winding-induced voltages can be minimized by positioning the rotor iron bridge adjacent to the inner air gap closer to the DC winding. This is due to a smoother inner air-gap magnetic reluctance while maintaining the average electromagnetic torque at 92.59% of the maximum value. The analyzed machine with the rotor iron bridge adjacent to the inner air gap is prototyped, and the experimental results validate the analytical and FE results.

Key words: DC winding induced voltage, flux switching, iron bridge, partitioned stator, switched flux, wound field