中国电气工程学报（英文） ›› 2020, Vol. 6 ›› Issue (1): 41-51.doi: 10.23919/CJEE.2020.000003

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  • 出版日期:2020-03-25 发布日期:2020-04-09

Design Optimization and Comparison of Linear Magnetic Actuators under Different Topologies*

Zhijian Ling1, Jinghua Ji1, Tao Zeng2, Wenxiang Zhao1,*   

  1. 1. School of Electrical and Information Engineering, Jiangsu University, Zhenjiang 212013, China;
    2. Nanjin Canneng Electric Power Automation Co., Ltd., Nanjing 211199, China
  • Online:2020-03-25 Published:2020-04-09
  • Contact: *Email: zwx@ujs.edu.cn
  • About author:Zhijian Ling (S’16) received his B.S. in Electrical Engineering and Automation from Shandong Agriculture University, Taian, China, in 2013, and his M.S. in Electrical Engineering from Jiangsu University, Zhenjiang, China, in 2016, where he is currently working towards his Ph.D. From September 2018 to August 2019, he was a joint Ph.D. student funded by the Department of Energy Technology, Aalborg University, Aalborg, Denmark.His research interests include the design and analysis of permanent magnet electrical machines and magnetic actuators.
    Jinghua Ji received her B.S., M.S., and Ph.D. in Electrical Engineering from Jiangsu University, Zhenjiang, China, in 2000, 2003, and 2009, respectively. Since 2000, she has been with the School of Electrical and Information Engineering, Jiangsu University, where she serves as a Professor. From 2013 to 2014, she was a Visiting Scholar with the Department of Electronic and Electrical Engineering, University of Sheffield, Sheffield, UK. Her areas of interest include motor design and electromagnetic field computation and has authored and co-authored over 100 technical papers in these areas.
    Tao Zeng received his B.S. in Electrical Engineering from Nanjing Institute of Technology, Nanjing, China, in 2016. Since 2016, he has been with the Nanjing Canneng Electric Power Automation Co., Ltd., where he serves as a Marketing Manager.
    Wenxiang Zhao (M’08-SM’14) received his B.S. and M.S. from Jiangsu University, Zhenjiang, China, in 1999 and 2003, respectively, and Ph.D. from Southeast University, Nanjing, China, in 2010, all in Electrical Engineering. He has been with Jiangsu University since 2003, where he is currently a Professor with the School of Electrical Information Engineering.From 2008 to 2009, he was a Research Assistant with the Department of Electrical and Electronic Engineering, University of Hong Kong, Hong Kong, China. From 2013 to 2014, he was a Visiting Professor with the Department of Electronic and Electrical Engineering, University of Sheffield, Sheffield, UK. His current research interests include electric machine design, modeling, fault analysis, and intelligent control and has authored and co-authored over 250 technical papers in these areas.
  • Supported by:
    * Supported by National Natural Science Foundation of China (51977099, 51777090), Key Research and Development Program of Jiangsu Province (BE2018107), and Six Talent Peaks Project of Jiangsu Province (2017-KTHY-011).

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Abstract: In this study, several types of linear actuators that adopt different permanent-magnet (PM) topologies are studied and compared. These linear actuators are based on the concept of PM magnetic screw transmission, which offers high force density, high reliability, and overload protection. Using different magnetic configurations and assembly methods, these linear actuators are designed and optimized for a fair comparison. Initially, based on the operating principle and maximum thrust force, the surface-mounted magnetic screw is described and optimized. Furthermore, the embedded magnetic screw, Halbach array magnetic screw, and field modulated magnetic screw are investigated and compared. Their electromagnetic performances, such as thrust force, torque, magnetic losses, and demagnetization effects are analytically assessed and verified using finite-element analysis. Finally, a prototype of the surface-mounted magnetic screw is developed to validate the predictions.

Key words: Linear actuator, magnetic screw, high force, permanent magnet, finite-element analysis