Tutorial Session

Tutorial 01 - High Performance Linear Induction Machines and Drive Systems

Tutorial 01 - High Performance Linear Induction Machines and Drive Systems


Wei Xu, School of Electrical and Electronics Engineering, Huazhong University of Science and Technology (HUST), China


The main subject of the tutorial is linear induction motors (LIMs). Starting from a brief structural description of such motors, their main applications will be exposed in the tutorial with specific reference to MAGLEV (Magnetically Levitation) vehicles, urban people movers (such as linear metro, light railway, etc.), launchers, actuators for industry and automotive, etc. As a first step, the main differences between rotating and linear induction motors will be highlighted, focusing on the aspects of static and dynamic end effects as well as transversal edge effects. The typical structure of LIMs will be treated, with specific reference to secondary sheet and primary winding configurations.

Single-sided LIMs (S-LIMs) and Double-sided ones (D-LIMs) will be described in detail, focusing on normal force effects. Design criteria of LIMs will be specifically exposed, emphasizing the main differences with the classic rotating induction motor design, caused by the presence of large air-gaps, high leakage inductances as well as the end effects. Both static and dynamic models of LIMs will be introduced, including the so-called end-effects, magnetic saturation, non-linear traits influenced by PWM modulation, and so on. Suitable parameter estimation methods will be then described. Afterwards, control techniques specifically devised for LIMs, like field-oriented control, input-output feedback linearization control, active disturbance rejection control, model predictive control, efficiency optimization control, etc., will be introduced in detail. Finally, sensorless techniques with strong robustness capability specifically developed for LIMs will be shown.


Click here to download the tutorial agenda.

Bio of the organizers

Prof. Wei Xu received the double B.E. degree from Tianjin University (TJU), China, in July 2002, and M.E. degree from TJU in March 2005, and the Ph.D. degree from Institute of Electrical Engineering, Chinese Academy of Sciences (IEECAS), in July 2008, respectively, all in electrical engineering. His research interests His research topics mainly focus on electromagnetic design and control algorithm of linear machines and drive systems.

From 2008 to 2012, he made Postdoctoral Fellow with University of Technology Sydney, Vice Chancellor Research Fellow with Royal Melbourne Institute of Technology, Japan Science Promotion Society Invitation Fellow with Meiji University, respectively. Since 2013, he has been Full Professor with State Key Laboratory of Advanced Electromagnetic Engineering in Huazhong University of Science and Technology, China.

Prof. Xu has been one IEEE Senior Member since 2013, and one Fellow of the Institute of Engineering and Technology (IET) since 2018. Since 2014, Prof. Xu has been invited to make more than ten-time Keynote Speaking in International Conferences. Meanwhile, as one Guest Editor, Prof. Xu has been invited to organize more than ten-time Special Issues in peer review high-quality Journals, such as IEEE Transactions on Industrial Electronics. As the principle speaker, he has been invited to given five-time Tutorial about Linear Machines and Drive Systems in IEEE leading conferences, including IEEE Industrial Electronics Conference (IECON, Oct. 2018), IEEE International Conference Electrical Machines and Systems (ICEMS, Aug. 2018), International Conference on Electrical Machines (ICEM, Aug. 2020), respectively.

Prof. Xu served the General Chair for 2021 International Symposium on Linear Drives for Industry Applications (LDIA 2021) in Wuhan, China, and will serve the General Chair for 2023 IEEE International Conference on Predictive Control of Electrical Drives and Power Electronics (PRECEDE 2023) in Wuhan, China. He has been the Founding Chair for IEEE IES Wuhan Chapter since 2018. He has also been the International Steering Committee (ISC) Member for linear machines and drives. Meanwhile, Prof. Xu has been Associate Editor for several leading IEEE Transactions Journals, such as IEEE Transactions on Industrial Electronics, IEEE Transactions on Vehicular Technology, IEEE Transactions on Energy Conversion, and so on.

Prof. Xu is now leading one research group, Center for Energy Conversion System (CECS, http://machinececs.seee.hust.edu.cn/), including 6 staff and over 40 PhD/ME students, for the development on high performance of electrical machines (particularly linear machines) and drive systems based on transportation, wind generation, servo, etc. He has more than 110 papers accepted or published in IEEE Journals, two edited books published by Springer Press, one monograph published by China Machine Press, and more than 150 Invention Patents granted or in pending, all in the related fields of electrical machines and drives.