Electromagnetic-force analysis of the magnetically levitated motor with two directions of movement

A magnetically levitated motor (MLM) with two directions of movement is presented in this paper. The thrust and the levitation force of the proposed motor can be achieved simultaneously by using only a single power source. Analytical equations for the operation principle of the proposed MLM are derived. Computer simulations of the MLM characteristics by using the finite-element-analysis method are also presented. The same trend can be found between analytical equations and computer-simulation results. Then, some experimental results are provided to confirm the theoretical analysis. All of the results can provide very useful information of mechanical-structure design and control scheme development for the MLM.

[1]  R.D. Lorenz,et al.  An integrated vehicle and electromagnetic propulsion unit for a high-speed material transport system , 1992, Conference Record of the 1992 IEEE Industry Applications Society Annual Meeting.

[2]  Yoon Keun Kwak,et al.  Wafer distribution system for a clean room using a novel magnetic suspension technique , 1998 .

[3]  M. Ono,et al.  Japan's superconducting Maglev train , 2002 .

[4]  Noriyuki Kimura,et al.  Simultaneous control of propulsion and levitation of linear induction motor in a novel Maglev system , 2000, Proceedings IPEMC 2000. Third International Power Electronics and Motion Control Conference (IEEE Cat. No.00EX435).

[5]  R. Sarunac.  "Low speed" magnetic levitation vehicle in the US , 1999, Proceedings of the 1999 ASME/IEEE Joint Railroad Conference (Cat. No.99CH36340).

[6]  King Jet Tseng,et al.  A disk-type bearingless motor for use as satellite momentum-reaction wheel , 2002, 2002 IEEE 33rd Annual IEEE Power Electronics Specialists Conference. Proceedings (Cat. No.02CH37289).

[7]  S. A. Sherif,et al.  Theoretical and experimental design of LIM in automated manufacturing systems , 1991 .

[8]  Sakutaro Nonaka,et al.  Design of single-sided linear induction motors for urban transit , 1988 .

[9]  Robert D. Lorenz,et al.  Analysis of competing topologies of linear induction machines for high speed material transport systems , 1993 .

[10]  V. Jung,et al.  Arrangement of permanent magnets in a levitation system with indifferent or weakly unstable characteristics , 1981 .

[11]  Y. Hirane,et al.  Control and characteristics of magnetically levitated system with linear induction motor , 1991, Conference Record of the 1991 IEEE Industry Applications Society Annual Meeting.

[12]  S. Kanda,et al.  A new MAGLEV system for magnetically levitated carrier system , 1989 .

[13]  He Yikang,et al.  Analytical model and feedback control of the levitation force for an induction-type bearingless motor , 2003, The Fifth International Conference on Power Electronics and Drive Systems, 2003. PEDS 2003..

[14]  Yan Lu-guang,et al.  Progress of high-speed Maglev in China , 2002 .

[15]  Denis F. Spicer,et al.  Precision X-Y positioning systems using linear induction motors , 1998 .

[16]  T. Fukao,et al.  The evolution of motor drive technologies. Development of bearingless motors , 2000, Proceedings IPEMC 2000. Third International Power Electronics and Motion Control Conference (IEEE Cat. No.00EX435).

[17]  Alexandre Brincalepe Campo,et al.  Design of a magnetic levitation and propulsion system with two degrees of freedom , 1998, Proceedings of the 1998 IEEE International Conference on Control Applications (Cat. No.98CH36104).

[18]  S. Kanda,et al.  A linear induction motor control system for magnetically levitated carrier system , 1989 .

[19]  K. Sawada.  Development of magnetically levitated high speed transport system in Japan , 1996 .