A 3-D Analytical Model for a Double Halbach Linear Array Electrodynamic Suspension System
2015 IEEE International Magnetics Conference (INTERMAG)
By translationally moving a magnetic source above a conductive plate guideway both levitation and drag forces are created. Unfortunately, the electrodynamic drag force can be quite high . Kratz studied a double Halbach array topology, such as shown in Fig 1 , and used a simple curve fitting approximation to model the forces. Kratz experimentally showed that a significant reduction in drag force can be created when using this “null current” approach. Much earlier Urankar derived analytic equations for a similar double coil system .
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Y. Chen, S. Paul, J. Bird and K. Zhang, "A 3-D analytical model for a double Halbach linear array electrodynamic suspension system," 2015 IEEE Magnetics Conference (INTERMAG), Beijing, 2015, pp. 1-1.