Design, analysis, fabrication, control and comparative study of two different-shaped plate levitation prototypes


This paper presents a comparative study on the design, modelling, electromagnetic analysis based on finite-element software, fabrication and experiment on rectangular flat (148 g) and C-shaped (148 g) levitation prototypes based on steel plates. No mechanical restrainer has been used in the transverse direction for the levitation. This aspect of the work is an improvement over existing work reported in the published literature. The entire set-up has been designed, fabricated, analytically investigated and experimentally evaluated and verified. The finite-element model (FEM) has been derived using standard commercial package(s). The analytical model has been obtained using specific permeance concepts following Robert Pohl’s method. Excellent correlation between the predicted and experimental results is a highlight of the work. The stability against transverse mechanical perturbation has also been investigated. Control system design and implementation is successfully done.

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The authors acknowledge the support received from CSIR (Government of India) in the form of fellowship received by one of the authors. The help received from the Central Tool Room and Training Centre (CTTC, Kolkata), an MSME concern under the Government of India, is also duly acknowledged. The support of the Institute authorities, the Department of Electrical Engineering and the research colleagues, particularly Mr P Mukherjee at the Advanced Power Electronics (APE) Laboratory, Department of Electrical Engineering, IIEST, Shibpur, is also gratefully acknowledged. Special mention is made of the co-operation received from Mr N Dutta, Project Technical Assistant at the APE Laboratory.

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Correspondence to Janardan Kundu.

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Kundu, J., Sengupta, M. Design, analysis, fabrication, control and comparative study of two different-shaped plate levitation prototypes. Sādhanā 45, 53 (2020).

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  • Lead compensator
  • coil design
  • analytical modelling
  • FEM analysis
  • permeance
  • stability analysis
  • position sensor