Modelling Electromagnetic Suspension Force Using Measured Inductance-Airgap Data

Electromagnetic suspension system is commonly used in the field of high-speed vehicle, conveyor system, tool machines and frictionless bearing. Modelling a magnetic system requires modelling the magnetic force characteristics together with the current and the position. In this work; a 1D look-up table, of measured data, was used to represent the inductance as a function of the airgap. A 2D look-up table was generated to represent the electromagnetic force as a function of the current and the airgap. The proposed model account for both inductance variation and current variation as the airgap is changing.