A Hall Sensor Based Position Measurement Hybrid Magnetic Levitation System

This paper presents a hall sensor-based position measurement of hybrid magnetic levitation system (MLS) developed in the laboratory for applications of contactless operations at a microscale. Cylindrical permanent magnets and iron-core electromagnetics are used to build a desire hybrid magnetic field of the MLS. The nonlinear magnetic flux density model of the MLS is first deduced. Based on the deduced model, the mathematical relation of the current supplied to the electromagnet and the position of the levitation object was obtained and analyzed. And then, the installation of the linear Hall-effect sensors was determined theoretically. Furthermore, the solution model for the position of the levitation unit was given. Finally, the effectiveness of the solution model of the MLS is validated by simulation analysis.