Observation of Contact-free 2D Micro Positioning using Diamagnetic Graphite

The "non-contact magnetic suspended technology" utilizing the diamagnetism of materials in room temperature range was expected to be a new energy-saving elemental technology. This report aimed to clarify the characteristics of a model for non-contact two-dimensional micro actuation of full passive magnetic suspended octagonal diamagnetic graphite PG and HOPG plate samples above 2D Halbach PM array. It was important to observe the non-contact displacement characteristics and response characteristics by controlling the excitation current of the electromagnet to control the diamagnetic repulsive force acting on the edge of the octagonal graphite plate sample. However, to realize two-dimensional non-contact drive of the PG plate sample, it was necessary to place electromagnets at two edges of the octagonal graphite plate sample, and the characteristics depend on the anisotropy of the graphite sample and the characteristics of the two electromagnets. In this observation model, the displacement angle characteristics in the first quadrant were clarified by experimental measurements after understanding the influence of the sample characteristics and electromagnet characteristics. This experimental measurement confirmed the possibility of non-contact micro positioning and micro actuation in all quadrants.