Surface winding for moving small conducting particles

The paper describes experiments aimed at producing movement of small square particles of aluminium and copper. It is shown that the conventional slotted linear induction motor should be avoided as the slot pitch sets a lower limit to the size of particle that can be moved. A simple surface winding was constructed from 0.6 mm diameter enamelled copper wire stretched over a wooden board. Experiments were carried out at 754 Hz using a transient resonant circuit to supply 2-phase currents of peak value 537 A. The transient circuit caused square particles of 1.2 mm side to slide over a short measurable distance. A theoretical expression for the force on the particle is developed