イオンドラグ力によるEHD流を応用したDCマイクロモータの研究

概要

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This paper describes quite a new type of ion drag micromotor. In this micromotor driving torque is delivered by an ionic current in liquid, though in usual motors generated by electronic current. The motor utilizes an ion drag force by drifting n-butyl alcohol ions accelerated by the applied field between electrodes. Applying special electrodes which are covered by evaporated SiO thin films on its half side and a n-butyl alcohl as an ion seed in an insulating liquid, we could realized a rotating motor with a DC power source without any switching circuit which is dispensable to many usual motors. The ionic current and the rotational speed of the experimental motor were nearly proportional to the applied field strength respectively. The maximum rotational speed of 40 rps was obtained at the applied field of 3×106V/m. The rotational speed and the output torque of the motor were analized by the ion drag mechanism. The experimental results for rotational speed agreed well with the calculated values.