誘電液体中の DC 電場下で回転する電界応答ポリマーコンポジットロータからなる小型マイクロモータの開発

抄録

Quincke rotation is the rotation of non-conducting objects immersed in dielectric liquid and subjected to a strong homogenous DC electric field. The rotation is spontaneous when the field exceeds a threshold value. In this research, for the purpose of developing a micro motor utilizing the Quincke rotation, polymer composites have been developed as materials for a micro motor rotor, and the motor characteristics of a miniaturized cubic micro motor of 3 mm square and 7 mm in height with cylindrical electro-active-polymer(EAP) composite rotors of 1.0-1.5 mm in diameter and 0.5-2.5 mm in length, are investigated as a function of electric field intensity and the diameter and length of the cylindrical rotors using a high speed video camera. It is found that the rotational speed of the motor without load increases with increasing electric intensity and decreasing both diameter and length of the rotor, and the induced torque of the motor decreases with increasing the rotational speed and increases with increasing the electric intensity and decreasing both diameter and length of the rotor. And also, we have succeeded in controlling the rotational direction using two added electrodes both sides of GND electrode in order to break the symmetry of the electric field.