압전회전작동기를 이용한 스텝모터에 관한 연구

초록

In this paper, A new type of piezoelectric step motor using piezoelectric torsional actuator and a pair of one-way clutch bearing is designed, manufactured and tested. The torsional actuator consists of 16-polygonal tube that can produce angular displacement using shear mode of piezoceramic. One way clutch bearing convert oscillation of torsional actuator into continuous rotation. After performance testing of torsional actuator, the optimum condition for driving motor is investigated in terms of wave shapes, excitation frequency and electrical field. The performance of the motor is experimentally evaluated. As a result, square wave have a larger rotation speed than sin wave, and the maximum rotation speed of 64 rpm is measured at 3850 Hz