| Title |
Fabrication of the Windmill Type Ultrasonic Its Characteristics of Torque and Bidirectional Revolution |
| Authors |
김영균(Kim, Young-Gyun) ; 김진수(Kim, Jin-Soo) |
| Keywords |
Windmill Type Ultrasonic Motor ; Endcap ; Piezoelectric Ceramic ; Torque ; Bidirectional Revolution |
| Abstract |
In this paper, the windmill type ultrasonic motors with 11.35 mm diameter, 2.87 mm thickness of metal endcap and 1.47 g weight were fabricated. Effects of slots and thickness on torque characteristic in the windmill type ultrasonic motor were investigated, when stator's slots were changed from 4, 6, 8 and thickness 0.15 mm, respectively. Specially designed metal endcaps with windmill shaped cutting can provide longitudinal and torsional displacements simultaneously as the ceramic disk vibrates radically. The windmill type ultrasonic motor has only three components: a stator element with windmill shape slotted metal endcap, a rotor and bearing. Ultrasonic motor stimulated to ultrasonic oscillations by piezoelectrics to drive a rotor via friction contact. The ultrasonic motor fabricated here was the windmill type ultrasonic motor operated by single-phase AC source. Bidirectional revolution using single-phase high frequency for driving the ultrasonic motor was presented. |