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Detailed Program
Paper Number : PI-P03
Time Frame : 12:00~13:30
Presentation Date : Thursday, 27, November
Session Name : Piezoelectric Device & Application
Session Chair 1# : -
Session Chair 2# : -
Driving Characteristics of Hexadecagon Shaped Ultrasonic Motor
Prof. Seongkyu Cheon
Changwon National University
Novel hexadecagon shaped ultrasonic motor was proposed. It is easy to fabricate the stator because of the simple structure of the stator. Stator of the hexadecagon ultrasonic motor is composed of an elastic ring and ceramics. The elastic ring has sixteen sides and angles. The eight ceramics are attached on outer surface of eight sides of the ring. When rotor of cylindrical shaft is inserted inside of the ring stator, central lines of sixteen sides of stator hold the shaft by slight pressures. This slight pressure is a preload of the motor and it could be controlled by radius and thickness of the ring. When two AC voltages which have 90 degree phase difference are applied to the eight ceramics, elliptical displacements of inner surface of the ring are obtained. These elliptical displacements of inner surface rotated the shaft rotor through frictions. The proposed hexadecagon ultrasonic motor was designed and analyzed by using finite element analysis (ATILA), depending on the number of piezoelectric ceramic and hexadecagon mode. As a result, the stator was optimally designed by defining the output displacement characteristics depending on change in the chosen parameter. Figure 1 shows structure of hexadecagon shaped ultrasonic motor.
Acknowledgements : Following are results of a study on the \\\"Leaders INdustry-university Cooperation\\\" Project, supported by the Ministry of Education(MOE) This work was supported by the National Research Foundation of Korea(NRF) grant funded by the Korea government (MEST) (No. 2011-0030058).