Applications of Disk Type Piezoelectric Transformer in Ultrasonic Motor Low Voltage Drive

• Main Authors: Kai-HanChen, 陳愷瀚
• Other Authors: Mi-Ching Tsai
• Format: Others
• Language: zh-TW
• Published: 2016
• Online Access: http://ndltd.ncl.edu.tw/handle/18706231215674689916

碩士 === 國立成功大學 === 機械工程學系 === 104 === Ultrasonic motors are usually operated at a higher AC voltage than conventional function generators. This implies the need of a voltage step-up transformer. In this paper, a piezoelectric transformer is integrated with a USM. However, when a PT and a USM are combined, the PT’s resonance frequency shifts. This paper aims to provide an alternative method to determine the characteristics of a PT and a USM from measurement. A block diagram approach is conducted to analyze the dynamic characteristics of the PT and the USM at their resonance frequencies; thus, the frequency shift and gain of the PT when combined the USM can be easily calculated. The experimental results demonstrate the effectiveness of the proposed method. Finally, we use a proportional control algorithm to realize the PT-USM positioning control.