圓薄型壓電離合器之製作與性能測試

Development and Performance Test of a Thin Disc Piezoelectric Clutch Mechanism

本文探討圓薄型壓電離合器之設計、製作與性能測試。此離合器是由主動摩擦件與從動摩擦件所組成，且任一摩擦件係由壓電蜂鳴片及其它相關組件所構件而成。首先，說明壓電蜂鳴片之結構與壓電離合器之工作原理。其次，利用碳粉顯影技術觀測蜂鳴片之振動模態，此模態是由蜂鳴片在通電後之逆壓電效應所產生。接著，完成圓薄型壓電離合器之結構設計與組裝。最後，根據實驗結果探討輸入交流電源之振幅及頻率對壓電離合器系統中主、從動軸之離合效果與轉速變動之影響，以及針對壓電離合器系統中主、從動軸之接合面於各階段操作下之摩擦力進行研究與討論。

This paper investigates design, construction and performance tests of a thin disc piezoelectric clutch mechanism, including a driving frictional member and a driven frictional member. Each member consists of a piezoelectric buzzer and other components. Both the structure of the piezoelectric buzzer and the principle of the piezoelectric clutch are first expressed. Then, patterns of vibration modes in the piezoelectric buzzer are induced by inverse piezoelectric effect, and measured using carbon-powder imaging while the piezoelectric buzzer was driven by AC power. Moreover, the piezoelectric clutch is designed and constructed. Finally, from measured results, effects of amplitudes and frequencies of AC voltages on clutching performance and rotational speeds of the driving and driven shafts in the piezoelectric clutching system are measured, and frictions between contact surfaces of the driving and driven shafts are discussed.