壓電致動風扇之模擬與設計

本文主要是針對文獻當中所提出的一種三相偏心薄盤式壓電致動器，進行結構模擬與分析，從而設計出一結合三相對稱壓電致動器與風扇葉片結合之新型壓電致動風扇機構。文中藉由ANSYS動態模擬軟體，模擬、分析三相偏心薄盤式壓電致動器的振動模態，經由模擬驗證出確實有產生三相的連續驅動波動之行進波，且不同週期時間內之三相交替行進波的位置均持續改變，且明顯形成一環繞驅動點螺釘的旋轉運動力。因驗證其具有旋轉之能力，故將其應用於驅動風扇，使之成為新型壓電致動風扇。根據文獻中所提出之三相偏心薄盤式壓電致動器，因不具有對稱性，故本文對其進行調整修正，提出了三相對稱壓電致動器，使其與風扇結合。另文中所提出之新型壓電致動風扇機構，其設計則是利用SolidWorks繪圖軟體，繪製機構模型，此機構分別為三相對稱壓電致動器、壓電致動器固定基座、風扇葉片以及傳動機構等四大類。其中，本機構之壓電致動器，因無法直接安裝於原軸流式電磁風扇內，故另行設計壓電致動器之固定基座。此新型壓電致動風扇在頻率75 kHz、電壓振幅為25 V的驅動條件下，其轉速可達2100 rpm以上。

關鍵字

ANSYS ；三相對稱壓電致動器；新型壓電致動風扇； SolidWorks

並列摘要

The study was the design of the new piezoelectric actuators fan which was combined with the three-phase symmetrical piezoelectric actuator and fan blades from the structural simulation and analysis of the three-phase eccentric thin disc piezoelectric actuator in the existing paper. With the simulation of the three-phase eccentric thin disc piezoelectric actuator vibration mode analyzed by ANSYS dynamic simulation software, there was the three phase continuous driving wave, the wave position in the different cycle was changed continuously and obviously formed a rotational motion force around the driving point screw. The driving fan verified to have rotation ability to become new piezoelectric actuators fan. According to there was no symmetry of the three-phase eccentric thin disc piezoelectric actuator in existing paper, the study designed the three-phase symmetrical piezoelectric actuator combined with the fan from the adjustment and correction of the three-phase eccentric thin disc piezoelectric actuator. The design of the new piezoelectric actuators fan mechanism was the use of SolidWorks graphics software to draw the model of mechanism. The mechanism included the three-phase symmetrical piezoelectric actuator, fixed base of the piezoelectric actuator, fan blades and transmission. The fixed base was designed because the piezoelectric actuator could not install directly in the original axial flow electromagnetic fan. The rotational speed of the new piezoelectric actuators fan could reach up to 2100 rpm in the driving condition of the frequency of 75 kHz and voltage amplitude of 25 V.