旋轉輸出之換能器設計研究

A Study of Rotational Type of Transducer

李柏坦(BA TAN-LE)

指導教授 ： 丁 鏞

中原大學/工學院/機械工程研究所/碩士(2009年)

https://doi.org/10.6840/cycu200900961

摘要

摘 要

在本文中，為滿足旋轉的需求，研製混合式轉換器。此混合式的轉換器係由一組縱向壓電陶瓷振動器和一組扭轉壓電陶瓷振動器組成。研究主要重點是利用退化方法來搜尋縱向和扭轉兩組壓電陶瓷振動器之共振頻率，透過機構設計使其能使用同一驅動頻率。研究中發現藉由設計一個附著於扭轉壓電陶瓷振動器的模板，可以獲得一個範圍之共振頻率，如此可提供縱向和扭轉振動器多重選擇，依需求進行最佳化設計。
研究中將展示轉換器之結構設計及退化方法之範例。利用所建立之定子有限元素模型，藉使用ANSYS模擬縱向與扭轉振動器之共振頻率，且發現轉換器的輸出為一Lissajous圖形。此外，針對所搜尋之退化共振頻率範圍，利用數學模式計算定子及轉子之力矩及速度輸出，以獲得的最佳化設計之結果，並驗證其轉換器的功能。

關鍵字

共振頻率退化方法 ； 縱向壓電陶瓷振動器。 ； 混合式轉換器 ； 扭轉壓電陶瓷振動器

並列摘要

Abstract

In this thesis, a hybrid transducer is built in order to provide rotation. A new design of hybrid transducer consisting of individual longitudinal and torsional vibrators is investigated. Degeneracy approach for searching the same resonant frequency of both the longitudinal and torsional ceramic vibrators is the primary task of hybrid transducer design. In this study, by using a template attached to the torsional ceramic vibrator, a range of degeneracy is found, which provides more possible configuration design of the longitudinal and torsional vibrators. A case study is presented to demonstrate the structure design and the approach of degeneracy. A FE model of stator is developed to simulate the resonance frequencies of longitudinal vibrator and torsional vibrator by using ANSYS. A Lissajous figure of the output of the transducer is found. Also, an optimal design of large torque and speed is achieved based on the searched range of degeneracy. With the determined driving frequency corresponding to different structure design of the longitudinal and torsional vibrators, simulation and analytical computation is carried out to verify the performance of the stator and rotor of the transducer.

並列關鍵字

Degeneracy ； Hybrid Transducer ； Piezoelectric longitudinal vibrator. ； Piezoelectric torsional vibrator

參考文獻

[1] M. Kurosawa and S. Ueha, “Hybrid Transducer Type Ultrasonic Motor”, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, vol. 38 No.2, (March 1991).

[2] K. Nakamura, M. Kurosawa, and S. Ueha, “De-sign of a Hybrid Transducer Type Ultrasonic Motor”, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, vol.40 No.4, (July 1993).

[3] K. Nakamura, M. Kurosawa, and S. Ueha, “Characteristics of a Hybrid Transducer-Type Ultrasonic Motor”, IEEE Transactions on Ultras-onics, Ferroelectrics and Frequency Control, vol. 38 No.3, (May 1991).

[4] K. Nakamura and S. Ueha, “Performances of a Hybrid Transducer-type Ultrasonic Motor as a Function of the Size”, Ultrasonics Symposium, New York, 1994, pp. 557-560.

[5] T. Morita “A smooth Impact Rotation Motor Using a Multi-Layered Torsional Piezoelectric Actuator”, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, vol. 46 No.6, (November 1999).