應用D類功率放大器設計壓電馬達之驅動器

Application of class D power amplifier design for circuitry of Piezoelectric motor

葉晉池(Chin-Chih Yeh)

指導教授 ： 丁鏞

中原大學/工學院/機械工程研究所/碩士(2012年)

https://doi.org/10.6840/cycu201200926

摘要

本研究為設計一應用於壓電陶瓷馬達之驅動器電路，此驅動器電路是以D類功率放大器作為電源控制之基礎，此電路架構主要包括D類放大器、方波振盪電路、半橋電路、共振電路、方向選擇電路。驅動電路內含微處理器可以依命令端控制D類放大器之電壓輸出值，來改變半橋電路之上半橋與下半橋之電源電壓，達到控制半橋電路輸出方波電壓值之功能，再經由共振電路使輸出之電壓值達到驅動壓電陶瓷馬達之條件。方波振盪電路主要作用為產生頻率與壓電陶瓷馬達之共振頻率相同之方波，進而控制功率開關之功能。方向選擇電路為避免同時驅動壓電馬達之正向與反向運動。經實驗驗證所設計之驅動器電路達到控制最終輸出電壓之目的，其輸出頻率可達45kHz，輸出電壓可達400Vpp。

關鍵字

LC諧振電路 ； D類放大器 ； 壓電致動器

並列摘要

This research purpose is to design a driving circuit for the application of a piezoelectric ceramic motor. The driving circuit is designed based upon a class D power amplifier for power control. It mainly consists of a class D power amplifier, a square wave oscillator circuit, a half-bridge circuit, a resonant circuit, and a direction selection circuit. The control module of the driving circuit is designed by using a microprocessor to command the control voltage signal to the class D power amplifier, by which can control the voltage and power of the up or down half-bridge circuit. Therefore, the output voltage of the square-wave generated by the half-bridge circuit is appropriate. Thereafter the square wave signal is sent to the resonant circuit for driving the piezoelectric ceramic motor eventually. The main role of the square wave oscillator circuit is to produce the square wave with the same resonant frequency of the piezoelectric ceramic motor, which is able to control the power switching. The Direction selection circuit avoided driving the piezoelectric ceramic motor to forward and reverse movement at the same time. From the experimental testing, the designed driving circuit can produce accurate output voltage to control the piezoelectric motor. The driving circuit can provide 400Vpp at the frequency of 45kHz.

並列關鍵字

LC resonant circuit. ； piezoelectric actuator ； class D power amplifier

參考文獻

[18] 陳國威, “壓電陶瓷馬達之數位驅動控制電路設計,” 私立中原大學,機械工程學系, 碩士論文, 2002.

[19] 張啟原, 丁鏞, 莊錦煌, 張義峰, 黃建生, “數位式頻率可調變壓電驅動器之設計研究,” 中華民國自動控制研討會, pp. 144-149, 2003.

[21] 賴俊安, “兩級式壓電陶瓷驅動電路之設計研究,” 私立中原大學,機械工程學系, 碩士論文, 2004.

[22] 侯秉寬, “壓電致動器功率驅動電路之設計,” 私立中原大學,機

[1] A. Katsuki, H. Onikura, T. Sajima, T. Takei, and D. Thiele, “Development of a high-performance laser-guided deep-hole boring tool: Optimal determination of reference origin for precise guiding,” Precision Engineering, vol. 24, no, 1, pp. 9-14, 2000.