臺灣博碩士論文加值系統

超音波馬達驅動器，需要有準確的共振頻率和良好的驅動能力，以期能達到超音波馬達最佳共桭效果。在電路方面，將已有的超音波馬達控制系統電路動作行為與原理，詳加以研究，目前的控制電路仍大多為離散元件所構成，製作較為費時，量測調整困難。所以我們使用單晶片微控制器來控制驅動器的輸出頻率。由於單晶片微控制器易於可程式化，可以很容易且精確的改變輸出頻率，在超音波馬達的模組參數量測和實驗上有很大的幫助。另外，在驅動能力方面，良好的驅動能力使我們專注在交換式電源供應器的設計上。

The ultrasonic motor (USM) driver is needed accurate resonance frequency and good driving ability to reach optimum resonance effect. We begin with studying the behavior and principle of the USM control circuit block from the existed patterns, made from several parts, which are time cost and difficult for measures and adjustments. So we utilize the micro-controller to control the output frequency from the USM driver. An advantage of the micro-controller is easily programmable, so we can vary the output frequency easily and exactly. And it can help us a lot to model the parameter of the USM measurement and experiment. And further, on the driving ability hand, it can make us to concentrate on the design of the switching mode power supply to provide good driving ability.

Contents
1 Introduction
1.1 Survey
1.2 Organization of this thesis
2 The ultrasonic motor
2.1 Introduction
2.2 The structure of the ultrasonic motor
2.3 The characteristics of the piezoelectric ceramic
3 The power supply of the ultrasonic motor
3.1 Introduction
3.2 Types of the power supply
3.3 The switching power supply
3.3.1 Brief
3.3.2 Working principle
3.3.3 The boundary of Continuous Conduction Mode and
Discontinuous Conduction Mode
3.4 Working priciples of the power circuit
3.4.1 The initial stage
3.4.2 Start up circuit
3.4.3 Pulse Width Modulation (PWM) and feedback control
circuit
3.4.4 Protecting circuits
3.4.5 A high voltage of the regulated power supply
4 The driver of the ultrasonic motor
4.1 The parts of the hardware
4.2 The measurement results analysis
5 Conclusion
5.1 Future research
A Technical specifications of the ceramic motor and parameters
of the piezoelectric ceramic material
B Elastopiezodielectric matrix of various crystal classes
C Design of the SPS transformer
D Effect of different input frequency and resonant frequency of
LCs

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