光碟機主軸馬達之滑動觀測器設計與實作架構建立

隨著資訊產業的發展，電腦周邊設備的需求快速增加，光碟機已成為個人電腦的基本配備。而現今工業用光碟機主軸馬達多以無刷直流馬達加居多，就穩定性及功率密度而言，無刷直流馬達是一良好的驅動裝置。但無刷直流馬達需要感測器來偵測馬達轉子之位置，驅動器才能送出適當的切換信號使馬達正常運轉，而加裝霍爾感測器不但會使整個系統體積變大，且霍爾元件對溫度的靈敏度很大因而引響馬達的性能，也因加裝霍爾感測器不但會使整個系統體積變大。針對此問題，本研究將利用設計滑動觀測器來估測主軸馬達之轉速，運用測量主軸馬達之相電壓與相電流作為滑動觀測器作為輸入，來達成轉速估測。在實驗方面，利用設計電壓合成電路來穫取相電壓，在電流方面則應用LEM公司所生產的電流感測器配合電路設計來感應電流，並透過LabVIEW軟體來頡取電壓及電流的資訊，最後將頡取電壓及電流的資訊應用MATLAB/Simulink來運算，進而達成轉速估測的目的，本研究在實驗部份只完成實驗架構的建立並未完成實作驗證。

關鍵字

速度控制；觀測器；無刷直流馬達

並列摘要

The optical disc drive (ODD) becomes one of important components in a personal computer nowadays. Industry commonly utilizes spindle motors in the types of brushless DC motor to power CD-ROMs for data-reading. In terms of control performance, stability and power for a small spindle, the brushless DC motor is a better choice over other driving electromagnetic mechanisms. In most speed-control mechanisms, Hall sensors play important roles to provide current speed signal for spindle speed regulation of the DC motor. It is well known, however, that the performances of the Hall sensors are sensitive to temperature change, leading to measuring error of the feedback speed signal. This study aims to solve the aforementioned problem by developing a sliding-mode observer to estimate current rotational speed of the spindle based on input voltages and currents to the motor. Experimental study is initiated to verify the theory of sliding-mode observer, where Labview and current sensors by LEM are utilized to accomplish the validation.

並列關鍵字

Speed Control ； Brushless DC Motor ； observer

參考文獻

國立中央大學機電研究所, 民國九十年六月

國立中央大學機電研究所, 民國九十年六月.

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2. T. H. Lin and C. P. Cheng, “Adaptive control for a sensorless permanent-magnet synchronous motor drive,” IEEE Trans. Aerospace and Electronic Systems, vol. 30, no. 3, pp. 900-909, 1994.

3. N. Ertugrul and P. Acarnley, “A new algorithm for sensorless operation of permanent magnet motors,” IEEE Trans. Industry Applications, vol. 30, no. 1, pp. 126-133, 1994.

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光碟機主軸馬達之滑動觀測器設計與實作架構建立

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