創新音圈致動器設計與分析

Design and Analysis of a Novel Voice-Coil Actuator

陳志豪(Chi-Hao Chen)

指導教授 ： 王培仁

國立清華大學/工學院/動力機械工程學系/碩士(2006年)

摘要

近年來隨著數位相機工業的發展，線型致動器性能及控制精度亦隨之提升，進而必須兼顧輕薄及省電之需求；本論文針對音圈致動器（Voice Coil Actuators）之微型及效率，首先進行習知音圈致動器分類探討，介紹其基本結構、磁路與設計原理，再依霍巴磁路理論（Halbach Magnetic Theory）進行創新音圈致動器之建構，並進行磁路建模與電腦輔助分析，期能達成高功率密度暨微型化之目的；為驗證具實用性之永磁組合，本研究提出四塊梯形及八塊九宮格兩種架構進行雛型實體驗證程序，經基本儀器量測驗證過程，確認實驗結果及電腦輔助分析兩者間數據誤差於百分之五左右，並以釹鐵硼磁石達到平均氣隙磁通密度0.9特司拉之目標，且已建立無軟磁材料設計致動器流程，期望對高功率密度微型音圈致動器之生產製造，建立標準化之設計過程，奠定永磁結合磁路之設計分析基石。

關鍵字

微型化 ； 霍巴理論 ； 音圈致動器

並列摘要

Along with the development in digital camera industry recently, the performance and control accuracy of today’s linear actuators has been much improved as well together with compactness and energy saving also being achieved. Hence, in this thesis, the basic structure, magnetic circuit, and operational principle of voice-coil motors are first discussed according to the various types of conventional designs. Then, Halbach magnetic theory was employed for designing a novel voice-coil motor with further analysis on basic magnetism with the help of computer aided engineering tools in order to achieve the goals. For further experimental verifications of practical design on permanent magnet, two types of configurations were proposed, namely four-piece trapezoidal and eight-piece square-grid. From the experimental results measured by fundamental instrumentation, average errors between the experiments and simulations are roughly 5 %. The design procedures for permanent magnets without soft magnetic materials have been established by making use of NdFeB magnets with 0.9 T in the air gap. Moreover, fundamental and standard design and manufacture process has been fulfilled on high-power voice-coil actuators in this thesis.

並列關鍵字

Miniaturization ； Halbach Theory ； Voice-Coil Motor

參考文獻

[15] OeMag International Co., Ltd., America：http://www.oemagnet.com./

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