Browsing by Author "Tsai, C. L."

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Design of Compact Linear Electromagnetic Actuator for Auto-Focusing in Phone Camera
(2011-12-01)
Lai, L. K.
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Tsai, C. L.
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Liu, T. S.
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機械工程學系
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Department of Mechanical Engineering
This paper proposes a novel linear electromagnetic actuator (LEA) for auto-focusing of compact phone cameras. An LEA consists of permanent magnets, iron cores, and coils, which are all magnetic circuit components. When coils are powered, induced magnetic field generates N and S poles around iron cores. Thus, unlike voice coil motors (VCMs) that employ the Lorentz force, the motion of the moving part in this study is arisen from a property-same poles repel each other while opposite poles attract each other. When compared to conventional VCM actuators in simulation results, the proposed LEA generates larger force, whereas using smaller current.