A nut-type ultrasonic motor and its application in the focus system
A nut-type ultrasonic motor and its application in the focus system作者机构：Department of Physics Tsinghua University Beijing 100084 China Boly Media Communications LTD (Shenzhen) Shenzhen 518031 China
出 版 物：《Chinese Science Bulletin》 (CHINESE SCIENCE BULLETIN)
年 卷 期：2009年第54卷第20期
页 面：3778-3783页
核心收录：
学科分类：1304[艺术学-美术学] 13[艺术学] 080801[工学-电机与电器] 0808[工学-电气工程] 08[工学] 0804[工学-仪器科学与技术] 0802[工学-机械工程]
基 金：Supported by the National Natural Science Foundation of China (Grant Nos. 50577035 & 10676015) National High-Tech Research and Development Program of China (Grant No. AA02Z472)
主 题：自动对焦系统 超声波电机 螺母 应用 直线运动 直接驱动 迷你手机 超声波马达
摘 要：This article reports a screw-driven polyhedron linear ultrasonic motor(USM) of *** is comprised of a stator,which is a threaded metal nut bonded with piezoelectric plates on its external surface,and a rotor with external threads,which engage with the internal threads of the stator.A traveling wave in the plane is stimulated on the stator when harmonic electric signals are applied to the piezoelectric *** traveling wave drives the rotor to rotate,and the threads transform the rotation into a linear *** lens can be fixed in the rotor and realize the integrated design of the auto focus *** structure can omit retarder and directly drive to obtain a high accuracy of positioning,and it is shockproof.A mini AF cellular phone module(8.5 mm×8.5 mm×5.9 mm) driven by this motor was made and an image resolution of 3-5 MP was obtained in the module prototypes of the cellular phone.
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