基于超声电动机驱动的新型可变光圈研究  

Research on New Variable Aperture Driven by Ultrasonic Motor

作　　者：赵石淼 孙自强[1] 王忠岭 闫明[1] ZHAO Shimiao;SUN Ziqiang;WANG Zhongling;YAN Ming(Liaoning Province Impact Protection and Damage Assessment Technology Engineering Research Center,Shenyang University of Technology,Shenyang 110870,China;Liaoning Zhonglan Photoelectric Technology Co.,Ltd.,Panjin 124000,China)

机构地区：[1]沈阳工业大学辽宁省冲击防护与损伤评估技术工程研究中心,沈阳110870 [2]辽宁中蓝光电科技有限公司,辽宁盘锦124000

出　　处：《机械工程师》2024年第8期42-44,共3页Mechanical Engineer

摘　　要：为解决音圈电动机驱动的可变光圈驱动力较小及叶片开合卡顿等问题,结合旋转超声电动机结构,提出了一种超声电动机驱动的新型可变光圈结构。压电振子为驱动组件,设计为中空结构,转子转动带动叶片开合,达到改变光圈大小的目的。建立了压电振子的有限元模型,确定了工作模态及谐振频率,并研制了试验样机,搭建测试平台并对样机进行输出性能测试。实验表明,当激励电压峰-峰值为100 V,驱动频率为30.3 kHz时,样机的最大空载转速为238 r/min,堵转力矩为1.2 N·mm;在最低激励电压峰-峰值为60 V时,可变光圈可实现双向开合。In order to solve the problems of small driving force of variable aperture driven by voice coil motor and slow opening and closing of blades,a new variable aperture structure driven by ultrasonic motor is proposed.As the driving component,the piezoelectric vibrator is designed as a hollow structure.The rotor rotates to drive the opening and closing of the blade to achieve the purpose of changing the aperture size.The finite element model of piezoelectric vibrator is established,the working mode and resonant frequency are determined,and the prototype is developed,the test platform is built and the output performance of the prototype is tested.The experimental results show that when the excitation peak-peak voltage is 100 V and the driving frequency is 30.3 kHz,the maximum no-load speed of the prototype is 238 r/min and the blocking torque is 1.2 N·mm.When the minimum excitation peak-peak voltage is 60 V,the variable aperture can realize bidirectional opening and closing.

关 键 词：超声电动机 可变光圈 行波驱动 有限元分析 结构优化 输出性能 

分 类 号：TN384[电子电信—物理电子学] TM356[电气工程—电机]