U型变截面薄板面内复合模态驱动的直线超声电机

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振动与冲击 ›› 2014, Vol. 33 ›› Issue (18) : 65-71.

论文

U型变截面薄板面内复合模态驱动的直线超声电机

贺红林，何文丛，刘文光

作者信息 +

Development of a Linear Ultrasonic Motor Driven by an U-shaped Stator’s In-plane Hybrid Vibration mode

HE Hong-lin HE Wen-cong LIU Wen-guang

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文章历史 +

摘要

提出一种U型变截面薄板结构驱动的压电直线超声电机，选定U板两纵杆的一阶反对称纵振和二阶对称弯振为工作模态。阐释了电机驱动机理，推导了定子驱动端椭圆运动轨迹；基于纵、弯工作模态频率一致性模型，优化了电机结构尺寸；通过谐响应分析及激光测振试验，证实了定子工作模态的存在及其纯正性；设计出电机装配结构，制作出其原型样机；构建电机驱动控制平台，驱动电机运转，验证电机原理的可行性。通过速度特性试验发现：当驱动频率为78.11kHz且电压幅值为240V时，电机最大运动速度可达125.6mm/s。

Abstract

An ultrasonic linear motor driven by a U-shaped stator’s 1st anti-symmetric longitudinal mode and 2nd symmetrical bending modes as the motor’s work modes, was proposed. The driving principle of the motor was explained, and the essential elliptical obits generated by the particles on the drive ends of the stator used to push the motor’s slider were derived. The optimal sizes characterizing the stator better work modal frequency consistency were acquired. The motor’s assemble structure was planned and designed, and a prototype of the motor was made. Harmonic response analysis and modal test were carried out on the stator which validated the existence of the work modes. A drive system was constructed to drive the motor, which demonstrated that the motor can run well. Speed characteristic experiment has been done for the motor. It shows that the motor can run at maximum speed of 125.6 mm/s as it is driven by a alternating voltage of 240 V with frequency of 78.11 kHz.

导出引用

贺红林;何文丛;刘文光. U型变截面薄板面内复合模态驱动的直线超声电机[J]. 振动与冲击, 2014, 33(18): 65-71

HE Hong-lin HE Wen-cong LIU Wen-guang. Development of a Linear Ultrasonic Motor Driven by an U-shaped Stator’s In-plane Hybrid Vibration mode[J]. Journal of Vibration and Shock, 2014, 33(18): 65-71