摘要
提出基于异形板振动驱动的平面运动电机新原理,以异形板的两纵杆上端作为驱动足。利用两纵杆的面内一阶反对称纵振分别与面内二弯、面外二弯的振动耦合,在驱动足形成沿xOy、zOy面的椭圆轨迹,推动动子x、z向自由度运动。阐释了电机驱动机理,推导出驱动足椭圆轨迹方程。建立定子多工作模态频率一致性优化模型,确定了定子尺寸;设计了电机装配结构;建立了电机的限元数值模型,求得定子工作模态及频响特性,仿真出驱动足的两相椭圆运动,从而验证了电机原理。探索出电机调频、调压、调相位运动特性。当正常电激励时,驱动足沿x、y、z向振幅可达1.42μm、1.28μm、1.33μm,电机x、z向速度有望达156mm/s、146mm/s。
The principle of a planar motor driven by the vibration of the abnormal plate is presented in this paper.The upper ends of the two longitudinal rods of the abnormal plate are used as the driving feet.The stator's 1st longitudinal mode,2ndin-plane bending mode and 2nd out-plane bending modes were determined as the working modes,making the motor's drive ends run in ellipse trajectories in xOyand zOyplanes to push the slider move along xand zfreedom directions.The driving principle of the motor is introduced,and the elliptic trajectory equation of the driving foot is derived.An optimization model of the multi-mode frequency consistency of the stator is established and the size of the stator is determined.The assembly structure of the motor is designed.A FEM model for the motor is estbalished so that the operating modes and frequency response characteristics of the motor are calculated.The elliptic motions along xOyand zOyplanes are simulated,so the motor's principle are validated.The motor's characteristics of frequency modulation,voltage regulation and phase modulation are investigated.The results show the vibration amplitudes of the driving feet along x,yand zdirections are 1.42μm,1.28μm and 1.33μm respectively,and the motor speed along xand z directions can reach to 156mm/s and 146mm/s.at the normal electric excitation
出处
《压电与声光》
CSCD
北大核心
2017年第3期350-357,共8页
Piezoelectrics & Acoustooptics
基金
国家自然科学基金资助项目(51665040)
武汉大学大学生创新创业基金资助项目(201710486079)
关键词
压电换能器
平面电机
驱动机理
结构优化
动力学特性
piezoelectric transducer
planar motor
driving mechanism
structural optimization
dynamic charac teristics
