摘要
弛豫铁电单晶以其良好的压电性能和低温适应性成为超声电机性能提升理想的替代材料。由于单晶物理性能的各向异性,在单晶超声电机设计过程中必须考虑振幅均匀性和振型干扰问题。该文通过对两种具有振幅均匀性的单晶切向进行压电、介电、弹性性能的计算和有限元分析,分析了单晶超声电机定子的工作频率、振幅和振幅均匀性;设计制作了单晶超声电机样机,并对其进行了测试。结果表明,20mm单晶超声电机堵转扭矩达到0.057N·m,优于同直径的压电陶瓷超声电机。
The relaxor ferroelectric single crystals have become an ideal substitute materials for improving the performance of ultrasonic motor as their excellent piezoelectric performance and cryogenic property.But the amplitude uniformity of stator and the interference of vibrations have to be considered in the process of single crystal ultrasonic motor design due to the anisotropy of single crystals.The operating frequency,amplitude and amplitude uniformity of stator are analyzed through the calculation and the finite element analysis of the piezoelectric,dielectric and elastic performance of two cutting orientations with amplitude uniformity.A prototype of single crystal ultrasonic motor is designed and fabricated.The results show that the proposed single crystal ultrasonic motor with20mm has a locked-rotor torque of 0.057N·m,which is better than that of the piezoelectric ceramic ultrasonic motor with the same diameter.
出处
《压电与声光》
CSCD
北大核心
2017年第3期336-340,共5页
Piezoelectrics & Acoustooptics
基金
国家"九七三"计划基金资助项目(2015CB6546020)
产业技术研究与开发基金资助项目(2013DFR50470)
高等学校学科创新引智计划基金资助项目(B14040)
关键词
弛豫铁电单晶
超声电机
切型
振幅
relaxor ferroelectric single crystal
ultrasonic motor
cutting orientation
amplitude
