Center for Energy Harvesting Materials and Systems (CEHMS), Virginia Tech, Blacksburg, VA, USA.
IEEE Trans Ultrason Ferroelectr Freq Control. 2012 Jan;59(1):98-107. doi: 10.1109/TUFFC.2012.2160.
This paper proposes an L-shaped piezoelectric motor consisting of two piezoelectric bimorphs of different lengths arranged perpendicularly to each other. The coupling of the bending vibration mode of the bimorphs results in an elliptical motion at the tip. A detailed finite element model was developed to optimize the dimensions of bimorph to achieve an effective coupling at the resonance frequency of 246 Hz. The motor was characterized by developing rotational and linear stages. The linear stage was tested with different friction contact surfaces and the maximum velocity was measured to be 12 mm/s. The rotational stage was used to obtain additional performance characteristics from the motor: maximum velocity of 120 rad/s, mechanical torque of 4.7 × 10-(5) N·m, and efficiency of 8.55%.
本文提出了一种由两个长度不同的压电双晶片垂直排列组成的 L 型压电马达。双晶片的弯曲振动模态的耦合导致尖端产生椭圆运动。建立了详细的有限元模型来优化双晶片的尺寸，以在 246 Hz 的共振频率下实现有效的耦合。通过开发旋转和平移阶段来对电机进行特性分析。线性阶段测试了不同的摩擦接触表面，测量到的最大速度为 12mm/s。旋转阶段用于从电机获得附加的性能特性：最大速度为 120rad/s，机械扭矩为 4.7×10^(-5)N·m，效率为 8.55%。
