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纵-弯复合旋转式超声波电动机的优化设计与性能分析

, PP. 33-41

Keywords: 纵-弯复合型,超声波电动机,优化设计,冲量定理,数值分析

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Abstract:

提出一种采用压电叠堆和压电双晶悬臂板构成的新型纵-弯复合旋转式超声波电动机,利用电动机定子的一阶纵振动和二阶弯曲振动模态复合形成接触头的椭圆运动,实现电动机的旋转驱动。分析了电动机的总体结构和运行机理,利用有限元方法建立了电动机定子的机电耦合模型,通过对定子的模态分析和结构优化设计,确定了定子的两个工作模态以及两工作模态频率的调谐。通过对定子振动特性的分析,验证了电动机设计方法和设计思路的正确性。最后,利用冲量定理和能量守恒原理建立了电动机的力传递模型,数值分析了电动机的机械输出特性。研究结果对于改善和优化超声波电动机的输出性能以及电动机的建模具有实践指导作用。

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