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一种方底座短柱超声波电机的设计

, PP. 134-139

Keywords: 柱体超声波电机,方底座,支撑方式,自由-固定振动模式

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Abstract:

柱体超声波电机不仅具有低速大转矩、断电自持、响应快、无电磁干扰等良好特性,而且由于采用兰杰文振子,结构较为简单。为了提高其实用性,在设计过程中,支撑方式简单,易于生产,长度小成为重要的设计目标。提出了一种自由-固支振动模式的定子结构,长度直径比小,支撑部位位于定子方形底座的四角。分析了电机运行机理,并采用有限元法计算了周向不对称性对定子上端表面各节点轴向位移的影响。利用Labview对样机进行扫频,最后,利用PSV—400—M2型激光测振仪测量了定子振型及定子上端面质点的轴向振动幅值,其振型接近自由-固支振动模式,最大轴向振幅为1.96μm,仿真和测量数据表明方底座电机的设计是可行的。

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