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标题：单相p型电机驱动机理及其结构设计 |
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作者：李斯，李朝东 |
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| 2016年第9期 访问次数：371次 |
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摘要：双相压电直线超声电机对驱动频率一致性要求高，给应用带来不便。单相驱动是解决上述问题的一种途径，单相驱动的直线超声电机设计要点是满足双向运动的驱动机理以及提高输出性能的结构设计。设计了一种新型的驱动足偏置的单相驱动双向运行的直线超声电机，功率传递路径短，推重比大。为研究电机驱动机理，建立了定子的有限元模型并对其工作模态、驱动足轨迹进行了分析；采用Ansys有限元对定子结构进行了优化设计并制作了原理样机进行了测试。测试结果表明，电机的双向运行性能良好，推重比大，有利于微型化。
关键词：单相驱动；压电；直线超声电机；双向运动；微型化
Abstract: Doublephasedrive piezoelectric linear ultrasonic motors had high requirement of consistency about driving frequency, which brought inconvenience to its application. Single phase driving was a way to solve the above problem. The main design points of single phase driven linear ultrasonic motor were the driving mechanism of bidirectional motion and improving the output performance by the optimal structure design. A novel offset driving foot, single phase driven linear ultrasonic motor with bidirectional operation was designed, then the FEM model of the stator, the analysis of working modal and driving foot trajectory were made to study its driving principle. Ansys was used to optimize the structure. The prototype was made and the test dedicated that it have good performance on bidirectional operation. It had high thrust weight ratio which is conducive to miniaturization.
Key words: single phase; piezoelectric; linear ultrasonic motor; bidirection move; miniaturization
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