中空环形行波超声波电机试验研究与改进设计

Experimental Study and Optimal Design of Hollow Ring Type Traveling Wave Ultrasonic Motor

设计了中空环形行波超声波电机的结构,并对定子进行了结构动力学分析,得到定子工作模态对应的共振频率及谐响应分析结果。根据所设计的电机结构尺寸制作了电机样机,并对样机进行了试验测试,得到定子阻抗-频率特性、定子在外加电压作用下的振动响应和电机的输出性能。针对所设计的中空超声波电机输出性能不理想的问题,对定转子的结构和支撑方式进行了改进设计以改善电机性能。试验测试结果表明,改进后的电机克服了原有样机存在的问题,输出性能得到明显改善。

The structure of a hollow ring type traveling wave ultrasonic motor was designed. The structural dynamics of the stator was analyzed and the resonance frequency of the stator working mode as well as the harmonic response of the stator was observed. A prototype machine was manufacutured according to the designed motor dimension. Experimental study on the motor was then conducted. The impedance-frequency characteristics, the forced response of the stator under applied voltage, and the output performance of the motor were obtained. Aiming at the problems existing in the designed hollow ultrasonic motor, the stuructures and the supportig way of the stator and the rotor were improved in order to optimize the motor performance. The experimental results indicated that the problems existing in the original prototype were overcome and the performance of the motor was improved significantly.