摘要
为分析定转子间的接触对定子振动的影响,建立中空环形行波超声波电机定子振动解析模型。根据电机的结构特点,将定子等效为等厚度的圆环形梁,等效过程中,忽略定子齿的刚度,但将定子齿的质量等效到定子梁中,采用解析法建立等效定子梁的自由振动模型和受迫振动模型,得到定子不同振动模态对应的自由振动频率以及定子在外加激励电压和定转子间法向接触压力作用下的受迫振动响应。结果表明,定子等效处理的方法是合理的,电压激励和法向接触压力激励所产生的定子振幅分别与电压幅值和预压力大小呈正比关系,定转子间所施加的预压力较小,因此接触压力对定子振动的影响较小。将理论分析结果与实验测试结果进行比较,二者基本吻合,验证了所提出的解析模型的正确性。
An analytical model of the stator vibration in the hollow ring type traveling wave ultrasonic motor is proposed in order to investigate the impact of the contact between the stator and the rotor on the stator vibration. The stator is equivalent to a circular ring beam with constant thickness according to the structure of the motor. In the equivalent process,the stiffness of the stator teeth is neglected. But the mass contribution of the teeth is lumped into the mass of the stator beam. The free vibration and the forced vibration of the equivalent stator beam are then analyzed based on the analytical method. Different vibration modes and the corresponding frequencies are determined. The forced responses of the stator excited by the applied harmonic voltage and the normal contact force are obtained. The results indicate that the equivalent process is reasonable. The vibration amplitudes of the stator excited by the applied voltage and the normal contact force are linear to the voltage amplitude and the preload force,respectively. The impact of the contact force on the vibration of the stator is relatively small as the value of the preload force is low. The analytical results are compared with the experimental results and good agreements are observed,which verifies the validity of the proposed model.
出处
《电工技术学报》
EI
CSCD
北大核心
2015年第7期112-118,共7页
Transactions of China Electrotechnical Society
基金
国家自然科学基金(51177014)
江苏省自然科学基金(BK20140766)
江苏省高校自然科学研究项目(14KJD470004)
南京工程学院校级科研基金(YKJ201317)资助项目
关键词
超声波电机
定子振动
解析模型
接触压力
Ultrasonic motor,stator vibration,analytical model,contact force
