【摘要】 提出了一种直接测量行波超声马达定子和转子接触状态的方法—电接触法。利用这种方法研究了接触预压力和定子激励电压(定子振幅)对定子和转子接触状态的影响。借助于自制的超声马达摩擦特性模拟实验装置,测量了超声马达堵转力矩和空载转速随接触预压力和定子激励电压的变化。提出用相对接触长度描述定子和转子的接触特性,建市了超声马达特性与定子和转子相对接触长度的联系。此外,还利用现有的行波超声马达定子和转子接触理论模型,计算了给定工作条件下接触区长度,并与实验结果进行了比较。研究结果可为行波超声马达的设计提供理论指导。更多还原

【Abstract】 An electric contact method to measure contact state of stator and rotor in traveling wave type ultrasonic motor(TWUSM) is presented. The effects of preload and exciting voltage (amplitude) of stator on contact state between stator and rotor are studied with this method. By a simulated tester of friction properties of TWUSM, the variations of stalling torque and no-load speed of TWUSM against the preload and the exciting voltage have been measured. The relative contact length that describes the contact characteristic of stator and rotor is proposed. The relation between the properties of TWUSM and the contact state of stator and rotor are presented. Additionally, according to a theoretical contact model of stator and rotor in TWUSM, the contact lengths in given condition are calculated and compared with the experimental results. The result can provide theoretical guidance for design of TWUSM.更多还原