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首页> 外文期刊>IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control >Force transfer model and characteristics of hybrid transducer type ultrasonic motors
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Force transfer model and characteristics of hybrid transducer type ultrasonic motors

机译：混合换能器式超声波电动机的力传递模型和特性

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摘要

The characteristics of longitudinal-torsional hybrid transducer-type ultrasonic motors (HTUSM) are low speed and high torque. The discontinuous-surface-contact mode between the stator and the rotor is different from the many-point-contact mode of traveling wave motors, which is also an essential cause for high torque. Therefore, it is important to analyze its force transfer model between the rotor and the stator. In this paper, issues of using the method of equivalent circuit model are addressed. The relationships between the contact angle, preload, and physical parameters of frictional materials are given, according to the impulse conservation law axially. The equations describing output torque, amplitudes of longitudinal and torsional. vibration, and parameters of the rotor are derived according to the principle that the work done by the load is equal to that by the driving force in one vibrating cycle. All factors that influence the mechanical characteristics are analyzed, and accuracy arid suitability of the force transfer model are verified by comparison with the prototype motor. The formula for transfer efficiency on the stator/rotor interface is given, and the low-efficiency of this type motor is explained. The wide-working frequency range property of this type motor is shown with experimental results. Based on this study, the parameters of the rotor and preload are determined. The maximum torque of the prototype motor is up to 13.2 nm, and no-load speed of this type of motor is 12.5 rpm.
机译：纵向扭转混合换能器型超声波电动机（HTUSM）的特点是低速和高转矩。定子和转子之间的不连续表面接触模式不同于行波电机的多点接触模式，这也是产生高转矩的根本原因。因此，分析其在转子和定子之间的力传递模型很重要。在本文中，解决了使用等效电路模型方法的问题。根据轴向冲量守恒定律，给出了摩擦材料的接触角，预紧力和物理参数之间的关系。这些方程式描述了输出转矩，纵向和扭转幅度。在一个振动周期中，根据负载得出的功等于驱动力得出的功，得出转子的振动和转子参数。分析了所有影响机械特性的因素，并通过与原型电动机进行比较，验证了力传递模型的准确性和适用性。给出了定子/转子界面上传递效率的公式，并解释了这种电动机的低效率。实验结果表明了这种电动机的宽工作频率范围特性。基于这项研究，确定了转子和预紧力的参数。原型电动机的最大扭矩高达13.2 nm，此类电动机的空载速度为12.5 rpm。

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