Ming Y, Peiwen Q
Department of Instrumentation, Shanghai Jiao Tong University, People's Republic of China.
Ultrasonics. 2001 Mar;39(2):115-20. doi: 10.1016/s0041-624x(00)00053-6.
The understanding of ultrasonic motor performances as a function of input parameters, such as the voltage amplitude, driving frequency, the preload on the rotor, is a key to many applications and control of ultrasonic motor. This paper presents performances estimation of the piezoelectric rotary traveling wave ultrasonic motor as a function of input voltage amplitude and driving frequency and preload. The Love equation is used to derive the traveling wave amplitude on the stator surface. With the contact model of the distributed spring-rigid body between the stator and rotor, a two-dimension analytical model of the rotary traveling wave ultrasonic motor is constructed. Then the performances of stead rotation speed and stall torque are deduced. With MATLAB computational language and iteration algorithm, we estimate the performances of rotation speed and stall torque versus input parameters respectively. The same experiments are completed with the optoelectronic tachometer and stand weight. Both estimation and experiment results reveal the pattern of performance variation as a function of its input parameters.
理解超声电机的性能如何随输入参数（如电压幅值、驱动频率、转子上的预载）而变化，是超声电机众多应用和控制的关键。本文给出了压电旋转行波超声电机的性能估计，该估计是输入电压幅值、驱动频率和预载的函数。利用洛夫方程推导定子表面的行波幅值。基于定子与转子间分布弹簧刚体的接触模型，构建了旋转行波超声电机的二维解析模型。进而推导出稳定转速和堵转转矩的性能。利用MATLAB计算语言和迭代算法，分别估计了转速和堵转转矩随输入参数的性能。使用光电转速计和标准砝码完成了相同的实验。估计结果和实验结果均揭示了性能随其输入参数变化的规律。
