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1.
压电超声马达简介   总被引:5,自引:0,他引:5  
周铁英  董蜀湘 《物理》1991,20(5):298-302
近年来压电超声马达很引入注目.传统的马达是利用电磁力驱动的,而压电超声马达则是利用压电或电致伸缩材料作为驱动源,直接推动可运动的部件产生直线的或旋转的运动.本义重点介绍压电蠕动马达和超声行波马达的原理和简单结构.  相似文献   

2.
超声马达实验   总被引:3,自引:0,他引:3  
本文介绍超声马达实验的原理和方法,用常规仪器测量并绘制导纳圆图、测量自制超马马达的输入功率和输出力矩。  相似文献   

3.
超声波马达的应用   总被引:3,自引:0,他引:3       下载免费PDF全文
超声马达具有诸多优良特性,它已经在很多领域得到了广泛的应用。本文介绍了超声马达的应用现状和发展前景。  相似文献   

4.
本文研究了一种利用一阶纵振动和二阶弯曲振动的弯纵直线超声马达,采用加粗两端金属块的方法达到频率简并。实验测量得出一阶纵振动为36.6kHz,二阶弯曲振动频率为37.3kHz。利用该马达设计研制了一套驱动装置,经实验测得,当马达的预压力14.3N时,该装置无承载且无负载速度大于6cm/s;该装置承载196N的重物且负载l-2kgf时,仍能正常运行。  相似文献   

5.
本文从纵扭振动换能器理论出发,计算了一种新的复合换能器型超声马达,并进行了实验研究,测出了其主要性能参数。  相似文献   

6.
直线超声马达实验   总被引:2,自引:0,他引:2  
本文介绍了直线超声马达的结构,原理和实验内容。  相似文献   

7.
《应用声学》1999,18(2)
基于最新参考文献与INTERNET网络查询,本文提出超声马达或压电驱动器在我国科技领域最新的研究成果及其未来走向。其中,能够引起研究人员兴趣的尖端性领域包括超声马达的微型化;具有多个自由度的压电驱动器;具有新颖结构的压电驱动器;超声马达的振动实验测试;高分辨率的压电驱动器;超声马达的使用寿命;超声马达的动力学模型等。  相似文献   

8.
超声波马达的发展──国内最新动态   总被引:16,自引:0,他引:16       下载免费PDF全文
基于最新参考文献与INTERNET网络查询,本文提出超声马达或压电驱动器在我国科技领域最新的研究成果及其未来走向。其中,能够引起研究人员兴趣的尖端性领域包括;超声马达的微型化;具有多个自由度的压电驱动器;具有新颖结构的压电驱动器;超声马达的振动实验测试;高分辨率的压电驱动器;超声马达的使用寿命;超声马达的动力学模型等。  相似文献   

9.
为测量超声马达的一些特性,如最大力矩、负载特性(即力矩-速度特性)、转子和定子接触面上的摩擦系数等,本文提出一种由瞬态响应来估算的方法,由接通电源时马达转速阶跃响应的上开曲线可算出其负载特性,而由切断电源时的下降曲线得出接触面的摩擦系数。本方法测量时间快,故不受因温升导致的共振频率漂移等一些问题的困扰。对一混合换能器型旋转马达得到的负载特性与用拉重法所得结果符合很好。对一行波直线马达则考察了摩擦材料的杨氏模量和摩擦系数等参数对马达性能的影响。  相似文献   

10.
严仁博 《应用声学》1992,11(1):39-41,49
本文简要介绍超声马达的工作原理和特点,及其发展现状和应用前景,指出为提高超声马达所需要研究和解决的问题,介绍了按定子振动激发方法的分类方法,例举几种研究较多的超声马达,并说明其各自的特点。  相似文献   

11.
Snitka V 《Ultrasonics》2000,38(1-8):20-25
This paper deals with ultrasonic motors based on bimodal plate vibrations and their application to nanometre resolution stepper positioning systems. The concept of a linear ultrasonic motor drive capable of nanometric steps, long-range travel and reversible controlled motion is presented. The motor concept developed is based on the superposition of a longitudinal and bending vibrations of a rectangular resonator. The ultrasonic motor model based on system identification via discrete observations and prediction has been developed for control applications. The control algorithm for ultrasonic motors has been developed and theoretical investigations have been made. The open loop positioning system with designed stepper ultrasonic drive produced 10 nm resolution and 5% displacement repeatability. The system with computer controlled position feedback has shown 0.3 micron positioning accuracy over the 100 mm positioning range.  相似文献   

12.
A novel linear ultrasonic motor based on in-plane longitudinal and bending mode vibration is presented in this paper. The stator of the motor is composed of a metal plate and eight piezoelectric ceramic patches. There are four long holes in the plate, designed for consideration of the longitudinal and bending mode coupling. The corresponding model is developed to optimize the mechanical and electrical coupling of the stator, which causes an ellipse motion at the contact tip of the stator when the composite vibrations with longitudinal and bending are excited. Its harmonic and transient responses are simulated and inspected. A prototype based on the model is fabricated and used to conduct experiments. Results show that the amplitude of the stator’s contact tips is significantly increased, which helps to amplify the driving force and speed of the motor. It is therefore feasible to implement effective linear movement using the developed prototype.  相似文献   

13.
Yen CY  Wen FL  Ouyang M 《Ultrasonics》2003,41(6):451-463
Design and performance evaluation of an ultrasonic motor was discussed in [Wen et al., Thin-disc piezoelectric ultrasonic motor. Part I: design and performance evaluation, Ultrasonics]. Higher precision position control of piezoceramic ultrasonic motor depends on mechanical design and servo control of a very precise and adequate metrology. This paper proposes the design of a driving circuit and controller to deal with non-linearities behavior in the model of piezoceramic-driving ultrasonic motor. The performance of the driver and the effectiveness of the proposed controller are demonstrated by command inputs of sinusoidal and step signals. For comparison purpose, the ultrasonic motor is controlled using two methods: i.e., proportional-integral-derivative (PID) and sliding-mode control (SMC). It was proven that SMC would compensate automatically for unmodeled behaviors such as piezoceramic non-linearities and mechanical stick-slip phenomena. Furthermore, SMC scheme has been successfully applied to position tracking to demonstrate the excellent robust performance in noise rejection.  相似文献   

14.
In general, the design and analysis of ultrasonic motor and motor’s control strategy are based on mathematical model. The academic model is widely used in the analysis of traveling wave ultrasonic motor (TWUSM). But the dispersive characteristic of piezoelectric ceramics and other complicated process, such as the friction, make the model’s precision not so accurate. On the other hand, identification modeling method, which is built based on the tested data, has obtained increasing application in the study of ultrasonic motor’s control technology. Based on the identification model, many control strategies can be designed easily. But the identification model is an approximate model, so if a more accurate model of ultrasonic motor can be obtained, the analysis and design of motor control system will be more effective. Characteristic model is a kind of identification model which can accurately describe the characteristics of TWUSM. Based on the tested data, this paper proposes the modeling method of ultrasonic motor’s characteristic model. The paper also makes a comparison of the effectiveness of different identification algorithms. Aiming at the speed control of ultrasonic motor, the influence of the parameter’s initial values on the precision of model is discussed. The calculating results indicate the availability of this characteristic model.  相似文献   

15.
Integration of a piezoelectric transformer and an ultrasonic motor   总被引:3,自引:0,他引:3  
Ultrasonic motors are usually operated at an AC voltage higher than a regular battery. This implies the need of a voltage step-up transformer. In this paper, we report the integration of a piezoelectric transformer (PT) with an ultrasonic motor and a simple drive circuit. The stator of the ultrasonic motor and the PT were operated in the same radial vibration mode. Their dimensions were very close to each other yielding nearly matching resonance frequencies. Consequently, they could be combined together without inductor. The drive circuit was designed by using a 555 timer as an astable multivibrator, and high-speed dual MOSFET drivers as a class D half-bridge switching amplifier. This integrated PT-ultrasonic motor performed reasonably without the use of electromagnetic transformer or inductor.  相似文献   

16.
Chen Y  Liu QL  Zhou TY 《Ultrasonics》2006,44(Z1):e581-e584
A traveling wave ultrasonic motor of high torque with a new configuration is proposed in this paper. In the new design, a part of the motor serves as the stator. The rotor is the vibrator consisting of a toothed metal ring with piezoelectric ceramic bonded, which generates ultrasonic vibration. The rotor is in contact with the shell of motor and is driven by the friction between the rotor and the stator. This configuration not only removes the rotor in a conventional type of traveling wave ultrasonic motor but also changes the interaction between the rotor and the stator of the motor so that it improves the output performance of the motor. Although an electric brush is added to the ultrasonic motor, it is easy to be fabricated because of the low speed of motor. The finite element method was used to compute the vibration modes of an ultrasonic motor with a diameter of 100mm to optimize the design of the motor. A 9th mode was chosen as the operation mode with a resonance frequency about 25 kHz. According to the design, a prototype was fabricated. Its performance was measured. The rotation speed-torque curves for various frequencies were obtained. The result shows that its stall torque is greater than 4 Nm within a range of 400 Hz. This ultrasonic motor was used to drive the window glass of a mobile car and the result was satisfactory. In the further the research on the friction material between the stator and the rotor is under way to improve the efficiency of the ultrasonic motor.  相似文献   

17.
We have developed an ultrasonic micro-motor for use as a micro-actuator in place of an electromagnetic motor. This ultrasonic micro-motor, which can be driven by a single signal and in which the change of the direction of the rotor movement can be made easily by selecting the electrode to apply the driving signal, can easily construct a self-oscillating circuit and simplify the driving circuit. We have also simplified the motor structure, which is easy to miniaturize and mass-produce. We applied a version of this motor with a diameter of 8 mm to a vibration alarm, and one with a diameter of 4.5 mm to a driving source of a calendar mechanism in a watch. This ultrasonic micro-motor is expected to be of use as a new driving source in a broad range of fields.  相似文献   

18.
大力矩超声电机   总被引:4,自引:0,他引:4       下载免费PDF全文
杨淇  杨明  阙沛文 《应用声学》2001,20(3):34-37
本文综述了大力矩超声电机的应用和研究现状,分析了国内外大力矩超声电机实现的关键问题,展望了大力矩超声电机的应用前景。  相似文献   

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