首页 | 本学科首页   官方微博 | 高级检索  
相似文献
 共查询到17条相似文献,搜索用时 109 毫秒
1.
压电陶瓷超声波马达   总被引:2,自引:0,他引:2  
褚祥诚  李龙土 《物理》2002,31(4):229-234
压电陶瓷超声波马达是利用压电陶瓷材料激发超声波实现驱动的一种新型电机,同传统的电磁马达和静电马达比较,它具有低速下大力矩输出、无电磁干扰、静音操作、保持力矩大、响应速度快、结构简单等特点.在国外,它已经在精密仪器、航天航空、自动控制、办公自动化、微型机械系统、微装配、精密定位等领域得到了实际应用.文章系统地总结了压电陶瓷声马达的特点,简略介绍了国内外相关技术的发展情况及前沿性研究方向,并提出进一步开发研究的几点建议,希望会对我国压电陶瓷声马达的研究以及相应产品的开发起到积极的促进作用.  相似文献   

2.
研制出一种以长条片关压电陶瓷振子作煊子的驻波型超声马达,该马达具有整体结构简单,易于制作与调整、驱动电路合理、运行稳定的特点;由实验研究,测出了其主要性能参数,利用该马达已开发出特性优异的超声步进马达及时钟模型,小型走纸机。  相似文献   

3.
《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   

4.
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   

5.
吴金根  高翔宇  陈建国  王春明  张树君  董蜀湘 《物理学报》2018,67(20):207701-207701
作为重要的功能材料,压电材料已经在国民经济的多个领域里有着重要应用.随着现代工业的快速发展,特别是新能源、交通和国防工业的高速发展,功能材料的应用已经从常规使用转向极端环境下的服役.本文综述了具有高居里点的压电材料,包括钙钛矿型压电陶瓷、铋层状结构氧化物压电陶瓷、钨青铜结构压电陶瓷以及非铁电压电单晶等;介绍了其晶体结构特征和高温压电性能、最新研究进展,并列举了一系列的高温压电器件和应用,包括高温压电探测器、传感器、换能器和驱动器等.另外,本文总结了高温压电材料的热点研究问题,并展望了今后的发展方向.  相似文献   

6.
 超声波电机(Ultrasonic Motor,USM )是国外近20年发展起来的一种新型电机。事实上,在超声波电机问世之前,已有以压电效应进行驱动的电机,但其频率并不局限于超声波范围内。早在1984年,威廉和布朗就申请了“压电马达”的美国的专利;1964年,前苏联基辅理工学院设计了第一个压电旋转电机;1970~1972年西门子和松下发明了压电步进电机,不过因为无法达到较大的输出转矩而没能实际应用。1980年日本指田年生研制成超声波压电电动机(即现代意义上的超声波电动机),克服了传统压电电动机转换效率低和变位微小的缺陷,使压电电动机进入工业实用阶段。  相似文献   

7.
利用压电陶瓷元件具有良好声电转换特性和输出特性,本文提出了一种新型结构的压电超声波物料输送器。设计了超声波物料输送器的结构并分析了其工作原理,采用纵扭复合型压电换能器为驱动源,对压电换能器进行了结构设计和参数计算,并对其进行了性能测试。由此研制出了压电超声波输送器的样机并进行了试验测试,结果表明:当频率为17.9 kHz–18.6 kHz时,输送器具有输送物料能力。驱动负载为1.5 kg时系统的谐振频率为18.3 kHz,输送速度最快,达到64个/min。随着电源输出功率的增大输送物料速度呈线性增加。该输送器的稳定性好,噪声低。与压电片式和电磁式输送器噪声进行对比,超声波输送器的工作噪声仅为31 dB,略小于压电片式,远小于电磁式。  相似文献   

8.
徐开兴 《应用声学》1992,11(1):48-46
扬声器用的压电陶瓷具有阻抗低、电声转换效率高,Q_m值低的特点。它是在PZT中加入镧(La)等添加物,虽然居里温度被降到180℃左右,但是获得了介电常数5000、压电常数(d_(31))310×10~(-12)m/V、Q_m50左右的软性压电陶瓷。 最近,随着流延法技术的成熟,采用流延法批量生  相似文献   

9.
王晨青  马建敏 《应用声学》2023,42(6):1139-1147
在Guyomar非线性模型基础上,通过机电等效法将晶堆前向负载作为等效质量和阻尼加入振动方程的质量项和阻尼项,推导了换能器振速、辐射声压级和谐振频率偏移率等表达式,计算分析了压电陶瓷非线性参数和结构参数对换能器声辐射性能的影响,研究了压电陶瓷的非线性对换能器结构参数匹配的影响。结果表明,换能器节面靠前,前盖板厚度越小,前盖板大径越小,都可以减少压电陶瓷非线性引起的换能器频率偏移。当设计频率确定时,压电陶瓷处于非线性工作域的换能器的结构参数有所减小。换能器加入辐射端匹配后,可以改善压电晶堆前向负载匹配,降低换能器的谐振频率偏移率。换能器激励电流也会出现频率偏移现象。在提高换能器激励电压时,换能器的结构参数应适当减小。得到的结论可为换能器设计提供理论依据和帮助。  相似文献   

10.
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   

11.
Sun Z  Xing R  Zhao C  Huang W 《Ultrasonics》2007,46(4):303-312
A three-joint robot is directly driven by ultrasonic motors with advantage of high torque at low speed. The speed of the ultrasonic motors is actually controlled by regulating their operating frequencies. The kinematic and kinetic analyses of the robot have been carried out using Adams. Due to the lack of accurate control model of ultrasonic motors and the time-varying motor parameters, a fuzzy auto-tuning proportional integral derivative (PID) controller for the robot is experimented, in which a simple method to tune parameters of the PID type fuzzy controller on-line is developed and a new position–speed feedback strategy is proposed and implemented. The effectiveness of the proposed control strategy and fuzzy logic controller is verified by experimental investigation.  相似文献   

12.
Mracek M  Hemsel T 《Ultrasonics》2006,44(Z1):e597-e602
Rotary ultrasonic motors have found broad industrial application in camera lens drives and other systems. Linear ultrasonic motors in contrast have only found limited applications. The main reason for the limited range of application of these very attractive devices seems to be their small force and power range. Attempts to build linear ultrasonic motors for high forces and high power applications have not been truly successful yet. To achieve larger force and higher power, multiple miniaturized motors can be combined. This approach, however, is not as simple as it appears at first glance. The electromechanical behaviour of the individual motors differs slightly due to manufacturing and assembly tolerances. The individual motor characteristics are strongly dependent on the driving parameters (frequency, voltage, temperature, pre-stress, etc.) and the driven load and the collective behaviour of the swarm of motors is not just the linear superposition of the individual drive's forces. Thus, the bundle of motors has to be synchronized and controlled appropriately in order to obtain an optimized drive that is not oversized and costly. We have investigated driving and control strategies of a set of linear ultrasonic motors. Our contribution will be divided into three main parts. In part I ultrasonic linear motors will be introduced. In part II driving strategies for a single motor as well as for a bundle of motors will be presented. These concepts will be verified by simulation results and experimental data. In part III a simplified model for the motor's electromechanical behaviour will be given.  相似文献   

13.
本文在光栅卡尺技术和力矩电机技术的基础上,把卡尺量程扩大到20m作成卡卷尺。利用力矩电机作为卡卷尺的卷紧机构和利用力矩电机作为保证光栅编码器标尺光栅平直度的施力元件,在此基础上,发展了光栅卡卷尺测长技术。基于莫尔条纹技术的光栅卡尺测长技术与其它现有长度测量技术相比成本较低、性能可靠,其测量精度可达0.05mm甚至更高。为克服实际应用中卡卷尺的平直度对测量精度的影响,在系统设计中使力矩电机工作在堵转状态作为保证光栅卡卷尺标尺光栅平直的施力元件,并设计了线性调节的力距电机电源。对系统的检测表明,在20m测程内测量精度为0.1mm。  相似文献   

14.
Piezoelectric traveling wave rotary ultrasonic motors are motors that generate torque by using the friction force between a piezoelectric composite ring (or disk-shaped stator) and a metallic ring (or disk-shaped rotor) when a traveling wave is excited in the stator. The motor speed is proportional to the amplitude of the traveling wave and, in order to obtain large amplitudes, the stator is excited at frequencies close to its resonance frequency. This paper presents a non-empirical partial differential equations model for the stator, which is discretized using the finite volume method. The fundamental frequency of the discretized model is computed and compared to the experimentally-measured operating frequency of the stator of Shinsei USR60 piezoelectric motor.  相似文献   

15.
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   

16.
We describe an apparatus that can measure the instantaneous angular displacement and torque applied to a quartz particle which is angularly trapped. Torque is measured by detecting the change in angular momentum of the transmitted trap beam. The rotational Brownian motion of the trapped particle and its power spectral density are used to determine the angular trap stiffness. The apparatus features a feedback control that clamps torque or other rotational quantities. The torque sensitivity demonstrated is ideal for the study of known biological molecular motors.  相似文献   

17.
The article presents novel design of non-contact rotary ultrasonic motor consisting of ring-shaped stator vibrating in in-plane flexural mode and rotor provided with blades. In contrast to other motors with similar design proposed motor relies on the use of standing ultrasonic waves. This simplifies design and electronic control of motor and becomes possible due to introduction of artificial asymmetry, for example by tilting one or several blades of the rotor relative to the surface normal. Operating principle of the proposed motor is based on acoustic radiation torque exerted on rotor by ultrasonic waves propagating in air or fluid gap between rotor and stator. This torque is calculated using finite element method by means of COMSOL Multiphysics software. Dynamics of rotor is studied using MathCad software and general theory of nonlinear conservative oscillators. Role of asymmetry is explained on the basis of comparative analysis of potential functions and phase trajectories for symmetric and asymmetric cases. It is shown that direction of rotation is determined by structural parameters of motor, particularly tilting direction (clockwise or counter-clockwise) of the blades. Conceptual design of motor with bidirectional rotation is described. Direction and velocity of rotation in the proposed conceptual design can be potentially controlled by changing excitation frequency of stator.  相似文献   

设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号