高压型两相混合式步进电机驱动器设计

介绍了设计一款基于AT89C2051单片机和功率驱动芯片IR2013的两相混合式步进电机细分驱动器,通过分析两相步进电机运行特性及细分驱动原理,采用了电流跟踪型PWM控制技术。该方案能明显提高步进电动机的运行精度,改善低频振荡的现象,可实现细分级别的任意设置,能根据不同应用场合使用不同细分数来驱动步进电机。     

GPS接收机天线相位中心偏差检测自动转动装置

为解决GPS接收机天线相位中心偏差检测效率低下的问题,研制了一套基于PLC控制的自动转动装置及观测数据分割软件。该装置包括由步进电动机带动的可旋转基座、控制其运转的PLC控制器、装置电源及GPS接收机电源。步进电动机通过2个齿轮的减速,提供较大扭矩,带动基座旋转部分绕中心轴旋转,保证了旋转过程的同轴度。PLC通过编程线下载电脑中编好的程序,连接驱动器和步进电动机,控制电动机的转速和转动角度。该装置替代人工对基座旋转,旋转角度和时间精确可控,观测期间无需人员操作,实践表明减少了人为因素干扰并提高了工作效率。     

轮式机器人结构与控制设计

采用了“DSP＋ARM”的双核控制方式。DSP主要负责知觉处理,ARM主要负责控制执行器。通过ARM控制驱动器,从而带动步进电动机。通过控制电机的转速和方式,达到不同的运动效果。     

PSOC实现电机转速的检测与控制

超声波电动机是近年来发展起来的一种新型电机,它的发展和应用离不开超声波电动机的驱动控制技术,并且在很大程度上驱动器的性能决定了超声波电动机的性能。PSOC(Programmable System-on-Chip)是一款单片片上功率系统,包含丰富的可编程模拟模块,还有专为触摸设计的CapSense模块,内置微处理器和数字模拟外设,是具有真正混合信号处理能力的可编程片上系统。本文主要介绍了PSOC技术在行波型旋转超声波电动机驱动的直线位移机构步进运动控制系统中的应用。     

新型纳米分辨率位移定位平移台的研制

为克服已有压电驱动器存在的结构及控制系统复杂、定位行程小等缺陷,利用压电陶瓷的逆压电效应设计并制作了一种新型的压电纳米步进驱动器,建立光栅测试系统对这种压电驱动器的动态性能进行了测试.将压电纳米步进驱动器与电磁伺服马达耦合,设计新颖驱动结构,利用微机通过步进运动控制卡统一控制,实现大范围一维纳米分辨率位移定位.系统样机解决了所研制压电纳米步进驱动器双向运动、实用定位等问题.位移定位分辨率为50 nm,定位行程为100mm,纳米分辨率定位最大速度为0.6 mm/s.     

步进电动机的控制

本文阐述了步进电动机的工作原理;步进电动机的控制方式:数字电路、单片机及PLC的控制。     

基于L297/298步进电机工作模式的单片机接口

作为混合式步进电机的驱动器,基于1297/298驱动芯片的组合是较为常见的一种.本文较为详细论述了基于该种驱动器下混合式步进电机的三种工作模式,给出了相应的单片机接口方案.     

微机控制步进伺服电机系统设计

本文设计了单片机控制步进电机伺服系统的硬件电路和软件系统,实现步进电动机的点动与定动两种运行模式。同时通过键盘输入各项参数,在显示器上对输入的参数进行显示,通过加减速控制达到精确定位的目的,最终达到了利用微机来控制步进电动机的目的,实现了步进电动机的单片机自动控制。     

基于西门子PLC的步进电动机控制技术

步进电动机的转速、位移和转向是受绕组的电脉冲的频率、个数和通电顺序决定的，西门子s7—200Nt以上PLC内置了脉冲输出功能，可以通过编程来设置控制字和参数，实现对输出脉冲的控制，从而实现对步进电动机的控制。     

基于LabVIEW的步进电动机扭矩测试系统

扭矩是步进电动机的一项重要性能指标.介绍了一套自行研制的基于LabVIEW的扭矩测试系统.该系统利用虚拟仪器技术实现了步进电动机驱动电压和绕组电流的多通道同步数据采集和分析处理,并在此基础上判别驱动电路和步进电动机的运行状态,根据这些状态判断扭矩测量值是否可信.利用该系统,在不同条件下对步进电动机的扭矩进行测量,为步进电动机的工程应用提供了有价值的参考.实践证明,该系统是一套高效率的、高精度的扭矩测试系统.     

基于单片机的改进型五相混合式步进电机驱动器设计

在高性能纺织机械尤其是电脑绣花机中,步进电机是广泛应用的执行部件.电脑绣花机系统中现有五相混
合式步进电机驱动器存在诸多不足之处低频转矩振荡、高频输出转矩不足和多电源供电等.在分析现有步进电机
驱动器的基础上,结合理论分析,设计出一种基于单片机的改进型五相混合式步进电机W动器.该驱动器使用单一
电源供电,采用三相励磁PWM输出方式,改善了驱动的矩频特性,在电脑绣花机系统中投人应用取得良好效果.     

基于上位机与MCS-51单片机的X-Y轴定位驱动系统

X-Y轴系统作为一种二维的驱动系统,在现实中应用广泛.本文主要介绍本系统的原理及实现,其中重点在于步进电机的驱动电路硬件与控制软件的设计,以及上下位机串口通信的实现.     

基于光栅信号的步进电机速度控制

在分析步进电机运行特性的基础上 ,讨论了步进电机运行时高速失步和低速波动的原因及其对策 ,研究了转换角和超前角在步进电机速度控制中的作用 ,采用改变光栅反馈脉冲当量角及延时调整转换角的方法进行速度的平稳调节 ,并给出了速度控制方案及其实现     

步进电机定子内孔自动冲洗系统

研制了一种步进电机定子内孔自动冲洗系统,设计并分析了其主要机械系统及机构——包括自动进料机构、自动推进机构和自动冲洗机构.该系统可以对步进电机定子内孔在加工完毕后留下的铁屑及其它杂质进行冲洗,从而大大提高了劳动效率,减少了工人的劳动强度.该步进电机定子内孔自动清洗系统已经在步进电机制造企业得到了应用.     

Control of stepping velocity in a single insect leg during walking

In the single middle leg preparation of the stick insect walking on a treadmill, the activity of flexor and extensor tibiae motor neurons and muscles, which are responsible for the movement of the tibia in stance and swing phases, respectively, was investigated with respect to changes in stepping velocity. Changes in stepping velocity were correlated with cycle period. There was a close correlation of flexor motor neuron activity (stance phase) with stepping velocity, but the duration and activation of extensor motor neurons (swing phase) was not altered. The depolarization of flexor motor neurons showed two components. At all step velocities, a stereotypic initial depolarization was generated at the beginning of stance phase activity. A subsequent larger depolarization and activation was tightly linked to belt velocity, i.e. it occurred earlier and with larger amplitude during fast steps compared with slow steps. Alterations in a tonic background excitation appear not to play a role in controlling the motor neuron activity for changes in stepping velocity. Our results indicate that in the single insect leg during walking, mechanisms for altering stepping velocity become effective only during an already ongoing stance phase motor output. We discuss the putative mechanisms involved.     

步进电机在数控切纸机中的应用

介绍步进电机在数控切纸机的应用及步进电机升降速的实现的原理。     

基于随动测量系统的步进电机跟踪精度研究

利用ARM控制系统实现齿轮测量仪的两轴随动控制,完成齿轮螺旋线高精度测量.根据步进电机脉冲信号和步距角的线性关系,采用ARM系统输出频率脉冲控制步进电机,由于步进电机只有周期误差而无累积误差,系统能够实现齿轮螺旋线偏差快速、准确测量.与现有系统比较,本系统具有控制精度高、测量速度快、误差精度高的特点,能够实时、动态显示测量误差.     

A superconducting stepping motor with pulsed-field magnetization for a pump

Pulsed-field magnetization is applied to a superconducting stepping motor to improve its rotor dynamics. The superconducting motor is composed of a superconducting rotor, a stator with eight electromagnets, a computer and a pulsed-power supply. Pulsed-field is applied to the superconducting rotor before the rotation. Moreover, the superconducting stepping motor is then applied to a pump that can function at extremely low temperatures. Pulsed-field magnetization is also applied to the pump motor in order to improve the performance of the pump. The static and dynamic characteristics of the motor and the pump are discussed.     

Ultrasonic stepping motor using spatially shifted standingvibrations

This paper proposes a novel configuration of ultrasonic stepping motor. It is based on the simple phenomena that an object on a vibrating body moves to the nodal position of the vibration mode and rests there. The use of standing flexural vibrations of a ring simplifies both the structure of the motor itself and the driving circuit. To move the nodal point, several standing modes spatially shifted with respect to each other are excited one after another by switching the driving position on the stator ring at the timing of stepping clock. In this paper, a 60-step stepping motor is designed and fabricated for trial, where an optimum combination of the order of the mode used and the number of the spatial phase shifts is discussed. The basic characteristics of the prototype motor is also studied experimentally     

Stepping-Motor-Driven Constant-Shear-Rate Rotating Viscometer

Despite the frequent use of stepping motors in robotics, automation, and a variety of precision instruments, they can hardly be found in rotational viscometers. This paper proposes the use of a stepping motor to drive a conventional constant-shear-rate laboratory rotational viscometer to avoid the use of velocity sensor and gearbox and, thus, simplify the instrument design. To investigate this driving technique, a commercial rotating viscometer has been adapted to be driven by a bipolar stepping motor, which is controlled via a personal computer. Special circuitry has been added to microstep the stepping motor at selectable step sizes and to condition the torque signal. Tests have been carried out using the prototype to produce flow curves for two standard Newtonian fluids (920 and 12560 mPa middot s, both at 25degC). The flow curves have been obtained by employing several distinct microstep sizes within the shear rate range of 50-500 s^-1 . The results indicate the feasibility of the proposed driving technique.