一种高压断路器伺服控制器设计方案

为进一步提升高压断路器智能化水平,在高压断路器电机直驱机构研究的基础上,分析了永磁体尺寸对电机性能的影响,设计了电机直驱高压断路器伺服控制系统.其伺服控制器硬件系统包含功率变换模块、转子位置检测模块、电压及电流采样模块以及通信模块等,同时,基于此硬件系统设计实现了各模块之间的信息交互以及系统控制的软件系统.搭建伺服控制...     

用于无刷及感应电机的伺服系统

Centurion系列是一种新的模块化的小型数字无刷交流伺服控制器和电机,1990年4月3～5日在Boston Mass运动控制技术会议和展览上作了介绍。该系列由Centuion DS100和DS200伺服控制器、SSM无刷交流伺服电动机、ISM无刷交流感应主轴电机以及AC100运动控制器组成。 DS100和DS200伺服控制器包括带有正弦脉宽调制的16位微处理器控制电路。DS100是不受操作系统控制的单轴模块,因而要求有单相输入功率模块,DS200是模块化共用功率电源系统程序包,每块功率电源模块允许有六块以上驱动模块。 SSM电机以三相绕组、正弦换向、高温保护为代表,速度环和位置环反馈由增量光学编码器提供,通过高温/振动障碍架连接到电机上。     

同步伺服驱动系统的全数字位置反馈控制

本文介绍了同步伺服驱动的全数字控制原理,硬件部分由PWM逆变器和有用状态值测量与设守值输出的外围设备的微控制器所组成,推导出稀土PM同步电机伺服驱动的数字模型.介绍了一种新型的串级状态反馈控制器,该控制器由一个具有电流控制内环的位置状态反馈控制器构成,对两种不同类型的电流控制器进行比较.     

专利快讯

双层双面平面微线圈制作；应用于伺服系统的强健性电流回路控制器；基于脉宽调制方式的多变量超声波电机伺服控制器；清洁机器人的自动充电系统及方法；内装驱动电路的伺服马达。     

基于DSP的大口径天文望远镜伺服控制的设计与实现

大口径天文望远镜不仅聚光能力增强,且分辨能力也提高。天文望远镜是光、机、电多学科交叉的系统工程,其伺服控制系统的精度对整个望远镜的系统性能起到重要的作用。该文根据天文望远镜跟踪目标的特点,采用直接驱动控制技术,开发了新型的DSP的数字控制平台。DSP数字控制器系统完成伺服驱动电机的矢量控制,该系统能够满足大口径天文望远镜高精度跟踪,并满足天文观测的精密、宽调速参数要求。试验结果表明该系统控制器稳定性好、可靠性高,其控制精度达到了预期的效果。     

多轴伺服控制器的片上系统设计

针对数字伺服控制算法及片上系统集成技术的问题,依据矢量控制和伺服系统设计理论,建立了磁场定向矢量控制器、速度控制器和位置控制器等高性能IP核模型,开发了坐标变换、速度测量、SVPWM、反时限保护、PID调节器、电子齿轮、前馈控制及滤波器等关键算法模块,详细规划了各模块的调度时序。在此基础上,进一步集成了RISC微处理器模块,并采用时分复用设计方法,在FPGA工艺平台中最终实现了多轴伺服控制器片上系统。实验结果表明,该芯片能够接收脉冲命令、模拟命令或数字命令,既可以工作在位置控制模式,也可以配置为速度伺服或力矩驱动模式,每个轴的运行是相对独立的,并且控制参数在线可编程。     

用PLC直接控制步进电机的方法研究

步进电机可编程控制器(PLC)直接控制,可使组合机床自动生产线控制系统的成本显著下降。文章介绍了用PLC控制步进电机驱动的数控滑台方法,伺服控制、驱动及接口及步进电机PLC控制的软件逻辑。     

一种针对高速开关磁阻电机数字控制器的研制

开关磁阻电机(SR电机)转子上无线圈和永磁体,较适合于高速运行.介绍一种针对高速开关磁阻电机的数字控制方法,设计了以C8051F120为控制核心的数字控制器,包括硬件和软件,实现了SR电机高速运行时的调角度控制和电流斩波控制(CCC)相结合的控制方法,实验结果表明该数字控制系统简单并具有优良的性能,达到了高速电机控制的运行要求.     

一种用于直接驱动机器人的变磁阻电机的控制

本文介绍了一种用干直接驱动机器人和工业自动化领域的高性能变磁阻电机的控制。整个控制系统由驱动单元和数字控制器组成,具有模拟速度闭环控制和数字位置闭环控制两种功能。本文介绍了电机的电流、速度和位置控制。同时,为了用于直接驱动机器人,电机控制系统配备了完善的通讯接口。     

横向磁场直线开关磁阻电机及其控制系统

研究了基于横向磁场直线开关磁阻电机(transverse flux linear switched reluctance motor，TFLSRM)、全数字控制器与新型位置传感器的直线电机驱动系统，建立了TFLSRM数学模型。新型位置传感器利用了TFLSRM次极边极形，无需在次极安装任何元件，改善了系统可靠性。为改善系统性能，在电流环进行了从牵引力到平均电流的非线性转换，在速度环采用离散时间趋近率控制。基于DSP设计了控制器，测试了新型位置传感器与所提驱动系统的动、静态性能。实验结果验证了新型位置传感器与TFLSRM驱动系统的优良性能。     

基于自适应神经网络的PMLSM速度控制研究

针对永磁直线同步电机(PMLSM)直接驱动系统的非线性与电机参数时变、易受扰动的特性,提出一种基于BP神经网络的自适应神经网络速度控制器.该控制器由一个传统的PID位置控制器、神经网络控制器(NNC)和神经网络辨识器(NNM)组成.仿真结果表明,当突加负载扰动或参数突变时,系统具有较好的动态性能和较强的鲁棒性,能够满足工业场合高精度、微进给的需求.     

Microcontroller based digitally controlled ultrasonic motor drive system

Piezoelectric driven ultrasonic motors have been attracted as considerable actuators for the servo speed and position applications in recent years. These motors have important features and advantages to be preferred in the special movement applications. Ultrasonic motors have different operating principles and different drive and control systems than the electromagnetic motors. In this study, microcontroller based digitally controlled drive system has been proposed for a travelling-wave ultrasonic motor. Drive system includes power circuit, interface electronics circuits and microcontroller parts. Power circuit is combined from half-bridge serial-resonance inverter to provide highfrequency two-phase voltages. Interface circuits include gate drive, direction control, opto-coupler and filter circuits. Microcontroller is programmed to generate required digital control signals for overall control of the motor. Related to the reference speed, the microcontroller generates control signal resulting proper driving frequency. Consequently, the actual motor speed tracks the reference speed precisely. The speed feedback is taken from optical encoder and transmitted to the controller as digital speed and position signals. The developed drive system has been tested experimentally. The obtained results show the effectiveness and reliability of the proposed system. The microcontroller based drive system can be applied easily and successfully to the ultrasonic motor.     

Adaptive-backstepping-based design of a nonlinear position controller for an IPMSM servo drive

This paper presents the design of a novel nonlinear position controller for an interior permanent-magnet synchronous motor (IPMSM) servo drive. The motor model equations provide the basis for the proposed controller, which is designed with the adaptive backstepping technique. Various system uncertainties, particularly mechanical-parameter uncertainties, are incorporated in the design of the controller. Using Lyapunov's stability theory, it is verified that the control variables are asymptotically stable. The complete drive system is then simulated with MATLAB/Simulink software. Performance of the proposed adaptive-backstepping-based nonlinear position controller (ABNPC) is investigated under different dynamic operating conditions such as step changes in command positions, step changes in load, and parameter variations. The results indicate that the proposed ABNPC-based IPMSM drive could be a candidate for real-time industrial servo motor drive applications.     

全数字化无刷直流电机伺服控制系统设计

转矩波动是影响无刷直流电机伺服控制精度的重要因素,限制了无刷直流电机在控制性能要求较高场合的应用。针对此问题,在传统位置环和速度环的基础上,引入数字化电流环,通过电流闭环控制稳定电磁转矩,从而减小转矩脉动的干扰以提高控制精度。通过对系统模型的分析,确定控制系统参数,实现了以高性能的数字信号处理器DSP28335为核心的电机伺服控制系统软硬件设计。实验结果表明,引入数字电流环后,系统的跟踪精度得到了明显的提高（近9倍）,且系统的动态响应性能也得到了较好的改善。     

A digital signal processor based robust integral-proportional controller for an induction motor servo drive

A digital signal processor (DSP) based computer controlled indirect field oriented induction motor servo drive with robust control characteristics is proposed in this paper. First, the DSP based induction motor servo drive is implemented and the dynamic model of the system at the nominal condition is identified by a curve fitting technique. Based on this model, an integral-proportional controller is quantitatively designed to match the prescribed position tracking specifications. Then a simple robust controller is designed and augmented to reduce the performance degradation due to uncertainties.     

A Servo-Control System Using a Self-Controlled Synchronous Motor (SCSM) with Sliding Mode Controller

The application of sliding mode control for improving the dynamic response of a self-controlled synchronous motor (SCSM) based position servo system is presented. Sliding mode control gives fast dynamic response with no overshoot and zero steady-state error. It has the important feature of being highly robust, i.e., insensitive to plant parameter variations and external disturbances. A design procedure is outlined for the sliding mode controller for a servo driving using the self-controlled synchronous motor. A novel scheme for fast torque reversal is proposed and implemented. Digital computer simulation of the overall position control system is carried out using a time domain model in the d-q reference frame. The rigorous simulation of the servo system with sliding mode control shows the existence of limit cycles in the position response with certain type of speed encoder. Experimental results are provided for a 3-hp synchronous motor based servo drive. The sliding mode controller is implemented using a single-board microcomputer which controls a GTO thyristor current source inverter to drive the motor.     

Intelligent control of induction servo motor drive via wavelet neural network

This study presents an intelligent control system for an induction servo motor drive to track periodic commands using a wavelet neural network (WNN). With the field orientation mechanism, the dynamic behavior of the induction servo motor drive system is rather similar to a linear system. However, the uncertainties, such as mechanical parametric variation, external disturbance, unstructured uncertainty due to nonideal field orientation in transient state, and unmodelled dynamics in practical applications influence the control performance. Therefore, an intelligent control system that is an on-line trained WNN controller with adaptive learning rates is proposed to control the rotor position of the induction servo motor drive. The adaptive learning rates are derived in the sense of discrete-type Lyapunov stability theorem, so that the convergence of the tracking error can be guaranteed in the closed-loop system. In the whole design process, the strict constrained conditions and prior knowledge of the controlled plant are not necessary according to the powerful learning ability of the intelligent control system. With the proposed intelligent control system, the controlled induction servo motor drive possesses the advantages of good tracking control performance and robustness to uncertainties under wide operating ranges. The effectiveness of the proposed control scheme is verified by both simulated and experimental results.     

INVESTIGATIONS ON DYNAMIC BEHAVIOR OF PERMANENT MAGNET BRUSHLESS DC MOTOR DRIVE

ABSTRACT

Permanent magnet brushless dc (PMBLDC) motors are increasingly being used in a wide range of applications such as machine tools, robotics and high precision servo applications. A comprehensive analysis which includes modeling and simulation of PMBLDC motor drive is presented in this paper. A mathematical model of the drive is developed with a view to studying the transient response of current controlled voltage source inverter (VSI) fed PMBLDC motor. The drive system consists of discrete PID(Proportional, integral plus derivative) speed controller, the reference current generator, the position sensor, an inverter and the motor. Each part of the drive system is modeled separately and then integrated to study the dynamic behavior of the drive system. The study also examines the effectiveness of the drive system during starting, load perturbation, speed reversal and dc link voltage fluctuation.     

Anti‐windup algorithm with priority to proportional control output of speed PI controller for precision servo system

A robust servo system is important for performance improvement of motion control systems in several industry applications. Generally, a high‐speed positioning servo system consists of robust control systems with integrator, such as PI controller. The industrial servo system always has the limitation for the capacity of the actuator and power amplifier. An ordinary industrial position servo system often has to deal with the saturation of motor current and motor speed. It is difficult for the high‐speed positioning servo system to keep the robust position control against the saturation of motor current and motor speed. This is the case because an ordinary position servo system has a complicated control structure with many control loops. Hence, it sometimes has a large overshoot and an oscillated response due to the limitation of motor current and motor speed. In order to overcome this problem, this paper proposes a new robust high‐speed positioning servo system considering the saturation of torque current and motor speed. The experimental results show that the proposed robust high‐speed positioning servo system has quick and stable position response for the saturation of motor current and motor speed. © 2009 Wiley Periodicals, Inc. Electr Eng Jpn, 170(3): 57–64, 2010; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/eej.20904