基于A-2-SMC开关磁阻电机直接转矩控制

文中针对开关磁阻电机转矩脉动大及其控制系统难以实现快速精确调速的缺点,提出了一种自适应二阶滑模控制与直接转矩控制相结合的复合控制方案,并对该方案中的自适应二阶滑模控制器进行设计。该控制器采用超螺旋算法,同时对其增益采用自适应调节,克服了传统二阶滑模控制器增益确定依赖于扰动导数界值的缺点。仿真结果表明,文中所采用的控制方案不仅能对电机转速实现快速精确控制,而且能对电机转矩脉动进行有效抑制。     

汽车仪表步进电机控制算法的仿真

本文设计一种针对汽车仪表板的步进电机控制方案,阐述了步进电机的控制算法,用LabVIEW进行了仿真分析和验证.实验证明,无需步进电机控制芯片,利用软件能够实现步进电机的准确控制.     

基于TL494的涡轮扭矩电机的PWM控制设计

针对导向钻井系统中对电机控制的具体要求,分析了旋转导向钻井系统的电机转矩控制问题,给出了电机转矩的PWM控制设计方案。该方案在电机扭矩的控制部分采用功能强大的脉宽调制控制器TL494,并通过外扩简单的硬件电路自动调节脉冲输出,从而实现了下电机转矩的控制,达到了上下电机转矩平衡的目的。     

氢能发电机空气供给系统变频控制技术初探

为了使空气供给系统供气量满足发电系统发电量随负荷变化的要求,在分析感应电机变频调速控制原理的基础上,提出了基于PEMFC氢能发电装置空气供给驱动系统采用交流感应电机和矢量控制变频调速技术．通过比较矢量控制的几种方案,提出采用问接转子磁场定向电流注入型感应电机矢量控制方案,并对其进行了仿真研究。     

异步电机直接转矩控制系统的仿真研究

直接转矩控制技术（DTC）是一种由矢量变换控制技术发展起来的性能优良的新型交流调速控制技术。作为20世纪80年代中后期提出的异步电动机交流变频调速新思想,直接转矩控制技术拥有独特的控制思想,优良的静、动态性能及良好的鲁棒性,且容易进行数字化控制等特点,在交流调速领域受到普遍欢迎。许多学者已经对直接转矩控制系统的各种不同实现方案进行了比较深入细致的研究,这里仅对不同的研究方案作分析和比较,同时对其进行仿真说明。通过对转矩调节和磁链调节的比较,分析了传统的直接转矩控制中存在的不足;通过对相关问题成因的分析,提出了相对应的使电机产生更优控制电压波形的方法,最后通过MATLAB仿真验证试验结果。     

基于Multisim12的电机驱动模块设计与仿真

随着汽车工业的迅速发展,汽车智能化成为大势所趋.电机驱动模块是智能车的重要组成部分.基于探索不同频率PWM控制电机输出的目的,采用Multisim12仿真软件以B车模为研究对象,对电路的工作波形进行了仿真实验测试,给出了仿真实验方案,分析了PWM选取不同频率时电路工作波形.通过实际测试,该电机驱动模块能很好完成智能车电机驱动.     

基于自适应模糊神经网络的感应电机矢量控制

感应电机在传统PI控制中,参数固定且容易超调。针对该问题,文中研究了一种基于自适应模糊神经网络PI控制与全阶自适应观测器的感应电机矢量控制方案。根据感应电机数学模型建立了全阶自适应观测器的模型,采用Lyapunov稳定性理论对其进行了稳定性分析设计,并推导了转速自适应律。电机速度外环PI由自适应模糊神经网络推理系统在线整定优化,与传统控制方案相比,该方法易于实现,能够有效提高控制精准性,抑制外部扰动,节省了传感器成本。MATLAB/Simulink仿真实验表明,所提方案不仅改善了无速度传感器感应电机矢量控制系统的动态性能,还减小了外部负载扰动等情况的影响,提高了系统的自适应性和鲁棒性。     

基于DSP的电动助力转向系统的设计

电动助力转向（EPS）是一种新型的汽车动力转向技术。设计了一种基于TMS320LF2407A DSP控制的汽车电动助力转向系统,介绍了其硬件组成及软件结构,采用PID控制策略对电机电流进行闭环控制,利用PWM技术控制电机的电压,以调节助力电流达到助力转向的目的。并做了Matlab仿真实验,仿真结果表明,该系统具有良好的助力特性。     

一种改进的永磁直线电机伺服系统的研究

针对在永磁同步直线电机伺服系统中传统的PI速度环控制器动态响应和输出超调量不理想的问题,提出了基于模糊控制PI切换的速度控制器,并在Matlab/Simulink仿真环境下,建立了基于PI速度控制器和基于fuzzy-PI切换的永磁同步直线电机仿真模型,仿真结果表明:模糊控制PI切换的速度控制器可以明显地降低系统的调节时间和超调量,改善永磁同步直线电机伺服控制系统的动态性能。     

基于LabVIEW的步进电机控制

为了实现PC机对步进电机的自动调节,设计了基于虚拟仪器技术的步进电机控制方案。系统采用L298N芯片进行驱动,以LabVIEW作为开发平台,并通过串口实现数据通信。结果显示,该系统能够很方便地实现步进电机的转速转向控制,而且利用虚拟仪器开发平台LabVIEW编写上位机程序,具有编程简单,控制界面友好,程序可移植性强的特点。     

A new scheme for speed-sensorless control of induction motor

Various control algorithms have been proposed for the speed-sensorless control of an induction motor. These sensorless algorithms are mainly based on the speed feedback with the flux and speed estimations. This paper proposes a new scheme for the speed-sensorless control of an induction motor. The proposed scheme is based on the current estimation without the flux and speed estimations, in which the controlled stator voltage is applied to the induction motor so that the difference between stator currents of the mathematical model and motor may be forced to decay to zero. The performance of the proposed scheme is verified through simulation and experiment.     

Variable structure control of an SRM drive

The applications of a variable-structure system (VSS) to the control of a switched reluctance motor (SRM) drive is presented. After reviewing the operation of an SRM drive, a VSS-based scheme is formulated to control the drive speed. The scheme is then designed and tested by simulation. The results show that the VSS control is effective in reducing the torque ripple of the motor, compensating for the nonlinear torque characteristics, and making the drive insensitive to parameter variations and disturbances     

Analysis and implementation of a real-time predictive currentcontroller for permanent-magnet synchronous servo drives

A real-time current controller for PWM inverter-fed permanent-magnet synchronous motor drives is presented and analyzed. The proposed current control scheme is based on predictive control with a parallel integral loop added to compensate for the inaccuracy of the motor model and for the variations of motor parameters and DC voltage source. The proposed current control scheme is analyzed and its performance is evaluated by computer simulation. An EPROM-based implementation is presented in which calculations and pulsewidth modulation are executed by lookup tables resulting in high-speed operation. The controller performance is evaluated using a prototype l kW PM synchronous servo drive. Experimental results are given and discussed     

Damping a hybrid stepping motor with estimated position and velocity

It is well known that microstepping reduces the resonance behavior of stepping motors since the rotor moves in a sequence of very small steps. However, the under-damped nature of the motor does not change. In this paper, a scheme that uses microstepping and closed loop position control to stabilize and reduce resonance damping of the motor is proposed. The motor currents are controlled in a frame rotating synchronously with the excitation frequency. The d-axis current provides the torque to oppose the external load, and the q-axis current provides the transient torque to damp the motor. The motor velocity and position are estimated via an observer that tracks the angle of the motor back EMF voltage. The response of the closed loop system is independent of the external load level. Both simulation and experimental results have shown that the proposed control scheme is very effective in damping out the resonance of microstepping-controlled motors.     

基于重复滑膜控制的PMSM的矢量控制系统

针对永磁同步电机(PMSM)在负载突变时产生的抖振现象,文中提出了一种重复滑模控制方法。首先,详细介绍了永磁同步电机的数学模型和滑膜变结构的基本原理,并在PMSM速度环上采用滑膜控制方法代替传统的PI控制。其次,具体分析了重复控制的基本原理,在滑膜控制的基础上加入重复控制,提出了一种新型的重复滑膜控制策略,建立了基于MATLAB/Simulink的电机仿真模型。仿真结果表明,此控制方法在电机转速上升阶段具有较好的系统响应性;在电机突加负载时,电机转速最大突变值比使用滑膜控制时减少了74.55%,且电机恢复到稳定状态用时为使用滑膜控制时的37.5%;验证了所提出的重复滑膜控制方法具有较强的抗负载性和系统稳定性。     

基于模型预测控制的电动汽车轮毂电机转矩控制研究

分布式驱动电动汽车（Distributed Drive Electric Vehicles,DDEV）采用内嵌式轮毂电机,使各车轮独立可控,具有调节形式多样化等突出优点.合理的轮毂电机转矩分配是保证DDEV稳定性的关键.本文为提高DDEV稳定性,分析了轮毂电机转矩分配与稳定性的关系,提出一种基于模型预测控制器的DDEV轮毂电机转矩分配控制系统.所提出的控制系统由上层控制器和下层控制器两个主要部分组成.上层控制器设计了基于拉盖尔函数的模型预测控制器,综合分析保证DDEV稳定性所需的轮毂电机转矩约束条件,实现轮毂电机最优转矩分配,提高DDEV稳定性.下层控制器对四个轮毂电机进行实时控制,执行上层控制器设计的最优转矩分配方案.最后在搭建的Matlab/Simulink环境下进行仿真验证.     

Robust Control of PM Spherical Stepper Motor Based on Neural Networks

There are many uncertainties and disturbances in the real dynamic system of a spherical stepper motor that make traditional control methods with lower precision, such as uncertain changes of magnetic field, load, and friction that generate speed ripple and deteriorate the 3-D tracking performance of the spherical motor system. In this paper, an available method is proposed to solve them by using neural networks (NNs) and a robust control scheme for improving the performance. First, a simplified torque calculation model based on finite-element method results can guarantee quick prediction of electromagnetic torque with lower error. Thus, the system model considering the friction, load, and disturbances is developed. Second, a robust NN (RNN) control scheme is presented to eliminate uncertainties to improve the tracking robust stability and overcome the undesired influence of uncertainties based on the nonlinear system dynamic model under continuous-trajectory tracking mode. Finally, as an example, the step-response and continuous-tracking processes of the motor using an RNN controller are simulated, and experiments, including the tracking using RNN proportional–differential control, are carried out to confirm the usefulness of the proposed control scheme. The simulation and experimental results of the proposed control scheme on the spherical stepper motor system demonstrate the effectiveness on satisfactory tracking performance.      

永磁同步电机矢量控制策略分析

本文通过矢量控制策略采用id=0控制方案快速准确地控制转矩,实现调速系统具有较高的动态性能。并利用了Matlab工具对永磁同步电机矢量控制系统在空载起动、转速突变、负载突变进行了仿真研究。     

基于FOC的PMSM速度控制系统的研究

根据磁场定向控制理论以及永磁同步电动机调速控制系统的控制方案建立仿真模型,并对永磁同步电动机的调速过程进行仿真.仿真结果较好地反映了永磁同步电动机的调速运行过程,对进一步开发永磁同步电动机速度控制系统具有重要意义.     

An adaptive current control scheme for PWM synchronous motordrives: analysis and simulation

Two schemes for controlling the motor currents in PWM (pulse-width-modulated) inverters in synchronous motor drives are considered: hysteresis control and predictive control. It is pointed out that the system static and dynamic performance can be improved by selecting the control mode in an adaptive manner according to the operating conditions. In steady state, the predictive mode is selected to reduce current ripple and to obtain stable switching frequency. During large transients, such as during starting or load variations, the hysteresis mode is selected to provide fast response. The performance of the proposed controls scheme has been studied by simulation, and the results agree well with the prediction. This adaptive control scheme can be implemented using a high-performance 16-bit microcontroller supported by a mathematical coprocessor