Determination of converter control algorithms for brushlessdoubly-fed induction motor drives using Floquet and Lyapunov techniques

This paper presents a method of analyzing the stability of brushless doubly-fed machines (BDFM) in the synchronous mode of operation. Unlike the stability analysis of conventional induction and synchronous machines for which the linearized state equations are time-invariant, the linearized state equations of the BDFM are time-varying and, consequently, their eigenvalue analysis cannot be performed directly. However, since the system matrix of the linearized equations is a periodic function of time, the generalized theory of Floquet can be applied to transform the time-varying system of equations into an equivalent set of equations with a constant system matrix. Eigenvalue analysis can then be employed to analyze the stability characteristics of given equilibrium points. Investigation into the stability of a proof-of-concept BDFM in the synchronous mode of operation using the transformed linearized model shows good correlation between theoretical and experimental results. In addition, the possibility of designing a BDFM drive with inherent open-loop stability over the entire speed range is demonstrated. Finally, under stable steady state synchronous operation, power converter control methods are discussed and it is shown that scalar control methodologies similar to those for induction motor drives can be applied to the BDFM     

无刷双馈电机控制与应用前景

无刷双馈电机(BDFM)是一种新型交流电机,它兼有异步电机和同步电机的共同优点,去掉了转子侧电刷,提高了机械稳定性,降低了维修成本。本文详细综述了无刷双馈电机的发展历史、运行原理、数学模型、控制策略,简单介绍了无刷双馈电机的应用,并对其发展前景作了展望。     

无刷双馈电机控制算法综述

在分析无刷双馈电机的工作原理的基础上,详细比较分析了无刷双馈电机的基本控制算法、自适应控制算法及智能控制算法的发展现状,以及不同控制算法的优缺点和适用场合。最后展望了控制算法的发展趋势。     

永磁同步电动机自控式变频调速系统研究

针对永磁同步电动机他控式变频调速系统需要借助外部装置测得电机转速信息,因此增加了设计难度,文中研究了一种永磁同步电动机自控式变频调速系统,该系统能在负载发生变化时,通过位置传感器及时反馈转速信息,从而改变供电电路的频率,调节转速而使系统达到稳定。文中阐述了永磁同步电动机自控式变频调速系统在Matlab/Simulink中的建模与仿真过程,并对仿真结果进行了分析。仿真结果表明,该波永磁同步电动机的自控式变频调速系统具有优异动态和静态性能,是一种较为理想的调速方式。     

直驱永磁同步风力发电系统MPPT跟踪控制

根据永磁同步风力发电机的运行特性,构建以输出功率为反馈量、转速为控制对象的最大风能捕获控制模型,并在永磁同步发电机d,q轴数学模型和矢量控制理论基础上,通过转子磁场定向控制策略,实现有功、无功功率解耦控制,减小了损耗,并且较好地控制了转速。利用Matlab/Simulink进行仿真,对风速阶跃变化时机组运行情况进行了仿真,并给出了仿真结果。实验结果验证了该控制系统的正确性与可行性。     

泵用永磁同步电动机变频调速控制系统设计

为了提高泵用永磁同步电机的工作效率,研制了一种永磁同步电机变频调速控制系统.该系统以80C196MC单片机为控制核心,采用简单的V/F变频控制方法达到较好的控制效果.针对该控制系统的硬件和软件实现进行了论述,并通过实验证明了该控制系统的可行性.     

三辊轧管机同步控制的研究

采用PID控制方法,以实现三辊轧管机转速同步为目标,设计了基于西门子S7-300PLC直流电机调速系统,经过在轧管系统中的试运行表明,该方案响应迅速,动态同步误差小,能较好地满足被控对象对高精度同步控制的要求,并在实验平台上获得了较好的控制效果。     

基于龙贝格观测器的PMSM无位置传感器控制系统设计

针对基于低分辨率霍尔位置传感器的永磁同步电机系统在中高速时出现的估算精度低与响应速度慢等问题,在建立永磁同步电机数学模型的基础上,将龙贝格观测器与锁相环结构相结合,提出一种永磁同步电机无位置传感器控制算法。利用MATLAB/Simulink工具搭建控制系统仿真模型验证该控制系统的可行性,并通过搭建基于PAC5232的实物平台对比验证龙贝格观测器相对于霍尔位置传感器的优越性。实验结果表明,该无位置传感器控制系统有效地提高了系统的响应速度和估算精度,使其能够更好地跟踪转子速度以及转子位置信息。     

基于Super-twisting滑模控制的PMSM直接转矩控制中速度控制器研究

本文设计了基于Super-twisting滑模速度控制器的永磁同步电机直接转矩控制系统,仿真分析了参数变化对系统输出特性的影响,分析结果表明,采用Super-twisting滑模速度控制器的永磁同步电机直接转矩控制系统比采用PI速度控制器的永磁同步电机直接转矩控制系统的鲁棒性强。     

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.     

Microprocessor-based controller design and simulation for apermanent magnet synchronous motor drive

The speed control of a permanent magnet (PM) synchronous motor drive that is fed by a current hysteresis-controlled voltage-source inverter is investigated. The objective is to study the feasibility of implementing a microprocessor-based controller that may achieve complete software control of motor speed. A mathematical model and a digital control principle for controlling the PM synchronous motor are described. The sampling period and the controller parameters are determined analytically according to a linearized model. A systematic simulation procedure is proposed for verifying the feasibility of theoretical modeling and controller design. An experimental prototype system is constructed for correlating with the theoretical results. The experimental results closely follow theoretical predictions, thus validating the proposed control method     

内置式永磁同步电机弱磁控制技术的研究

针对电动汽车所使用的内置式永磁同步电机在不同工况下的转速与转矩需求,基于内置式永磁同步电机标幺化数学模型,文中设计了在线计算法最大转矩电流比控制与电压反馈法弱磁控制相结合的控制策略,以便对电机进行弱磁控制。以一台2.8 kW永磁同步电机作为研究对象,使用MATLAB/Simulink对所设计控制策略进行了仿真研究,并搭建弱磁控制系统实验平台并进行验证。仿真及实验结果表明,该控制策略具有较好的鲁棒性与较快的转矩响应速度,可以满足电机不同工况下的转速转矩需求。     

An MRAC-based nonlinear speed control of an interior PM synchronous motor with improved maximum torque operation

A model reference adaptive control (MRAC)-based nonlinear speed control strategy of an interior permanent magnet (IPM) synchronous motor with an improved maximum torque operation is presented. In most servo systems, the controller is designed under the assumption that the electrical dynamics are neglected by the field-oriented control. This requires a high-performance inner-loop current control strategy. However, the separate designs for a high-performance current regulator and a robust speed controller need considerable effort. To overcome this limitation, an MRAC-based nonlinear speed control strategy for the IPM synchronous motor is presented, considering the whole nonlinear dynamics. Nonlinear speed control is achieved by an input–output linearization scheme. This scheme, however, gives an unsatisfactory performance under the mismatch of the system parameters and load conditions. For the robust output response, the controller parameters are estimated by an MRAC technique in which the disturbance torque and flux linkage are estimated. The adaptation laws are derived from Lyapunov stability theory. In view of the drive efficiency, the motor has to provide the maximum torque for a given input. To drive the IPM synchronous motor under improved maximum torque operation, the estimated flux linkage is employed for the generation of the d-axis current command. The robustness and output performance of the proposed control scheme are verified through simulation results.     

基于多率采样的永磁同步电机控制方法设计

在工业自动化领域,永磁同步电动机在中小功率控制系统中发挥着重要作用。本项目采用多采样率方法构建永磁同步电机控制系统,其主要解决的问题包含多采样率下的速度及参数辨识、永磁同步电机多采样率滑模变结构控制系统设计。     

基于IRMCK201和ZigBee的圆网印花同步控制系统

针对圆网印花系统中导带驱动辊与圆网驱动对速度同步的要求,提出了基于IRMCK201和ZigBee技术的圆网印花同步控制系统,给出了同步控制系统结构。选用IRMCK201专用电机伺服控制芯片作为各驱动电机的伺服控制器,选用基于ZigBee技术的无线芯片CC2430作为系统主控制器和数据通信网络。设计了伺服控制电路、主控制器和无线通信节点电路以及相应的程序流程,实现了圆网印花系统各单元的速度同步控制。运行结果表明,该系统稳定可靠、抗干扰、能耗低、体积小、成本低,为纺织生产中圆网印花各驱动单元的同步控制提供了一种新技术。     

基于模糊理论的永磁同步电机直接转矩弱磁控制

针对现有永磁同步电机的直接转矩弱磁控制,难以做到实时监测负载条件和参数变化,只能在空载时实现全速运行问题,文中给出一种基于模糊控制理论的弱磁控制算法。该算法基于实时转速和转矩的变化,根据模糊理论智能地调节直接转矩控制中的磁链给定值,从而实现弱磁控制。通过Matlab/Simulink仿真验证了算法的正确性。     

基于神经网络的多电机同步控制

文章通过对多电机同步控制的原理及其特点分析,将神经网络与PID控制相结合,设计一种神经网络PID控制器并用于多电机同步控制中,有效的缓解负载带来的同步误差,实验结果表明,在相同扰动情况下,该方法能更好的使多电机以一定速度同步运行。     

关于济源钢铁同步电机高压变频器的系统设计

随着现代电力电子技术及计算机控制技术的迅速发展,高压变频调速被国内外公认为最有发展前途的调速方式。对同步电机高压变频器设计,需要考虑各种综合因素,不仅仅是高压变频器的单独设计,还包括同步机的励磁系统,同步投切设计以及各相互之间的联锁关系的设计,是一个系统工程的整体解决方案设计。     

基于TMS320F2812的永磁同步电机双闭环矢量调速系统

根据永磁同步电机的数学模型和坐标变换的原理,介绍了矢量调速系统,利用数学方程推导了电流环和速度环PI控制器的传递函数和参数解析计算式。基于TMS320F2812平台,结合实际系统,考虑误差和参数补偿,完成双闭环调速系统的设计。实验结果表明,该永磁同步电机双闭环矢量调速系统能够稳定运行,并有良好的控制性能,快速、准确完成闭环调速功能。     

Development and testing of the torque control for the permanent-magnet synchronous motor

Hybrid electrical vehicles and electrical vehicles are being actively developed. A hybrid electric vehicle motor design requires high efficiency, high power/weight ratio, and reliability from low rotor speed to high rotor speed. The permanent-magnet synchronous motor is used in order to fulfill these requirements. The purpose of this paper is to develop a permanent-magnet synchronous motor control method for all rotor speeds. This method increases the torque and the efficiency at high speed when compared to the ordinary current error feedback method. A method composed of two compensators is proposed to achieve this objective. One of the compensators controls the torque using the voltage phases. The other one is the ordinary current error feedback. Several correcting methods for the voltage phase compensator have been proposed for the compensator for many control demands. The validity of the proposed method was confirmed using simulation and experimental evaluations.