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。     

高压断路器三相永磁无刷直流电机机构控制算法研究

针对高压断路器三相永磁无刷直流电机机构,研究了不同控制策略下电机操动机构的运动特性.考虑高压断路器的分、合闸操作过程,建立了永磁无刷直流电机操动机构运动控制系统的仿真模型,采用数字式双闲环控制,内环为电流环,采用PI控制,外环为速度环,基于传统PID控制器、单神经元PID控制两种不同控制策略控制.通过对伺服控制系统的仿真分析得到了电机操动机构速度跟踪控制特性.结果表明,单神经元PID控制器能够较好的实现触头速度的跟踪控制,使其按理想运动特性曲线运动,是一种较理想、有效的控制方法.     

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     

永磁同步电机的双闭环调速系统设计

永磁同步电机因其优越的性能近年来得到了广泛应用。针对双闭环控制器参数整定困难所导致的控制效果不佳的问题,文中提出了基于极点配置和Ramp函数的改进型双闭环PI控制器。从永磁同步电机矢量控制算法的角度出发,建立了速度、电流双闭环解耦控制的系统模型,并在此模型下论述了速度环、电流环控制器的设计方法,给出改进后双闭环控制器参数的计算结果。对所研究方法分别进行了计算机仿真和实际试验,结果表明优化后的系统减小了系统过冲,缩短了稳定时间,提高了系统动态响应,具有良好的工程意义。     

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。     

基于滑模控制的永磁同步电机直接转矩控制研究

针对永磁同步电机直接转矩控制(DTC)存在较大的电磁转矩脉动、磁链脉动、低速性能不理想等问题,文中引入滑模控制策略对永磁同步电机进行直接转矩控制。通过建立PMSM的矢量数学模型,设计基于滑模控制的直接转矩控制器,利用MATLAB/Simulink进行建模仿真分析。结果表明,与传统DTC相比,基于滑模控制策略的永磁同步电机直接转矩控制系统中电磁转矩脉动幅值更低,且具有更好的动态性能和抗扰动能力,可以更加有效地改善系统特性,满足实际电机控制的需要。     

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SIMULINK的永磁同步电机矢量控制系统仿真

根据永磁同步电机在A-B-C三相坐标系和d-q两相旋转坐标系下的数学模型,介绍了矢量控制的基本原理,然后在MATL AB中利用SIMULINK仿真平台搭建永磁同步电机矢量控制系统进行仿真,并对该系统进行实验验证。仿真实验验证的结果表明:该系统的正确性和良好的控制性能,为永磁同步电机矢量控制系统的设计提供了良好的理论基础...     

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     

Nonlinear control of a series DC motor: theory and experiment

The control problem for a series DC motor is considered. Based on a nonlinear mathematical model of a series-connected DC motor, it is shown that the combination of a nonlinear transformation and state feedback (feedback linearization) reduces the nonlinear control design to a linear control design. To demonstrate its effectiveness, an experimental study of this controller is presented. These experimental results are also compared with a simulation of the closed-loop system. Finally, it is shown that a nonlinear observer (with linear error dynamics) for speed and load torque can be constructed based only on measurements of the motor current. Experimental results of this speed and load-torque estimator are also presented     

基于模糊-PI双模控制的永磁同步电机控制系统

结合PMSM的数学模型和控制理论新发展,引进先进的"复合型控制策略"用以改进控制器性能,把模糊控制和传统PI控制相结合,提出了模糊-PI双模控制策略。其根据事先给定的偏差范围,实现模糊控制和PI控制的自动切换,并基于此设计了模糊-PI控制的永磁同步电机控制系统模型。在Matlab/Simulink平台上,对系统进行建模和仿真,结果表明,该控制器动态响应迅速,基本消除了稳态误差,具有很好鲁棒性、动态特性和稳定性。     

A novel bearingless interior permanent magnet slice motor driven blood pump

A 2-pole bearingless interior permanent magnet (IPM) motor with slice rotor configuration is presented in this paper. A novel IPM rotor is designed considering direct and indirect operational specifications such as force constant, torque constant, axial/radial stiffness and cogging torque. Cogging torque and its resulting vibrations affect motor and levitation operation significantly. Hence, various rotor configurations are simulated using the finite element method to develop a topology that minimizes these phenomena. The final topology is tested for closed-loop levitation and speed control. The motor is also tested for its intended application as a blood pump. A mock circulatory loop is developed to measure the performance of the pump. The simulation results, experimental control system performance and pump performance results are shown and explained in the paper.     

基于预测函数控制的无刷直流电机控制研究

由于无刷直流电机调速系统具有非线性、多变量、不确定时变系统等特点,在高控制精度和快响应速度的条件下,传统的PID控制方法已经不能满足无刷直流电机调速系统的要求,如果其中的参数变化超过一定范围,整个控制系统会出现不稳定。在分析无刷直流电机（BLDCM）的数学模型并将其简化的基础上,提出了一种无刷直流电机的预测函数控制（PFC）策略,并进行了Matlab仿真试验。该BLDCM系统采用双闭环调速,速度环中采用PFC控制,计算得到参考电流值作为电流环的输入,电流环采用离散PI控制,由滞环电流跟踪型PWM逆变器的原理实现电流控制。仿真试验结果显示,这种无刷直流电机调速系统可以取得良好的控制效果。     

Application of the Networked Predictive Control in Servo Systems

The paper uses predictive control theory combined with a Kalman Filter to stabilize the Networked Control System. A networked servo motor system is set up and its mathematical model is identified for further simulation. The novel aspects of this paper are the system model, which is built with an Embedded MATLAB Function, and simulation and experiment are also based on the model. From the results of simulation and experiment, the networked predictive controller shows a good performance.     

A DSP-based adaptive controller for a smooth positioning system

The implementation of a self-tuning regulator for the positioning of a direct-drive servomotor is described. The servo motor is a permanent magnet DC motor in which no speed reducer is used. The auto-tuning regulator consists of two major loops. The inner loop contains a feedback (PD or PID) regulator with additional feedforward terms. The parameters of the feedforward compensation are adjusted by the outer loop, which contains an online parameter estimator. The estimator is based on a recursive least-squares equation, and the estimated parameters are the load inertia and viscous friction. This self-tuning regulator has been simulated with PC.MATLAB, and the results demonstrate the high performance of the scheme. Experimental results obtained with a small DC motor (Electrocraft E-576) are presented, and these results show good agreement with the digital simulation results. There are two innovative aspects to this work. First, parameter estimation is used to adapt the feedforward compensation terms instead of the gains of the feedback controller, as usually is the case in conventional indirect self-tuning regulators. Secondly, the complete adaptive controller has been implemented using a single-chip digital signal processor (DSP), which results in the reduction of system hardware and cost     

电动汽车用永磁同步电机模糊控制仿真

研究了电动汽车用的正弦波永磁同步电机模糊控制的仿真分析。分析了永磁同步电机用于矢量控制的数学模型，并建立了基于其数学模型的电机控制仿真软件包。通过对模糊PI控制方法的仿真实验，去验证所开发的电动汽车用的永磁同步电动机驱动系统具有良好的性能，能够很好地满足电动汽车性能要求。     

Fuzzy adaptive speed control of a permanent magnet synchronous motor

A fuzzy adaptive speed controller is proposed for a permanent magnet synchronous motor (PMSM). The proposed fuzzy adaptive speed regulator is insensitive to model parameter and load torque variations because it does not need any accurate knowledge about the motor parameter and load torque values. The stability of the proposed control system is also proven. The proposed adaptive speed regulator system is implemented by using a TMS320F28335 floating point DSP. Simulation and experimental results are presented to verify the effectiveness of the proposed fuzzy adaptive speed controller under uncertainties such as motor parameter and load torque variations using a prototype PMSM drive system.     

直流电机PID控制系统仿真研究

直流电机是将直流电能转换成机械能或将机械能转换成直流电能的旋转电机。PID（比例-积分-微分）控制器,由比例单元P、积分单元I和微分单元D组成,通过Kp,Ki和Kd 3个参数的设定,主要适用于基本线性和动态特性不随时间变化的系统。PID控制器作为最早实用化的控制器已有70多年的历史,产品已在工程实际中得到了广泛的应用。PID控制器由于简单易懂,在使用中不需精确的系统模型等先决条件,因而成为应用最为广泛的控制器。文章针对常规直流电动机PID控制系统的参数整定存在一定复杂性的问题,分析了PID控制系统的结构和原理,根据参数的选择,建立了数学模型。对直流电动机模型进行仿真分析,并对PID控制的仿真结果进行对比分析,通过仿真结果发现PID控制系统具有良好的静、动态性能和鲁棒性。     

Variable flux control of permanent magnet synchronous motor drivesfor constant torque operation

In this paper, a small signal model of permanent magnet synchronous machines is developed which includes both components of torque, i.e., magnet torque and reluctance torque. The effects of flux variations on the torque are analyzed by the use of the developed model. The off-line torque compensation method proposed for induction machines is then adapted to permanent magnet motor drives to achieve a constant torque, variable flux operation of the drives. A sensitivity analysis is performed to show that the off-line method is influenced considerably by machine parameter variations. Therefore the concept of forced compensation is introduced and an on-line torque compensation controller is proposed. Simulation results are presented to show the effectiveness of the proposed controller. An experimental vector controlled permanent magnet motor drive including the on-line torque compensation controller is implemented based on a TMS320C31 DSP to evaluate the method. The experimental results also confirm a desirable variable flux control of the motor drive under constant torque operation     

基于遗传算法的红外成像导引头伺服控制系统设计与仿真

对某红外成像导引头的伺服控制系统进行了设计与仿真。根据某红外成像导引头伺服控制系统实现的两个功能,设计了系统控制的位置回路和稳定回路。在获得被控对象稳像平台的数学模型后,利用遗传算法优化设计了PID控制器的三个参数,并通过MATLAB/SIMULINK工具对控制回路作了相应的控制性能仿真及分析,以验证系统的理论正确性和可行性。