Vector control of permanent magnet synchronous motor based on dynamic matrix control

Aiming at the control problem of strongly nonlinear and coupled permanent magnet synchronous motor(PMSM)oil rig,this paper presents a predictive control method based on dynamic matrix model.In this method,the dynamic matrix algorithm using multistep prediction technique is applied to the speed loop control of the motor vector control.And its control effect is compared with the traditional proportional integral(PI)control of the motor.By comparing the initial dynamic response and the steady-state recovery under load interference of the two methods,it is shown that the dynamic response and the robustness of the motor controlled by the new method is better than that controlled by conventional PI method.And the feasibility of new control in the application of PMSM oil rig is verified.

Model predictive current control for PMSM driven by three-level inverter based on fractional sliding mode speed observer

Based on the fractional order theory and sliding mode control theory,a model prediction current control(MPCC)strategy based on fractional observer is proposed for the permanent magnet synchronous motor(PMSM)driven by three-level inverter.Compared with the traditional sliding mode speed observer,the observer is very simple and eases to implement.Moreover,the observer reduces the ripple of the motor speed in high frequency range in an efficient way.To reduce the stator current ripple and improve the control performance of the torque and speed,the MPCC strategy is put forward,which can make PMSM MPCC system have better control performance,stronger robustness and good dynamic performance.The simulation results validate the feasibility and effectiveness of the proposed scheme.

PMSM speed control using adaptive sliding mode control based on an extended state observer

In this study,a composite strategy based on sliding-mode control( SMC) is employed in a permanent-magnet synchronous motor vector control system to improve the system robustness performance against parameter variations and load disturbances. To handle the intrinsic chattering of SMC,an adaptive law and an extended state observer( ESO) are utilized in the speed SMC controller design. The adaptive law is used to estimate the internal parameter variations and compensate for the disturbances caused by model uncertainty. In addition,the ESO is introduced to estimate the load disturbance in real time. The estimated value is used as a feed-forward compensator for the speed adaptive sliding-mode controller to further increase the system's ability to resist disturbances. The proposed composite method,which combines adaptive SMC( ASMC) and ESO,is compared with PI control and ASMC. Both the simulation and experimental results demonstrate that the proposed method alleviates the chattering of SMC systems and improves the dynamic response and robustness of the speed control system against disturbances.

Backstepping Control of Speed Sensorless Permanent Magnet Synchronous Motor Based on Slide Model Observer

This paper presents a backstepping control method for speed sensorless permanent magnet synchronous motor based on slide model observer. First, a comprehensive dynamical model of the permanent magnet synchronous motor(PMSM) in d-q frame and its space-state equation are established. The slide model control method is used to estimate the electromotive force of PMSM under static frame, while the position of rotor and its actual speed are estimated by using phase loop lock(PLL) method. Next,using Lyapunov stability theorem, the asymptotical stability condition of the slide model observer is presented. Furthermore, based on the backstepping control theory, the PMSM rotor speed and current tracking backstepping controllers are designed, because such controllers display excellent speed tracking and anti-disturbance performance. Finally, Matlab simulation results show that the slide model observer can not only estimate the rotor position and speed of the PMSM accurately, but also ensure the asymptotical stability of the system and effective adjustment of rotor speed and current.

Predictive current control system of PMSM based on LADRC

For a permanent magnet synchronous motor(PMSM)model predictive current control(MPCC)system,when the speed loop adopts proportional-integral(PI)control,speed regulation is easily affected by motor parameters,resulting in the inability to balance the system robustness and dynamic performance.A PMSM optimal control strategy combining linear active disturbance rejection control(LADRC)and two-vector MPCC(TV-MPCC)is proposed.Firstly,a mathematical model of a PMSM is presented,and the PMSM TV-MPCC model is developed in the synchronous rotation coordinate system.Secondly,a first-order LADRC controller composed of a linear extended state observer and linear state error feedback is designed to reduce the complexity of parameter tuning while linearly simplifying the traditional active disturbance rejection control(ADRC)structure.Finally,the conventional PI speed regulator in the motor speed control system is replaced by the designed LADRC controller.The simulation results show that the speed control system using LADRC can effectively deal with the changes in motor parameters and has better robustness and dynamic performance than PI control and similar methods.The system has a fast motor speed response,small overshoot,strong anti-interference,and no steady-state error,and the total harmonic distortion is reduced.

基于谐振改进型单自由度自抗扰控制器的PMSM转速波动抑制策略

高性能系统期望电机输出平滑且稳定的转速。然而,永磁同步电机驱动系统的转速环遭受多源扰动影响,导致电机输出转速呈现非周期和周期波动。为了抑制转速环中多源扰动,该文提出一种谐振改进型单自由度自抗扰控制器(active disturbance rejection controller,ADRC)。单自由度ADRC保留了传统ADRC对非周期扰动的抑制能力。在此基础上,该文采用准谐振控制器拓展单自由度ADRC观测器在特定频率处的带宽,以进一步提高单自由度ADRC对周期扰动的抑制能力。因此,所提方法可以同时抑制转速的非周期和周期波动进而提高转速的控制性能。此外,该文利用Nyquist稳定判据分析所提方法的稳定性。最后,通过实验验证所提方法的有效性。

基于精确反馈线性化的PMSM自抗扰控制

为了提升永磁同步电机PMSM在负载变化和其他不确定干扰情况下的速度跟踪性能和抗干扰能力,提出了一种基于精确反馈线性化控制的自抗扰控制方法。首先,采用精确反馈线性化方法,通过坐标变化和状态反馈,将永磁同步电机模型解耦为独立的电流子系统和转速子系统,对转速子系统设计一种自抗扰控制器,对电机系统在运行中的不确定干扰进行实时估计并补偿,提升系统的速度跟踪性能和抗干扰能力。其次,针对自抗扰控制中非线性函数fal在拐点处不平滑的问题,对fal函数进行改进,减小了系统的高频抖振。最后,对基于精确反馈线性化、精确反馈线性化-自抗扰控制两种控制方法在MATLAB/Simulink仿真平台搭建相应的模型进行仿真结果对比,结果显示,精确反馈线性化-自抗扰控制速度跟踪调节时间缩短了58.33%,突加负载后恢复时间提升95.45%,表明该方法能够快速跟踪转速和负载转矩变化,具有良好的抗干扰能力,验证了所提方法的优越性。

积分型非奇异终端滑模PMSM无传感器控制系统

针对永磁同步电机中高速情况下传统的滑模观测器估算精度低且存在较强抖振的问题,提出一种基于改进型滑模观测器的PMSM矢量控制方法。基于非线性滑模面理论分析,构建一种积分型非奇异终端滑模面,有效降低了抖振现象,提高了系统的观测精确度;并设计了一种自适应反电动势滤波器,使反电动势能随观测器自适应调节,且谐波含量低,进一步提升动态精度;最后,利用正交锁相环原理调制出电机转子位置信息,将提出的新型控制方法应用到永磁同步电机调速系统,与传统滑模控制进行对比。仿真和实验表明,提出的基于新型滑模观测器的永磁同步电机控制系统跟踪精度高、鲁棒性强,动、静态响应好。

基于两级滤波的改进滑模观测器PMSM无速度传感器控制

针对永磁同步电动机(permanent magnet synchronous motor,PMSM)伺服系统中由滑模观测器引起的位置估算误差以及抖振问题,提出了一种改进的两级滤波滑模观测器。首先,根据PMSM的数学模型,设计了利用传统滑模观测器估计定子电流和反电动势的估计算法;其次,分析了传统滑模观测器在PMSM伺服系统应用中的不足;再次,提出了一种新的饱和函数以代替传统的符号函数,改进了滑模观测器的控制律;最后,通过变截止频率滤波器和卡尔曼滤波器组成的二级滤波器,得到PMSM转子更精确的位置估计信息。利用Matlab,对使用了传统观测器的系统和使用改进的观测器的系统分别进行了仿真,仿真结果表明:与使用了传统观测器的PMSM伺服系统相比,使用了改进观测器的PMSM伺服系统转速误差更小、估算结果更准确。

基于改进麻雀搜索算法分数阶PI的PMSM调速策略

永磁同步电机调速系统采用传统比例积分双闭环控制结构存在抗扰性能差与响应速度慢的问题。为此,文中在建立PMSM数学模型和分析传统PI参数设计方法的基础上,提出一种基于改进麻雀搜索算法分数阶比例积分的PMSM调速优化策略,通过在常规SSA中引入佳点集初始化策略和黄金正弦更新策略,解决了SSA易陷入局部最优的问题,提高了收敛速度和精度,以进一步改善PMSM调速系统的响应性能。最后通过MATLAB仿真对比结果可知,所述ISSA-FOPI调速改进策略在4种工况下具有最短的调节时间分别为1.2、0.9、9.9与12.1 ms,和最小的超调量分别为0.16%、0.16%、0.05%与0.6%,这充分体现了所述策略的有效性与优越性。

基于FCS-MPC的PMSM自抗扰弱磁控制系统设计与分析

永磁同步电机(Permanent Magnet Synchronous Motor,PMSM)弱磁控制系统常用于电动汽车领域。电动汽车运行于低速时,PMSM需要输出大转矩,以响应快速起步、加速及爬坡需求;电动汽车运行于高速,且超过额定速度时,PMSM处于弱磁状态,需具备一定的带载能力,以满足高速行驶和超车工况。针对PMSM弱磁控制中的转速突变,文章设计了自抗扰控制器(Active Disturbances Rejection Controller,ADRC)替代速度外环PI控制器,对扰动项快速观测和补偿,减小速度突变对系统造成干扰,实现转速精准跟踪。针对转矩项干扰,结合转矩和磁链输出值设计有限集模型预测控制(Finite Control Set Model Predictive Control,FCS-MPC)以替代传统直接转矩控制(Direct Torque Control,DTC),构建令转矩和磁链脉动最小的价值函数,再通过价值函数的计算寻优,选取出最优空间矢量控制信号输送给逆变器。基于ADRC和FCS-MPC的优化作用,弱磁控制系统的抗扰能力、电流和转矩输出精度增强,试验验证了所设计系统的可行性和性能优势。

基于级联式LESO的SPMSM无传感器控制研究

永磁同步电机无传感器控制逐渐取代传统有位置传感器的矢量控制方案,但在面对复杂工况时,无传感器控制方案在对抗各类扰动方面存在固有劣势,往往出现转速和位置估计精度下降的情况。该文在永磁同步电机双闭环矢量控制的基础上,基于级联式线性扩张状态观测器实现对转速和转子位置的快速跟踪,并基于带宽法进行参数整定。通过Simulink仿真,验证该方案在负载突变情况下的转速和位置跟踪性能,仿真结果表明,所提方案与传统方案相比可有效提高无传感观测器的抗扰性能。

基于新型趋近律的PMSM调速系统研究

针对负载扰动造成永磁同步电机(PMSM)调速控制系统性能下降的现象,提出了基于新型趋近律的无模型滑模控制算法。搭建PMSM转速环超局部模型,利用新型趋近律来提高系统趋近阶段的收敛速度,并设计了一个改进无模型滑模控制器增强抑制扰动。通过与传统的PI控制的实验结果进行对比,验证了所提方法动态响应强,具有强抗扰能力。

A sensorless efficiency test system for a high-speed permanent magnet synchronous motor

We present a sensorless efficiency test system with energy recovery for a high-speed permanent magnet synchronous motor(PMSM). In the system, two identical high-speed PMSMs are used as the motor under test(MUT)and the load machine(LM),respectively.A new sensorless vector control(VC) method based on a hypothetical reference frame is presented to control both the MUT and the LM.Also,a regenerating unit is used to implement energy circulation to save energy.Experiments were carried out on a prototype, with a digital controller based on the TMS320 F28335, to verify the adequacy of the sensorless VC method.As a result,the efficiency test system achieves the load test at the speed of 21000 r/min without any reduction equipment. During the test, the energy regenerated by the LM could be fed back to the MUT by the regenerating unit, and 81.31% electrical power was saved.In addition, with the proposed sensorless VC method,both the MUT and the LM can work at i_d = 0 without a position sensor.

永磁同步电动机转速自适应模糊Backstepping控制

针对永磁同步电动机(PMSM)参数摄动和负载干扰情况下的转速跟踪控制系统,采用自适应算法估计负载扰动、粘性摩擦系数和转动惯量,利用自适应模糊系统逼近定子电阻和电枢电感等参数摄动造成的总的不确定性,并设计一种基于Backstepping的自适应模糊控制器。通过Lya-punov稳定性理论验证所设计系统的稳定性。对PMSM转速控制系统进行仿真,结果表明,与常规PI控制相比,该控制方法能够在参数摄动和负载干扰下更好地跟踪转速给定值,系统具有良好的动静态性能和很强的鲁棒性。

永磁同步电机位置跟踪控制器及Backstepping方法建模

针对永磁同步电机(PMSM)绕组相电流和转速强耦合特性,基于backstepping方法设计了高性能的位置跟踪控制器,并建立了采用该控制器的PMSM伺服系统仿真模型。仿真结果表明,用backstepping方法设计的PMSM控制系统可以获得很好的跟踪效果,并且其滤波跟踪误差迅速以指数特性收敛到零,具有很好的位置伺服控制特性。

基于EKF PMSM定子磁链和转速观测直接转矩控制

针对传统直接转矩控制中存在电流、磁链和转矩脉动较大、及速度传感器的使用降低了系统可靠性、增加了系统成本等问题,提出基于扩展卡尔曼滤波器同时进行定子磁链和转速观测,实现了表面式永磁同步电动机无传感器直接转矩控制。该方法保持了直接转矩控制固有的转矩响应快和系统鲁棒性强的优点,降低了磁链和转矩脉动,并对电动机参数变化、负载扰动具有较强的鲁棒性,有效地改善了系统的动、静态运行性能,实验验证了该方法的可行性和有效性。

定子电流矢量定向下PMSM转矩脉动抑制方法

齿槽转矩和谐波转矩均会引起永磁同步电机输出转矩脉动,导致电流波形畸变。基于永磁同步电机电磁转矩的磁共能模型,提出一种基于定子电流矢量定向闭环I/f控制的永磁同步电机转矩脉动抑制方法。综合考虑气隙磁场畸变、齿槽转矩和电流畸变等多种因素,推导电机转矩脉动最小化条件下的最优定子谐波电流约束条件,利用反推控制原理构建了谐波抑制控制器。此外,还设计了一种带遗传因子最小二乘算法的永磁同步电机转速辨识方法。仿真和实验表明,设计的转速辨识算法能在较宽范围内实现电机速度辨识,所提控制方法提升了系统的控制精度,改善了电流波形,有效抑制了电机运行时的转矩脉动。

基于反步滑模变结构的PMSM速度控制

针对永磁同步电动机(Permanent Magnet Synchronous Motor,PMSM)矢量控制系统中速度控制精度受电机参数变化和负载波动影响问题,将研究基于反步滑模变结构PMSM速度控制器。结合反步控制能将复杂的非线性系统分解成不超过系统阶数子系统和滑模变结构控制不需要确定参数的优点,通过选择合适的控制律和滑模面设计了一种具有抗外部扰动控制性能的反步滑模变结构速度控制器。运用Lyapunov稳定性理论对所设计的速度控制系统进行了稳定性分析。仿真和实验结果表明所设计的速度控制器能有效降低电机参数变化和负载波动对速度控制精度的影响并具有良好的系统鲁棒性。

改进高频信号注入法的IPMSM转子位置检测研究

高频信号注入法是利用永磁同步电机的凸极效应,在静止坐标系上注入高频旋转电压,利用滤波器对高频响应电流进行信号处理,最终分析得到转子位置信息。常规滤波方式中使用的带通滤波器和带阻滤波器带来较大的相移和幅度衰减等问题,文章基于高通滤波器可以完全滤除直流量的特点,用同步轴系滤波环节代替带通滤波器和带阻滤波器。仿真研究表明,这种转子位置检测方法既能在低速时准确地观测出转子的空间位置,也能保证高速运行时较快的动态响应。