Design and Test of Motor Double Fed Speed Regulating System for Conveyer Belt

This paper introduces the design of doubly fed system for conveyor belt motor, the system adopts stator flux orientation vector control technology and AC-AC inverter motor speed and power factor control, and carried on the test in transmission field. This paper introduces in detail the structure and characteristic of DSP system, and gives a design scheme of Doubly Fed Speed Control System of motor based on this chip.

Speed Regulation Method Using Genetic Algorithm for Dual Three-phase Permanent Magnet Synchronous Motors

Dual three-phase Permanent Magnet Synchronous Motor(DTP-PMSM)is a nonlinear,strongly coupled,high-order multivariable system.In today’s application scenarios,it is difficult for traditional PI controllers to meet the requirements of fast response,high accuracy and good robustness.In order to improve the performance of DTP-PMSM speed regulation system,a control strategy of PI controller based on genetic algorithm is proposed.Firstly,the basic mathematical model of DTP-PMSM is established,and the PI parameters of DTP-PMSM speed regulation system are optimized by genetic algorithm,and the modeling and simulation experiments of DTP-PMSM control system are carried out by MATLAB/SIMULINK.The simulation results show that,compared with the traditional PI control,the proposed algorithm significantly improves the performance of the control system,and the speed output overshoot of the GA-PI speed control system is smaller.The anti-interference ability is stronger,and the torque and double three-phase current output fluctuations are smaller.

Using Artificial Neural Networks for Energy Regulation Based Variable-speed Electrohydraulic Drive

In the energy regulation based varibable-speed electrohydraulic drive system, the supply energy and the demanded energy, which will affect the control performance greatly, are crucial. However, they are hard to be obtained via conventional methods for some reasons. This paper tries to a new route： the definitive numerical values of the supply energy and the demanded energy are not required, except for their relationship which is called energy state. A three-layer back propagation（BP） neural network was built up to act as an energy analysis unit to deduce the energy state. The neural network has three inputs： the reference displacement, the actual displacement of cylinder rod and the system flowrate supply. The output of the neural network is energy state. A Chebyshev type II filter was designed to calculate the cylinder speed for the estimation of system flowrate supply. The training and testing samples of neural network were collected by the system accurate simulation model. After off-line training, the neural network was tested by the testing data. And the testing result demonstrates that the designed neural network was successful. Then, the neural network acts as the energy analysis unit in real-time experiments of cylinder position control, where it works efficiently under square-wave and sine-wave reference displacement. The experimental results validate its feasibility and adaptability. Only a position sensor and some pressure sensors, which are cheap and have quick dynamic response, are necessary for the system control. And the neural network plays the role of identifying the energy state.

DC Motor Speed Regulator via Active Damping Injection and Angular Acceleration Estimation Techniques

This paper suggests a novel model-based nonlinear DC motor speed regulator without the use of a current sensor.The current dynamics,machine parameters and mismatched load variations are considered.The proposed controller is designed to include an active damping term that regulates the motor speed in accordance with the first-order low-pass filter dynamics through the pole-zero cancellation.Meanwhile,the angular acceleration and its reference are obtained from simple first-order estimators using only the speed information.The effectiveness is experimentally verified using hardware comprising the QUBEServo2,myRIO-1900,and LabVIEW.

The research of power saving frequency conversion speed regulation experiment system

A power saving frequency difference controlling method was introduced by the double inverter and motor experiment system.The characters of the system under differ- ent loads were investigated.The theoretical analysis and experiment results show the frequency difference method is a ideal power saving speed regulation method for the dou- ble inverter and motor system.The experiment system is simply structured,convenient to operate and provides a new way of character testing for frequency conversion speed regulation.

A Model-Based Unmatched Disturbance Rejection Control Approach for Speed Regulation of a Converter-Driven DC Motor Using Output-Feedback

The speed regulation problem with only speed measurement is investigated in this paper for a permanent magnet direct current(DC)motor driven by a buck converter.By lumping all unknown matched/unmatched disturbances and uncertainties together,the traditional active disturbance rejection control(ADRC)approach provides an intuitive solution for the problem under consideration.However,for such a higher-order disturbed system,the increase of poles for the extended state observer(ESO)therein will lead to drastically growth of observer gains,which causes severe noise amplification.This paper aims to propose a new model-based disturbance rejection controller for the converter-driven DC motor system using output-feedback.Instead of estimating lumped disturbances directly,a new observer is constructed to estimate the desired steady state of control signal as well as errors between the real states and their desired steady-state responses.Thereafter,a controller with only speed measurement is proposed by utilizing the estimates.The performance of the proposed method is tested through experiments on dSPACE.It is further shown via numerical calculations and experimental results that the poles of the observer within the proposed control approach can be largely increased without significantly increasing magnitude of the observer gains.

The Applications of High-voltage variable frequency speed regulation System in Main Exhauster of Sintering

Main Exhauster is one of the main equipment of sintering production. It needs to consume a lot of electricity. Therefore, the system＇ s reconstruction for energy-saving will effectively reduce electricity for the production. The paper takes an iron and steel enterprise that had successfully transformed the synchronous motors of main exhauster of sintering as an example, which describes the application of high-voltage variable frequency speed regulation system in main exhauster of Sintering, so as to provide a reference for other iron and steel enterprises.

基于负载特性测试的矢量控制交流变频调速系统研究

针对堆垛机起升机构使用的三相异步电动机调速精度低、动态响应速度慢的问题,文中提出使用转子磁场定向矢量控制方法进行三相异步电动机调速。首先,根据交流变频调速系统的原理进行参数的等效坐标变换,将交流电动机的定子电流分解成转矩电流和励磁电流分量用于控制电动机的电磁转矩和励磁磁场,并结合三相异步电动机的特性曲线和变频器的工作原理在LabVIEW中建立数学模型;然后,利用Simulink平台对堆垛机起升机构的控制系统进行仿真。对比仿真与实测结果表明,转子磁场定向矢量控制的变频调速方法的使用提高了堆垛机起升机构在实际应用中的转矩和转速精度。

永磁同步电机自整定分数阶PID速度控制

为优化永磁同步电机(PMSM)控制效果,提高电机整体控制性能及鲁棒性,提出自整定分数阶PID控制策略,并应用于永磁同步电机速度环控制。该控制器较常规PID多了2个可调参数,能够更加灵活地控制受控对象。设计了前馈解耦的电流控制器、模糊分数阶PID控制器,利用模糊规则在线整定控制器参数;在Matlab中搭建永磁同步电机仿真模型,对比本文控制策略与常规PID控制、普通分数阶PID控制及滑模控制,分析不同速度下PMSM变负载系统转速仿真曲线。仿真结果表明,模糊分数阶PID控制器抗干扰性强、跟踪精度高、响应速度快,具有更好的控制效果。

基于STM32单片机的无刷直流电机自动化控制系统

针对无刷直流电机在负载突变工况中易出现电流异常、转速失调状态,电机不能自动化调节控制这一问题,设计了基于STM32单片机的无刷直流电机自动化控制系统。系统由三电阻电流采样电路采集电机运行电流信号,由单片机STM32进行对比分析,若该电流大于金属-氧化物半导体场效应晶体管的阈值,自动中断脉宽调制信号输出;使用霍尔转子位置检测电路采集电机转子位置数据,计算转子位置、转速数据,与期望转速比较后,若电机转速处于非理想状态,采用模糊自适应分数阶PID控制器自动调节无刷直流电机转速。实验验证,所设计系统在负载突变工况下表现出色,相电流保持正弦波状态,未出现突变问题;且可快速、自动调节电机转速,以达到期望转速,电机转矩波动也被控制在合理范围内。

交流调速系统模糊分数阶内模PID控制方法

针对高精度交流调速系统,将分数阶微积分理论、内模控制、模糊控制和比例积分微分(proportional integral differential,PID)控制相结合,提出了一种模糊分数阶内模PI-νDa+ν控制器。首先,考虑到分数阶微积分的优良特性,将其引入交流调速系统的内模PID控制器中,得到了一种分数阶内模PI-νDa+ν控制器,该控制器包含3个可调参数。然后,通过阶跃响应分析了控制器参数对系统性能的影响,并根据分析结果设计了模糊控制器,实现了控制器参数的智能整定,克服了分数阶控制器参数整定困难的不足。实验结果表明,模糊分数阶内模PI-νDa+ν控制器可以使系统具有良好的动态响应、扰动抑制特性和克服参数摄动的鲁棒性。

变速抽蓄机组有功分阶段多档位控制策略

变速抽蓄机组具有优越的快速有功支撑能力,是协助新能源消纳和保障新型电力系统安全稳定运行的重要手段,但其有功调节中存在功率响应差额问题以及励磁单元与调速器响应速度差异造成的功率失衡会导致转速反调波动,从而影响机组长期安全稳定运行,而目前协调有功和转速的控制策略无法充分发挥变速抽蓄机组有功快速响应能力。为此,设计了有功参考值整定单元,解决了有功调节的差额问题;提出了有功分阶段多档位控制策略,考虑转速安全范围对有功进行分阶段控制,充分协调转速反调和有功快速调节之间的矛盾;基于Simulink仿真平台,验证了所提出的策略能有效提高有功调节精度,且可在抑制转速反调的基础上有效提升功率调节性能,有利于充分发挥变速抽蓄机组调频优势,保障机组长期安全稳定运行。

计及转速及功率限制的双馈抽蓄自适应调频控制

双馈抽水蓄能机组可以通过变速运行灵活调节功率,在发电和抽水工况下均具备一定的调频潜能.为挖掘双馈抽水蓄能机组在不同工况下的调频能力,分别建立其适应不同工况运行特点的调频控制模块,提出计及转速及功率限制的自适应变参数调频策略.首先,在建立考虑可逆式水泵水轮机动态特性的机组模型基础上,构建发电工况下将频率偏差转换为附加功率指令、抽水工况下将频率偏差转换为附加转速指令的调频模块.其次,分析各调频参数对于频率动态响应的影响,并以系统频率偏差最小为目标,以机组的转速及功率限制为约束,提出基于改进粒子群算法的多工况最优调频参数确定方法,在此基础上形成随机组状态实时调整的自适应变参数调频策略.最后,以含双馈抽水蓄能机组的四机两区系统为例进行仿真分析,仿真结果表明:所提调频策略使机组在不同工况、不同运行状态下均具有良好的调频性能.

基于变频调速技术的矿山通风机优化控制研究

针对矿山通风机系统能耗高、控制精度差等问题,提出一种融合变频调速技术的优化控制方法。通过模块化设计控制系统,集成PID控制、模糊控制等算法,并在某煤矿主通风机上开展实验验证。结果表明,优化控制方案可使系统能耗降低21.8%,效率提高10.4个百分点,风量稳定性提升60.4%,响应速度加快66%。该研究为矿山通风机节能增效提供了新思路和技术支撑。

铣磨车高速走行手柄线性调速设计

钢轨铣磨车高速行车过程中,由于马达比例阀电流与速度呈非线性关系,通常存在走行手柄无法进行线性调速的问题。本文针对钢轨铣磨车手柄非线性调速的问题,通过对比例电磁阀的输入电流与走行速度关系的非线性曲线进行分段处理和理论误差计算,使得铣磨车高速走行速度与走行手柄间呈线性关系。仿真与实验结果表明,该手柄实际调速误差在1%以内,满足工程使用要求。

基于STM32F的智能风扇调速系统设计与研究

随着人们环保意识增强和社会对绿色生活的倡导,节能减排成为了家电产品设计的重要考虑因素。基于STM32F设计了智能风扇调速系统,通过精准调速控制和智能化管理,实现对风扇转速的智能、高效调控,可以有效降低能耗,为新一代的智能家居系统提供有益的技术支持和创新思路。

基于西门子S120超级压光机传动控制系统的改造

主要介绍造纸行业超级压光机传动系统升级改造的设计应用和系统的优化。

阀控式铅酸电池结构与包装精益设计

为了优化新能源动力阀控式铅酸蓄电池包装工艺,采用优化电池结构设计的方案,设计出嵌槽倒角式电池盖。将配套的提手绳由嵌槽嵌入圆孔,提高了安装速度。电池装箱后,将配套的提手管置于电池盖的顶面与正面倒角A处,将配套的螺栓置于电池盖的侧面与正面倒角B处,省去泡沫垫板。纸箱封合后外观平整。用嵌槽倒角式电池盖组装的阀控式铅酸蓄电池与传统的阀控式铅酸蓄电池相比,不仅提高提手绳安装速度约1倍,又将提手绳、泡沫垫板和纸箱三者的成本节约367.65~424.05万元/a。

带式输送机顺煤流启动速度的节能控制研究

为保证带式输送机的稳定运行,提出基于顺煤流启动的带式输送机变频调速节能控制优化方法。利用积分原理分析带式输送机皮带煤量检测装置结构,明确不同传感器的安装位置。使用超声波传感器、速度传感器分别采集带式输送机皮带煤流量、各点带速数据。结合目前煤流量、带速状态,设计基于模糊可编程逻辑控制器(PLC)的输送机变频调速节能优化方法。通过变频电动机调节带式输送机以自动化调节带速,完成带式输送机变频调速节能控制优化。试验结果表明:所提方法在执行带式输送机变频调速节能控制优化操作时,未出现电能浪费和皮带磨损问题。该方法可使带式输送机的启动带速、张力波动幅度明显变小,并使运行稳定性变高。该方法有效解决了电能浪费和皮带磨损等问题,保证了带式输送机顺煤流的稳定运行。

Study on Steering Control Strategy for High-Speed Tracked Vehicle with Hydrostatic Drive

Steering control strategy for high-speed tracked vehicle with hydrostatic drive is designed based on analyzing the fundamental steering theories of the hydrostatic drive tracked vehicle. The strategy is completed by the cooperation between integrated steering control unit and pump ＆ motor displacement controller. The steering simulation is conducted by using Simulink of Matlab. It is indicated that this steering control strategy can reduce the average vehicle speed automatically to achieve the driver＇s expected steering radius exactly in the case of en- suring not exceeding the system pressure threshold and no sideslip.