MULTIPARAMETER MONITORING OF THE SPEED ADJUSTMENT SYSTEM OF A 390 MW FRANCIS TURBINE

2019 ◽  
Author(s):  
ANGELO MADUREIRA ◽  
Edileno Miranda Cordovil
Keyword(s):  
Francis Turbine ◽  
Multiparameter Monitoring ◽  
Adjustment System ◽  
Speed Adjustment

Research of the Welding Wire Sending System Based on Fuzzy Adaptive-Adjusting PID Control

2011 ◽  
Vol 271-273 ◽  
pp. 983-986
Author(s):  
Ren He Zhen
Keyword(s):  
Control System ◽  
Dynamic Behavior ◽  
Pid Control ◽  
Control Algorithm ◽  
Closed Loop ◽  
Welding Wire ◽  
Static Behavior ◽  
Adjustment System ◽  
Speed Adjustment ◽  
Fuzzy Adaptive

This article employs single closed loop of voltage negative feedback circle to explore the welding wire sending system of arc welder, as the system of this style has the feature of rough sending and poor dynamic behavior. A double closed loop PWM digit speed adjustment system is proposed based on fussy adaptive-adjusting PID control algorithm. The experiment result indicates that this control system not only has a sound dynamic behavior and static behavior but also has a strong self-adapting behavior, and mostly eliminates the arc flutter made by the rough welding wire sending system.

Belt Conveyor Electromagnetic Speed Adjustment Technology

2012 ◽  
Vol 201-202 ◽  
pp. 458-461
Author(s):  
Yong Sheng Zhang ◽  
Hong Fei Lin ◽  
Guang Zhen Cheng
Keyword(s):  
Speed Control ◽  
Open Loop ◽  
Step Motor ◽  
Control Technology ◽  
Belt Conveyor ◽  
Phase Step ◽  
Three Phase ◽  
Working Principle ◽  
Adjustment System ◽  
Speed Adjustment

The objective of this paper is to provide an adjustable-speed for belt conveyor, which is used for low power occasions, reducing equipment investment. We adopt three-phase step motor to drive and electromagnetic speed control technology to regulate speed. The paper introduces structure of electromagnetic speed Adjustment belt conveyor, the working principle of open-loop electromagnetic speed Adjustment system and closed-loop electromagnetic speed Adjustment system, connection mode of electromagnetic speed motor. The paper points out the characteristics and applied situation of the electromagnetic speed belt conveyor, compared with frequency speed control equipment with high cost, it is appropriate to choose electromagnetic speed control technology when the power consumption is small.

scholarly journals Speed control of the asynchronous motor using LabVIEW

2021 ◽  
Vol 8 (5) ◽  
pp. 59-66
Author(s):  
Petru Livinti ◽  
Keyword(s):  
Fuzzy Logic ◽  
Fuzzy Logic Controller ◽  
Asynchronous Motor ◽  
Speed Control ◽  
Pi Controller ◽  
Motor Speed ◽  
Experimental Stand ◽  
Three Phase ◽  
Adjustment System ◽  
Speed Adjustment

This paper was presented a comparative study on the methods of adjusting the speed of a three-phase asynchronous motor with a rotor in a short circuit. For the same structure of the experimental stand used, two programs were created, implemented, and validated in LabVIEW. For the first method, the program in LabVIEW was made with the PI (proportional-integrative) controller and for the second method, the program in LabVIEW was made with the Fuzzy Logic controller. Following the analysis of the resulting graphs, it was found that the speed control system made with the fuzzy logic controller ensures an increase in its performance compared to the speed control system made with the conventional PI type controller. The indicial responses of the adjustment system of the three-phase asynchronous motor speed with PI controller or Fuzzy Logic controller have been determined in real-time by means of the experimental stand. The override of the speed adjustment system is decreased from the value of 26.9% corresponding to the PI controller to the value of 2.3% corresponding to the Fuzzy Logic controller and the duration of the transient time is decreased from the value of 2.2 s related to the PI controller to the value of 0.5 s, related to the Fuzzy Logic controller. By using the Fuzzy Logic controller, the amount of electrical energy required to supply the electric drive system made with a three-phase asynchronous motor will be reduced. This three-phase asynchronous motor speed adjustment algorithm can be implemented for other electric drive systems from different industrial applications.

scholarly journals On developing an automatic control system for the dump conveyor of a wheel excavator

2020 ◽  
Vol 329 ◽  
pp. 01004
Author(s):  
Yakov Liberman ◽  
Olga Lukashuk
Keyword(s):  
Control System ◽  
Automatic Control ◽  
Fill Factor ◽  
Conveyor Belt ◽  
Maximum Speed ◽  
Rotary Excavator ◽  
Automated Control ◽  
Automated Control System ◽  
Adjustment System ◽  
Speed Adjustment

One of the main ways to increase the rotary excavator productivity is to automate excavator operation. The article presents an automatic speed adjustment system for the stacking conveyor belt of a trench rotary excavator. It is shown that the automated control system will allow taking into account the rotor actual rotation speed and the bucket fill factor, processing data and solving tasks of the excavator operation automatic control in excavation mode. The represented automated control system will ensure the conveyor operation with the necessary, but not maximum speed. Therefore, the conveyor will not work “in vain”, that, in its turn, will reduce operating costs including energy.

The APPliCation of Fuzzy Neural Network Control in the AC Speed Adjustment System

2012 ◽  
Vol 487 ◽  
pp. 166-170
Author(s):  
Yan Lei Jiang ◽  
Han Lian
Keyword(s):  
Network Control ◽  
Simulation Research ◽  
Object A ◽  
Self Study ◽  
Fuzzy Neural ◽  
Adjustment System ◽  
Fuzzy Network ◽  
Speed Adjustment ◽  
Research Show ◽  
Controlled Object

This paper investigates the complex controlled object. A method of fuzzy-network is proposed. Results of simulation research show that the controller has not only high self-study ability, but also high robustness, and let the performance in AC speed adjustment system quickly improve.

Research of Vector Control for Asynchronous Motor System Based on MRAS

2012 ◽  
Vol 531-532 ◽  
pp. 769-772 ◽  
Author(s):  
Qing Hua Yao ◽  
Miao Cao
Keyword(s):  
Motor Control ◽  
Vector Control ◽  
Motor System ◽  
Asynchronous Motor ◽  
Performance Simulation ◽  
Speed Sensor ◽  
Torque Curve ◽  
Electric Equipment ◽  
Adjustment System ◽  
Speed Adjustment

A new speed-adjustment approach of vector control for asynchronous motor is presented in the paper based on MRAS, It adopts a rotate speed calculating module which is designed specifically replaced Conventional rotate speed detecting system. The approach overcomes some shortcomings that comes from the precision and installation of rotate speed sensor. Motor rotate speed and torque curve are observed under different parameters based on MATLAB, and are analysed statically and dynamically. Simulation result showed touque ripple of this speed-adjustment system is small and timing is smooth, which can satisfy the demand of most electric equipment for speed-adjustment performance. Simulation result can realize asynchronous motor Control effectively.

Research on Mechanical Dynamics in DC Servo Motor Adjustment System Based on Applied Technology

2014 ◽  
Vol 908 ◽  
pp. 256-259
Author(s):  
Hong Ying Wang ◽  
Bin Liu
Keyword(s):  
Mathematical Model ◽  
Static Characteristics ◽  
Servo Motor ◽  
Practical Application ◽  
Model And Simulation ◽  
Applied Technology ◽  
Adjustment System ◽  
Mechanical Dynamics ◽  
The Mathematical Model ◽  
Speed Adjustment

This article has made the mathematical model and simulation, and provides the reliable theory basis for practical application of speed adjustment, through the research on DC servo motor adjustment system, and analysis of dynamic and static characteristics of Single loop with current positive feedback and voltage negative feedback speed adjustment system.

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