scholarly journals A Positive Flow Control System for Electric Excavators Based on Variable Speed Control

2020 ◽  
Vol 10 (14) ◽  
pp. 4826
Author(s):  
Shengjie Fu ◽  
Zhongshen Li ◽  
Tianliang Lin ◽  
Qihuai Chen ◽  
Haoling Ren
Keyword(s):  
Control System ◽  
Energy Saving ◽  
Electric Drive ◽  
Flow System ◽  
Control Process ◽  
Pump Current ◽  
Low Noise ◽  
Variable Speed ◽  
Hydraulic Pump ◽  
Construction Machinery

Energy conservation and emission reduction of construction machinery are the focus of current research. The traditional excavator, whose hydraulic pump is driven by the engine, has high fuel consumption and emissions. Furthermore, it is difficult to match the working point of the engine to that of the hydraulic pump. Current pure electric drive technology has the advantages of zero pollution and low noise, and the motor used has the advantages of fast response and a wide speed range. Based on the characteristics of the pure electric drive technology, a positive flow system based on variable speed constant displacement instead of a variable displacement pump for pure electric construction machinery is put forward to realize the flow-matching of the whole machine. The basic structure and working principle were introduced. The control process was analyzed. The controllability and energy saving of the proposed system were tested through simulation and experimental analysis. The research results showed that the controllability of the proposed positive flow system was comparable to that of the traditional throttling speed-regulating control system. The energy-saving efficiency of the proposed positive flow system is increased by 35.2% compared to that of the tradition control system. To further exploit the strong overload capacity of electric motors of electric construction machinery and solve the insufficient power under sudden load, research on constant power control will be carried out in the future.

Design of Control System for Concrete Mixing Station Based on PLC and Touch Screen

2011 ◽  
Vol 317-319 ◽  
pp. 2473-2476
Author(s):  
Huan Zhang
Keyword(s):  
Control System ◽  
Energy Saving ◽  
Touch Screen ◽  
Automatic Production ◽  
Construction Machinery ◽  
Practical Operation ◽  
And Control ◽  
Technology Processes ◽  
Control Accuracy ◽  
Concrete Mixing Station

On the basis of analyzing technology processes and control demands of concrete mixing station, a design of control system for this construction machinery based on SIEMENS S7-300 PLC and eView touch screen was introduced in this paper, including hardware selection, PLC LAD diagram programming and HMI design, etc. All expected demands for weighing, batching, deposit, mixing, unloading, conveying of the whole technology processes of concrete mixing are reached, and a totally automatic production can be realized also. The practical operation verifies that the control system is highly reliable and stable, and it greatly enhances the control accuracy and meets the equipments requirements of energy-saving.

Development of a S-FLOW System and Control (S‑FLOW: Energy Saving Air Flow Control System)

2013 ◽  
Author(s):  
Koichi Tabei ◽  
Masashi Watanabe ◽  
Nobuyuki Doi ◽  
Kenjiro Imai ◽  
Stefan Young
Keyword(s):  
Control System ◽  
Flow Control ◽  
Energy Saving ◽  
Flow System ◽  
Air Flow ◽  
Flow Energy ◽  
Flow Control System ◽  
And Control ◽  
Air Flow Control

Energy Regulation Based Close-Loop Variable-Speed Valve-Controlled-Motor System

2011 ◽  
Vol 328-330 ◽  
pp. 1904-1907
Author(s):  
Ming Xu ◽  
Bo Jin
Keyword(s):  
Control System ◽  
Energy Saving ◽  
Motor System ◽  
Safety Valve ◽  
Energy Regulation ◽  
Variable Speed ◽  
Throttle Valve ◽  
New Energy ◽  
Valve Control ◽  
Loop Scheme

A new energy-saving method with an energy regulation device (ERD) is presented. The ERD is composed of an accumulator, a proportional throttle valve and a safety valve. Due to the addition of the proportional throttle valve, the ERD becomes a flow-controllable element. It can adjust energy according to the system demand. The principle of energy regulation based close-loop variable-speed valve-controlled-motor is discussed in detail. And it can be conclude that the proposed close-loop scheme can gain a good response as the valve control system while the power is less obviously.

Simulation on the Energy Saving Control Model of Large-Scale Power Control

2014 ◽  
Vol 602-605 ◽  
pp. 1190-1193
Author(s):  
Rui Xiang Fan ◽  
Wei Xia ◽  
Bin Liu
Keyword(s):  
Genetic Algorithms ◽  
Control System ◽  
Energy Consumption ◽  
Power Control ◽  
Energy Saving ◽  
Large Scale ◽  
Design Method ◽  
Control Process ◽  
Control Model ◽  
Energy Saving Control

During the large transformers operation, the proportion of the non-essential energy consumption is higher. In order to reduce the energy consumption in power control process, a new design method of energy-saving control in large-scale power control process based on adaptive linear genetic algorithms. Loss model of power control is established firstly. Based on the relevant data of the model, energy-saving control in large-scale power control process can be achieved. Experimental results show that the improved algorithm can effectively reduce the energy consumption in large-scale power control system, and meet the actual demand of power control.

Energy-saving technologies for construction machinery: a review of electro-hydraulic pump-valve coordinated system

2020 ◽  
Vol 21 (5) ◽  
pp. 331-349
Author(s):  
Zhe-ming Tong ◽  
Shuang-shuang Wu ◽  
Shui-guang Tong ◽  
Yu-qing Yue ◽  
Yuan-song Li ◽  
...  
Keyword(s):  
Energy Saving ◽  
Hydraulic Pump ◽  
Construction Machinery ◽  
Pump Valve

scholarly journals Power antenna radar with variable speed

2015 ◽  
pp. 81-87
Author(s):  
V. F. Strelkov ◽  
M. V. Andryushin ◽  
V. V. Vanyev
Keyword(s):  
Mathematical Model ◽  
Control System ◽  
Electric Drive ◽  
Electric Motor ◽  
Permanent Magnets ◽  
Performance Characteristics ◽  
Variable Speed ◽  
Motor Shaft ◽  
Radar Antenna ◽  
And Control

A mathematical model of the "mains - regulated electric drive" radar antenna us with a synchronous motor with permanent magnets. Peculiarities of work at a controlled electric variable speed electric motor shaft. A method and control system with motorized adjustable mechanical and electronic scanning of the antenna, improving performance characteristics of radar stations.

Classroom Lighting Energy-Saving Control System Based on Machine Vision Technology

2018 ◽  
pp. 143-149 ◽  
Author(s):  
Ruijie CHENG
Keyword(s):  
Control System ◽  
Machine Vision ◽  
Energy Saving ◽  
Back Propagation ◽  
Back Propagation Neural Network ◽  
Lighting Control ◽  
Lighting Energy ◽  
Neural Network Algorithm ◽  
Energy Saving Control ◽  
Model Algorithm

In order to further improve the energy efficiency of classroom lighting, a classroom lighting energy saving control system based on machine vision technology is proposed. Firstly, according to the characteristics of machine vision design technology, a quantum image storage model algorithm is proposed, and the Back Propagation neural network algorithm is used to analyze the technology, and a multi­feedback model for energy­saving control of classroom lighting is constructed. Finally, the algorithm and lighting model are simulated. The test results show that the design of this paper can achieve the optimization of the classroom lighting control system, different number of signals can comprehensively control the light and dark degree of the classroom lights, reduce the waste of resources of classroom lighting, and achieve the purpose of energy saving and emission reduction. Technology is worth further popularizing in practice.

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