scholarly journals Proposal for a magnet power supply interface and control chip set

2003 ◽  
Author(s):  
N.J. Dobeck ◽  
J. Perry
Keyword(s):  
Power Supply ◽  
And Control

scholarly journals Design and Research on Power Systems and Algorithms for Controlling Electric Underground Mining Machines Powered by Batteries

Energies ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 4060
Author(s):  
Artur Kozłowski ◽  
Łukasz Bołoz
Keyword(s):  
Power Systems ◽  
Power Supply ◽  
Internal Combustion Engines ◽  
Underground Mining ◽  
Test Stand ◽  
Research Network ◽  
Control Algorithms ◽  
Systems And Control ◽  
And Control ◽  
Supply Systems

This article discusses the work that resulted in the development of two battery-powered self-propelled electric mining machines intended for operation in the conditions of a Polish copper ore mine. Currently, the global mining industry is seeing a growing interest in battery-powered electric machines, which are replacing solutions powered by internal combustion engines. The cooperation of Mine Master, Łukasiewicz Research Network—Institute of Innovative Technologies EMAG and AGH University of Science and Technology allowed carrying out a number of works that resulted in the production of two completely new machines. In order to develop the requirements and assumptions for the designed battery-powered propulsion systems, underground tests of the existing combustion machines were carried out. Based on the results of these tests, power supply systems and control algorithms were developed and verified in a virtual environment. Next, a laboratory test stand for validating power supply systems and control algorithms was developed and constructed. The tests were aimed at checking all possible situations in which the battery gets discharged as a result of the machine’s ride or operation and when it is charged from the mine’s mains or with energy recovered during braking. Simulations of undesirable situations, such as fluctuations in the supply voltage or charging power limitation, were also carried out at the test stand. Positive test results were obtained. Finally, the power supply systems along with control algorithms were implemented and tested in the produced battery-powered machines during operational trials. The power systems and control algorithms are universal enough to be implemented in two different types of machines. Both machines were specially designed to substitute diesel machines in the conditions of a Polish ore mine. They are the lowest underground battery-powered drilling and bolting rigs with onboard chargers. The machines can also be charged by external fast battery chargers.

scholarly journals An Adaptive Differential Protection and Fast Auto-Closing System for 10 kV Distribution Networks Based on 4G LTE Wireless Communication

2019 ◽  
Vol 12 (1) ◽  
pp. 2 ◽  
Author(s):  
Wen An ◽  
Jun Jie Ma ◽  
Hong Yang Zhou ◽  
Hong Shan Chen ◽  
Xu Jun ◽  
...  
Keyword(s):  
Control System ◽  
Wireless Communication ◽  
Power System ◽  
Power Supply ◽  
Distribution Networks ◽  
Fault Isolation ◽  
Differential Protection ◽  
Current Differential Protection ◽  
Protection And Control ◽  
And Control

With the development of wireless communication technology and computer technology, more and more smart technologies have been applied in electricity distribution networks. This paper presents an adaptive current differential protection and fast auto-closing system for application in 10 kV distribution networks in China Southern Power Grid. The current differential protection can adaptively change its settings according to the topology change of the primary distribution networks, thus the system effectively reduces the operation and maintenance cost of the power distribution network. In order to restore the power supply for the healthy part of the 10 kV networks quickly after a power system fault is cleared, the protection and control system provides wide area control function for automatic fault isolation and automatic switching. The traditional overcurrent protection and control system have no fault location function, it may take several minutes or even hours to manually locate a fault and then restore the power supply. Compared with the protection and control system of the traditional 10 kV distribution networks, the system developed can locate and isolate faults within 900 ms (assuming that the operating time of the load switch is 700 ms), and can quickly restore power supply in less than one second after a power system fault is cleared.

Parameter Optimization and System Design of the Welding Power Supply for Resistance-Butt Welding of Nuclear Fuel Rod

2011 ◽  
Vol 201-203 ◽  
pp. 2661-2666
Author(s):  
Fang Quan Chen ◽  
Zu Wei Lin ◽  
Guo Wei Liang
Keyword(s):  
Nuclear Fuel ◽  
Power Supply ◽  
Welding Process ◽  
Capacitor Discharge ◽  
Butt Welding ◽  
Fuel Rod ◽  
Current Curve ◽  
Bridge Rectifier ◽  
And Control ◽  
Welding Power Supply

This paper firstly gives a brief description about the principle of resistance-butt welding of nuclear fuel rod, and it points out that the power supply is a key technology for welding process. According to the welding process and the welded material properties, capacitor discharge power supply is devised as welding power supply. The design of charging circuit of single-phase bridge rectifier with SCR and control circuit is finished. The process of power discharge is simulated and the parameters (capacitance C, charging voltage uc) are optimized with Matlab. By the welding experiments, it shows that the output current curve is suitable for resistance-butt welding of nuclear fuel rods, and the test results of welding samples entirely consistent with process requirements.

Design of a Microcontroller-Based Passive Standby Uninterruptible Power Supply

2001 ◽  
Vol 38 (4) ◽  
pp. 330-337
Author(s):  
M. I. Jahmeerbacus ◽  
K. M. S. Soyjaudah
Keyword(s):  
Power Supply ◽  
Systems Approach ◽  
Top Down ◽  
Uninterruptible Power Supply ◽  
Control Functions ◽  
Uninterruptible Power ◽  
Protection And Control ◽  
And Control

This paper describes the design of a microcontroller-based passive standby Uninterruptible Power Supply (UPS), where the student applies a top-down systems approach to produce a working system. Such a project involves hardware-software co-design for realizing the relatively large number of detection, protection and control functions within the UPS.

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