scholarly journals Accurate evaluation of cooling system capability of three-phase IGBT-based inverter

2021 ◽  
Vol 7 (1) ◽  
pp. 73-78
Author(s):  
Dan Zheng ◽  
Puqi Ning ◽  
Xiaoguang Chai ◽  
Wei Sun ◽  
Zhijie Qiu ◽  
...  
Keyword(s):  
Cooling System ◽  
Accurate Evaluation ◽  
Three Phase ◽  
System Capability

Efficiency of Application of Evaporative Cooling of Graphite Electrodes to Reduce their Consumption in Arc Furnaces

2019 ◽  
Vol 946 ◽  
pp. 444-449 ◽  
Author(s):  
Igor M. Yachikov ◽  
Irina V. Portnova ◽  
Mikhail V. Bystrov
Keyword(s):  
Direct Current ◽  
Thermal State ◽  
Cooling System ◽  
Evaporative Cooling ◽  
Graphite Electrodes ◽  
Arc Furnaces ◽  
Three Phase ◽  
Evaporative Cooling System ◽  
The Cost ◽  
Small Capacity

A significant part of the cost of released products in the smelting of steel is the cost of graphite electrodes, so reducing their specific consumption is an urgent task. The aim of the work is to study on a computer model and analyze the efficiency of using evaporative cooling to reduce the consumption of graphite electrodes in electric arc furnaces of three-phase alternating and direct current of small capacity. A computer simulation of the thermal state and fame of graphite electrodes for arc furnaces of three-phase and direct current with the capacity of 12 tons was performed. The efficiency of using evaporative cooling of graphite electrodes was revealed. It is established that for arc furnaces operating on direct and three-phase alternating current, the use of electrodes water cooling allows to reduce the consumption of graphite by about one and a half times. It is established that the water supply to the evaporative cooling system is the most rational during 1–2 minutes after the current is turned on. The use of evaporative cooling of graphite electrodes in arc furnaces can be recommended to reduce their consumption on operating and designed small capacity alternating and direct current arc furnaces.

Study on Intelligent Monitoring for Cooling System of Power Transformer

2013 ◽  
Vol 655-657 ◽  
pp. 1440-1444
Author(s):  
Guo Jin Chen ◽  
Ming Xu ◽  
Ting Ting Liu ◽  
Jing Ni ◽  
Dong Xie ◽  
...  
Keyword(s):  
High Performance ◽  
Environmental Control ◽  
Cooling System ◽  
Power Transformer ◽  
Integrated Design ◽  
Advanced Technology ◽  
Intelligent Monitoring ◽  
Electrical Grid ◽  
Three Phase ◽  
State Relay

On the basis of studying the transformer condition assessment, the paper put forward the monitoring framework of the transformer cooler based on the intelligent electrical grid, and developed the intelligent monitoring system of the transformer cooler based on the DCS and dual PLC. The system used the DCS and dual PLC redundancy, the intelligent controller of the motor, the system’s platform for the centralized monitoring, the environmental control system and the other advanced technology, and implemented the monitoring, remote control and status monitoring of the transformer cooling system to improve the reliability and adaptability of the transformer cooler system. The system can be applied for the intelligent electrical grid. The above technologies are innovative in the high-performance distributed bus, the integrated design of three-phase solid state relay and magnetic latching relay and the cooling technology of the semiconductor in the PLC module, and lie in the leading domestic level.

scholarly journals Five-Level Single Source Voltage Converter Controlled Using Selective Harmonic Elimination

2018 ◽  
Vol 12 (3) ◽  
pp. 924 ◽  
Author(s):  
Ibrahim Haruna Shanono ◽  
Nor Rul Hasma Abdullah ◽  
Aisha Muhammad
Keyword(s):  
Cooling System ◽  
Control Function ◽  
Voltage Source ◽  
Energy Applications ◽  
Harmonic Elimination ◽  
Three Phase ◽  
Selective Harmonic Elimination ◽  
Converter Topology ◽  
Single Input ◽  
Source Voltage

The paper presents a 5-level cascaded H-bridge voltage source inverter. The converter topology composed of two-cascaded H-bridge modules connected in parallel and powered by a single DC source. The benefit of this topology in comparison with the conventional H-Bridge configuration is that it uses single input DC source instead of two to achieve the same output steps/levels. Selective Harmonic Elimination (SHE) is the modulation technique employed. The generated non-linear transcendental equations are solved using an optimised Genetic algorithms to find the switching angles. This property makes the topology and the control function suitable for three phase applications where triplen harmonics are said to cancel out at the line-to-line voltages. This concept of SHE modulation extends the value of the filter cut-off frequency, which translates to smaller sized filter, compact cooling system and reduced system weight. This advantage makes the topology attractive to automotive and renewable energy applications. The topology was simulated using PSIM software.

Mesoscopic Numerical Simulation of Temperature Crack with Non-Uniform Temperature Distribution in Concrete

2013 ◽  
Vol 477-478 ◽  
pp. 1014-1018 ◽  
Author(s):  
Yin Duan ◽  
Chao Zhang ◽  
Xiaolin Chang
Keyword(s):  
Temperature Distribution ◽  
Crack Propagation ◽  
Cooling System ◽  
Mass Concrete ◽  
Uniform Temperature ◽  
Heterogeneous Model ◽  
Uniform Temperature Distribution ◽  
Three Phase ◽  
Propagation Law ◽  
Random Aggregate

The heat-fluid coupling method is introduced to perform the thermal analysis of a pipe cooling system in mass concrete structures, to precisely simulate the distribution of temperature. The heterogeneous mesoscopic mechanical model based on the random aggregate-interface-mortar three-phase concrete is established. And numerical experiments of concrete water process are taken with a three-phase heterogeneous model, so as to actually simulate the whole crack propagation process considering non-uniform temperature distribution, and then explore the crack propagation law, generating mechanism and comprehensive understand the factors and process of the concrete temperature cracks under complex conditions.

scholarly journals Power losses estimation and heat distribution in three-phase inverter using IGBT semiconductors

2020 ◽  
Vol 15 ◽  
Keyword(s):  
Cooling System ◽  
Heat Distribution ◽  
Simulation Approach ◽  
Power Losses ◽  
Fast Estimation ◽  
Design Time ◽  
Three Phase ◽  
Power Inverters ◽  
Simulation Results ◽  
Three Phase Inverter

Power loss estimation is a very crucial step in the design of power inverters and other power converters. In this paper, the estimation of power losses using MATLAB Simulink is presented. This approach allows fast estimation of losses and can lower the design time of the cooling system. With the use of a simulation approach, different parameters can be simulated to estimate losses and design the best cooling solution accurately. Characteristics of the used semiconductor in this case IGBT is used and imported to the electro-thermal simulation. This simulation consists of two main parts. The first component calculates semiconductor losses depends on the provided characteristics of the used device and his temperature. The second model calculates temperature based on the thermal model and losses produced by the first part of the simulation. Results in the form of the losses are implemented to the heat distribution simulation using Fusion 360 to simulate the temperature distribution of the used heatsink.

CAD for three phase ONAN cooling system transformers

2015 ◽  
Author(s):  
Robert-Constantin Dragomir ◽  
Ioan-Dragos Deaconu ◽  
Aurel-Ionut Chirila ◽  
Anca-Simona Deaconu ◽  
Valentin Navrapescu
Keyword(s):  
Cooling System ◽  
Three Phase

High-Voltage Three-Phase Asynchronous Motor Soft-Starter via Hyristor for Water Cooling System of Steel Mill

2014 ◽  
Vol 496-500 ◽  
pp. 1477-1480
Author(s):  
Yong Yang ◽  
Ming Yang
Keyword(s):  
High Voltage ◽  
Cooling System ◽  
Asynchronous Motor ◽  
Water Hammer ◽  
Water Cooling ◽  
Steel Mill ◽  
Soft Starter ◽  
Three Phase ◽  
Water Cooling System ◽  
Water Hammer Effect

This article introduces a high-voltage three-phase asynchronous motor soft-starter via thyristor that is suitable for water cooling system of steel mill. It improves motor start and stop characteristics, effectively eliminates water-hammer" effect caused by traditional direct start and stop, and is making more and more important positive impacts in the water cooling system of steel mill.

scholarly journals Analysis of the Temperature Characteristics of Three-Phase Coaxial Superconducting Power Cable according to a Liquid Nitrogen Circulation Method for Real-Grid Application in Korea

Energies ◽  
2019 ◽  
Vol 12 (9) ◽  
pp. 1740 ◽  
Author(s):  
Seok-Ju Lee ◽  
Hae-Jin Sung ◽  
Minwon Park ◽  
DuYean Won ◽  
Jaeun Yoo ◽  
...  
Keyword(s):  
Power Transmission ◽  
Cooling System ◽  
Thermal Design ◽  
Circulation System ◽  
Magnetic Shielding ◽  
Power Cable ◽  
Power Cables ◽  
Superconducting Layer ◽  
Longitudinal Temperature ◽  
Three Phase

Large-capacity superconducting power cables are in the spotlight to replace existing underground transmission power cables for energy power transmission. Among them, the three-phase coaxial superconducting power cable has the economic advantage of reducing the superconducting shielding layer by enabling magnetic shielding when the three phases are homogeneous without an independent superconducting shielding layer for magnetic shielding. In order to develop the three-phase coaxial superconducting power cable, the electrical and structural design should be carried out to construct the superconducting layer. However, the thermal design and analysis for the cooling of the three-phase coaxial superconducting power cable must be done first, so that the electrical design can be made using the temperature transferred to the superconducting layer. The three-phase coaxial superconducting cable requires a cooling system to circulate the cryogenic refrigerant for cooling below a certain temperature, and the structure of the cable through which the cryogenic refrigerant travels must also be analyzed. In this paper, the authors conducted a longitudinal temperature analysis according to the structure of the refrigerant circulation system of the cable and proposed a refrigerant circulation system suitable for this development. The temperature profile according to this analysis was then used as a function of temperature for the electrical (superconducting and insulating layers) design of the three-phase coaxial superconducting power cable. It is also expected to be used to analyze the cooling structure of the three-phase coaxial superconducting power cable installed in the real grid system.

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