Dynamic formation of time-dependent duty cycles for a three-phase boost-type DC-AC converter based on averaging model

2016 ◽  
Author(s):  
B. Eskandari ◽  
J. Javidi Hagh ◽  
J. Shojaee ◽  
M. Tavakoli Bina
Keyword(s):  
Time Dependent ◽  
Duty Cycles ◽  
Three Phase ◽  
Dynamic Formation

Duty Cycles for Three-Phase of Three-Phase Matrix Converters

2011 ◽  
Vol 131 (9) ◽  
pp. 1173-1174 ◽  
Author(s):  
Inami Asai ◽  
Takaharu Takeshita
Keyword(s):  
Matrix Converters ◽  
Duty Cycles ◽  
Three Phase

Optimized Modulation and Dynamic Control of a Three-Phase Dual Active Bridge Converter With Variable Duty Cycles

2019 ◽  
Vol 34 (3) ◽  
pp. 2856-2873 ◽  
Author(s):  
Jun Huang ◽  
Zhuoqiang Li ◽  
Ling Shi ◽  
Yue Wang ◽  
Jinda Zhu
Keyword(s):  
Dynamic Control ◽  
Dual Active Bridge ◽  
Duty Cycles ◽  
Three Phase

Three Phase CFD-Simulation of CAS-OB Ladle

2013 ◽  
Vol 762 ◽  
pp. 248-252 ◽  
Author(s):  
Timo Kulju ◽  
Seppo Ollila ◽  
Riitta L. Keiski ◽  
Esa Muurinen
Keyword(s):  
Complex System ◽  
Experimental Data ◽  
Temperature Control ◽  
Molten Steel ◽  
Cfd Simulation ◽  
Slag Layer ◽  
Time Dependent ◽  
Layer Boundary ◽  
Three Phase ◽  
Mesh Adaption

In the production of steel, the CAS-OB process is used for composition adjustment, temperature control and removal of various dissolved impurities. In this work we have studied the CAS-OB process with CFD and focused on the behavior of the slag layer, which is produced on the top of molten steel. Dynamic mesh adaption has been applied to resolve the slag layer boundary in a detailed way. As a result the time dependent evolution of the slag layer is presented. The chosen approach to describe the process offers an effective and promising way to study this complex system. In the future this model will be validated against experimental data.

Numerical Calculation of Mass Transfer With Heterogeneous Chemical Reactions in Three-Phase Bubble Columns

2007 ◽  
Author(s):  
Dieter Mewes ◽  
Dierk Wiemann
Keyword(s):  
Balance Equation ◽  
Bubble Column ◽  
Three Dimensional ◽  
Population Balance ◽  
Kernel Functions ◽  
Time Dependent ◽  
Bubble Coalescence ◽  
Population Balance Equation ◽  
Heterogeneous Chemical ◽  
Three Phase

Bubble column reactors are used for several processes in the chemical industry, e.g. hydrogenation or oxidation reactions. At the bottom of the reactor a gaseous phase is dispersed into a continuous liquid phase with suspended particles. The resulting bubble swarm induces three-dimensional, time-dependent velocity and concentration fields, which are predicted numerically. All phases are described by an Eulerian approach. The numerical calculations of the local interfacial area density and the interphase transfer terms for mass and momentum are based on a population balance equation approach which enables an effective way to couple population balance and computational fluid dynamics. In three-phase gas-liquid-solid flow particles with diameters of 100 μm are considered as catalyst for a heterogeneous chemical reaction. The influence of particles on bubble coalescence has been investigated in order to extend an existing model for the kernel functions in the population balance equation describing bubble coalescence and dispersion. The resulting three-dimensional, time-dependent velocity and concentration fields are described and graphically presented for the hydrogenation of anthra-chinone.

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