Heat dissipation design and analysis of high power LED array using the finite element method

2012 ◽  
Vol 52 (5) ◽  
pp. 905-911 ◽  
Author(s):  
Hui Huang Cheng ◽  
De-Shau Huang ◽  
Ming-Tzer Lin
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
High Power ◽  
Heat Dissipation ◽  
The Finite Element Method ◽  
Led Array ◽  
High Power Led ◽  
Element Method

scholarly journals Use of the finite element method for parameter estimation of the circuit model of a high power synchronous generator

2015 ◽  
Vol 63 (3) ◽  
pp. 575-582 ◽  
Author(s):  
S. Berhausen ◽  
S. Paszek
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Parameter Estimation ◽  
High Power ◽  
Synchronous Generator ◽  
Voltage Regulation ◽  
Circuit Model ◽  
The Finite Element Method ◽  
Electromagnetic Parameters ◽  
Element Method

Abstract The paper presents the two-dimensional, field-circuit model of a high power synchronous generator verified by measurements. The model enables determining the waveforms of electromagnetic quantities in steady and transient states. Verification of the model was based on comparison of the measured and calculated waveforms after a disturbance in the voltage regulation system of a TWW-200-2 generator operating in Połaniec Power Plant. There are also presented the field methods for determining electromagnetic parameters (synchronous reactances and time constants) when using the distributions of static and quasi-static, magnetic and electromagnetic fields calculated by the finite element method (FEM). The set of these parameters was used as the starting parameters of the optimization algorithm for estimation of electromagnetic parameters of the synchronous generator circuit model. The dynamic waveforms under the generator load conditions calculated by the finite element method are the basis of parameter estimation. The parameter estimation of the generator model was performed with the use of the least squares method.

scholarly journals Determination of the Leakage Reactance of End Windings of a High-Power Synchronous Generator Stator Winding Using the Finite Element Method

Energies ◽  
2021 ◽  
Vol 14 (21) ◽  
pp. 7091
Author(s):  
Sebastian Berhausen ◽  
Stefan Paszek
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
High Power ◽  
Short Circuit ◽  
Three Dimensional ◽  
Synchronous Generator ◽  
The Finite Element Method ◽  
Synchronous Generators ◽  
Calculation Results ◽  
Element Method

The paper presents a description of the method and the results of calculating the leakage reactance of high-power synchronous generator end windings using the finite element method. This reactance is one of the components of the stator leakage reactance of synchronous generators. The calculations were carried out under the assumption of a three-dimensional field distribution in a synchronous generator. The thus calculated value of the leakage reactance of the end windings was compared with the calculation results obtained using traditional, analytical formulas known from the literature. The analysis of the influence of the reactance value of the end windings on the transient waveforms at a three-phase short-circuit of the stator windings was performed based on a two-dimensional field-circuit model.

Simulation of tuning graphene plasmonic behaviors by ferroelectric domains for self-driven infrared photodetector applications

Nanoscale ◽  
2019 ◽  
Vol 11 (43) ◽  
pp. 20868-20875 ◽  
Author(s):  
Junxiong Guo ◽  
Yu Liu ◽  
Yuan Lin ◽  
Yu Tian ◽  
Jinxing Zhang ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Interfacial Effect ◽  
Infrared Photodetector ◽  
The Finite Element Method ◽  
Ferroelectric Domains ◽  
Element Method

We propose a graphene plasmonic infrared photodetector tuned by ferroelectric domains and investigate the interfacial effect using the finite element method.

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