A Tool for Thermal Analysis of Electronic Boards with Multiple Heat Sources and Sinks

2005 ◽  
Author(s):  
Valeri V. Vlassov
Keyword(s):  
Thermal Analysis ◽  
Heat Sources ◽  
Sources And Sinks

scholarly journals Thermal weakening friction during seismic slip: experiments and models with heat sources and sinks

2020 ◽  
Author(s):  
Stefan Nielsen ◽  
Elena Spagnuolo ◽  
Marie Violay ◽  
Giulio Di Toro
Keyword(s):  
Heat Sources ◽  
Sources And Sinks ◽  
Seismic Slip

Characteristic Aircraft Landing Gear Thermo-Tribo-Mechanical Model

2012 ◽  
Author(s):  
Laurent Heirendt ◽  
Hugh H. T. Liu ◽  
Phillip Wang
Keyword(s):  
Mechanical Model ◽  
Structural Damage ◽  
Shock Absorber ◽  
Thermal Response ◽  
Landing Gear ◽  
Heat Sources ◽  
Sources And Sinks ◽  
Average Temperature ◽  
Aircraft Landing ◽  
Aircraft Landing Gear

A methodology for studying the characteristic thermal response of a landing gear (LG) shock absorber is presented. Rough runways induce high loads on the shock absorber bearings and because of high relative sliding speeds of the shock absorber piston, heat is dissipated which is known to have led to structural damage. In this work, an overall model has been developed that is used to outline the characteristics of the thermal behavior and identify the heat sources and sinks in the landing gear shock absorber. The developed thermo-tribo-mechanical model (TTM model) is subdivided into four parts, all using simplified but representative equations. Emphasis is placed on developing a methodological framework and studying the evolution of the average temperature in the TZI (thermal zone of interest) while taxiing and taking-off.

Conjugate Thermal Analysis of Air-Cooled Discrete Flush-Mounted Heat Sources in a Horizontal Channel

2011 ◽  
Vol 133 (4) ◽  
Author(s):  
Jing He ◽  
Liping Liu ◽  
Anthony M. Jacobi
Keyword(s):  
Heat Transfer ◽  
Thermal Analysis ◽  
Hot Spot ◽  
Horizontal Channel ◽  
Bottom Surface ◽  
Comprehensive Treatment ◽  
Heat Sources ◽  
Surface Emissivity ◽  
Thick Substrate ◽  
Uniform Temperature Field

Thermal analysis with comprehensive treatment of conjugate heat transfer is performed in this study for discrete flush-mounted heat sources in a horizontal channel cooled by air. The numerical model accounts for mixed convection, radiative exchange and two-dimensional conduction in the substrate. The model is first used to simulate available experimental work to demonstrate its accuracy and practical utility. A parametric study is then undertaken to assess the effects of Reynolds number, surface emissivity of walls and heat sources, as well as thickness and thermal conductivity of substrate, on flow field and heat transfer characteristics. It is shown that due to radiative heat transfer, the wall temperatures are brought closer, and the trend of temperature variation along the top wall is significantly altered. Such effects are more pronounced for higher surface emissivity and/or lower Reynolds numbers. The influence of substrate conductivity and thickness is related in that a large value of either substrate conductivity or thickness facilitates redistribution of heat and tends to yield a uniform temperature field in the substrate. For highly conductive or thick substrate, the “hot spot” cools down and may occur in upstream sources. Radiation loss to the ambient increases with substrate conductivity and thickness due to the elevated temperature near the openings, yet the total heat transfer over the bottom surface by convection and radiation remains essentially unaltered.

scholarly journals Induction Motor Thermal Analysis Based on Lumped Parameter Thermal Network

2020 ◽  
Author(s):  
Pedro Cabral ◽  
Amel Adouni
Keyword(s):  
Thermal Analysis ◽  
Induction Motor ◽  
Operating Conditions ◽  
Heat Sources ◽  
Thermal Network ◽  
Iron Losses ◽  
Lumped Parameter ◽  
Proposed Model ◽  
Industry Applications ◽  
Different Temperatures

Many industry applications required the use of the induction motors. In such envirenement the electrical machines are facing of many stressed operating conditions. One of the critical creteria which decide the choice of the induction motor is the thermal behaviour under different mode operation. In this paper a study of the thermal behavior of an induction motor is presented. In order to predict the temperature in the different machine components, a model based on the lumped parameter thermal network   has been developed. The geometry of the machine and the thermal properties of its various components are used to express the developed model. The joule and the iron losses are considering as the inputs. The proposed model is implemented and tested using MATLAB software. It is a simple model which could predict rapidly the different temperatures. Keywords: Induction motor, Thermal analysis, Lumped parameters thermal network, Modeling, Heat sources

scholarly journals Electromagnetic and Thermal Analysis of a Permanent Magnet Motor Considering the Effect of Articulated Robot Link

Energies ◽  
2020 ◽  
Vol 13 (12) ◽  
pp. 3239
Author(s):  
Phuong Thi Luu ◽  
Ji-Young Lee ◽  
Ji-Heon Lee ◽  
Jung-Woo Park
Keyword(s):  
Thermal Analysis ◽  
Permanent Magnet ◽  
Permanent Magnet Synchronous Motor ◽  
Core Loss ◽  
Thermal Characteristics ◽  
Heat Sources ◽  
Permanent Magnet Motor ◽  
Copper Loss ◽  
Lumped Parameter ◽  
Articulated Robot

This paper presents the electromagnetic and thermal characteristics of a permanent magnet synchronous motor (PMSM) in a joint actuator which is used for articulated robot application. In an attempt to design a compact PMSM for the articulated robot, robot link should be taken into consideration during the motor design process as it can reduce the temperature distribution on motor, thus reducing the volume of the motor. A lumped-parameter thermal model of PMSM with and without a link is proposed considering the core loss, copper loss, and mechanical loss as heat sources. The electromagnetic and thermal analysis results are well confirmed by the experiment in a 400 W 20-pole/24-slot PMSM. The experiment results show that the robot link helps to reduce the motor end-winding temperature by about 40%, and this leads to an increase in power density of the motor.

SEM / SThM-Hybrid-System: A New Tool for Advanced Thermal Analysis of Electronic Devices

2002 ◽  
Author(s):  
A. Altes ◽  
R. Heiderhoff ◽  
L.J. Balk ◽  
I. Joachimsthaler ◽  
G. Zimmermann
Keyword(s):  
Thermal Analysis ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Hybrid System ◽  
Electronic Devices ◽  
Heat Sources ◽  
System A ◽  
Scanning Electron

Abstract A resistive probe based Scanning Thermal Microscope (SThM) was implemented in an analysis chamber of a Scanning Electron Microscope (SEM). By means of this hybrid-system thermal device, specific characteristics are detectable. Variable punctual heat sources can be simulated and the influence of ambient parameters can be investigated.

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