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 Thermal Study of Three-Phase Squirrel Cage Induction Motor with the Open-Phase Fault Operation Using a Lumped Parameter Network (LPTN)

2021 ◽  
Vol 23 (2) ◽  
pp. 87-94
Author(s):  
Mahdi Atig ◽  
Mustapha Bouheraoua ◽  
Rabah Khaldi
Keyword(s):  
Induction Motor ◽  
Convection Heat Transfer ◽  
Experimental Tests ◽  
Operating Conditions ◽  
Thermal Network ◽  
Squirrel Cage ◽  
Lumped Parameter ◽  
Squirrel Cage Induction Motor ◽  
Three Phase ◽  
Cage Induction Motor

The aim of this paper is to estimate the induction motor temperature at both steady and transient thermal states under healthy and faulty conditions. The distribution of the temperature in the motor is calculated using thermal models based on the 2D Lumped Parameter Thermal Network (LPTN). The thermal model takes into account the heat sources, convection heat transfer and the thermal resistances in the motor. The heat flow generated by the conduction and convection in a three-phase squirrel cage induction motor is discussed. The developed model is used to study the motor thermal behavior during the opening phase situation. The results obtained by the model developed are validated by experimental tests. The tested machine is a standard three-phase, 4-pole, 2.2 kW, 380 V squirrel cage induction motor of Totally Enclosed Fan Cooled “TEFC” design manufactured in Algeria by Electro-Industries company. The simulated temperatures so obtained are in good agreement with the measured ones, and the 2D Lumped Parameter Thermal Network study seems to be appropriate to characterize the heating of the active parts of the machine under different operating conditions.

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.

scholarly journals Ageing of Aluminum Power Connectors Based on Current Cycle Test

2019 ◽  
Vol 4 (1) ◽  
pp. 110-114 ◽  
Author(s):  
Ghareeb Moustafa
Keyword(s):  
Contact Resistance ◽  
Temperature Rise ◽  
Operating Conditions ◽  
Heat Sources ◽  
Thermal Network ◽  
Network Method ◽  
Current Cycle ◽  
Thermal Network Method ◽  
Lower Temperature ◽  
A Current

The effect of current cycle on the behavior of contact resistance of clamped connectors was investigated experimentally to characterize the thermal behavior of the used clamped connector and optimizing the installation procedure in order to reduce contact resistance and ensure a lower temperature during normal operating conditions. The thermal network method is used for calculating the temperature rise of the connector when loaded by a current. The method is based on substitution of the connector geometry by a circuit consisting of thermal resistances, capacitance and heat sources. The temperature rise is determined using the network simulation program PSPICE with the corresponding thermal model libraries. The validity of the obtained results has been checked by comparing the computed values with those measured experimentally. The agreement was found satisfactory

Thermal analysis of a three-phase induction motor based on motor-CAD, flux2D, and matlab

2019 ◽  
Vol 15 (1) ◽  
pp. 48
Author(s):  
Afrah Thamer Abdullah ◽  
Amer Mejbel Ali
Keyword(s):  
Thermal Analysis ◽  
Induction Motor ◽  
Heat Sources ◽  
Squirrel Cage ◽  
Software Methodology ◽  
Precise Knowledge ◽  
Three Phase ◽  
Network Method ◽  
Thermal Network Method ◽  
Good Agreement

This paper adopted a thermal network method (TNM) based on  Motor-CAD software, and Matlab/SIMULINK, with finite element method (FEM) based on Flux2D software to perform a thermal analysis of a totally enclosed fan-cooled (TEFC), squirrel cage, three-phase induction motor. The thermal analysis is achieved based on a precise knowledge of the test motor geometry, materials, and heat sources (losses). The estimation of heat distribution inside the test motor by this three software is done successfully with a good agreement between its results. The proposed triple-software methodology for this work can be adopted from the motor designer instead of using an experimental test based on a real motor.

A Compartmental Model for Supercritical Coal-Fired Boiler Systems

2014 ◽  
Vol 136 (2) ◽  
Author(s):  
Longzhou Qi ◽  
Shuhong Huang ◽  
Yanping Zhang ◽  
Xing Xu ◽  
Yu Li ◽  
...  
Keyword(s):  
Compartmental Model ◽  
Model Simulation ◽  
Control Strategies ◽  
Operating Conditions ◽  
Parameter Method ◽  
Lumped Parameter ◽  
Proposed Model ◽  
Simulation Results ◽  
Model Features ◽  
Lumped Parameter Method

A compartmental furnace model for supercritical coal-fired boiler systems is presented in this paper. Instead of the traditional lumped parameter method, the furnace is divided to seven compartments along the height based on the positions of the burner groups. The lower six compartments correspond to the six groups of burners, respectively. This model provides the possibility to connect the pulverization system and the furnace, the variability of the combustion property caused by changes of the pulverization system can be studied by switching the operating conditions. To evaluate the proposed model, simulation results are compared with available data from a 600 MW supercritical coal-fired boiler and reasonably good agreement is achieved. The simulation results also show that the compartmental model features a better precision than the lumped parameter modeling. This model allows for evaluating different control strategies and subsequently proposing optimization strategies for boiler system operation.

Thermal Analysis of Duplex Three-Phase Induction Motor Under Fault Operating Conditions

2013 ◽  
Vol 49 (4) ◽  
pp. 1523-1530 ◽  
Author(s):  
Mircea Popescu ◽  
David George Dorrell ◽  
Luigi Alberti ◽  
Nicola Bianchi ◽  
David Alan Staton ◽  
...  
Keyword(s):  
Thermal Analysis ◽  
Induction Motor ◽  
Operating Conditions ◽  
Three Phase

scholarly journals An Improved LPTN Method for Determining the Maximum Winding Temperature of a U-Core Motor

Energies ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1566
Author(s):  
Bin Li ◽  
Liang Yan ◽  
Wenping Cao
Keyword(s):  
Heat Flux ◽  
Heat Source ◽  
Heat Dissipation ◽  
Temperature Drop ◽  
Maximum Temperature ◽  
Heat Sources ◽  
Heat Generator ◽  
Thermal Network ◽  
Lumped Parameter ◽  
Flux Change

In a traditional lumped-parameter thermal network, no distinction is made between the heat and non-heat sources, resulting in both larger heat flux and temperature drop in the uniform heat source. In this paper, an improved lumped-parameter thermal network is proposed to deal with such problems. The innovative aspect of this proposed method is that it considers the influence of heat flux change in the heat source, and then gives a half-resistance theory for the heat source to achieve the temperature drop balance. In addition, the coupling relationship between the boundary temperature and loading position of the heat generator is also added in the lumped-parameter thermal network, so as to amend the loading position and nodes’ temperature through iterations. This approach breaks the limitation of the traditional lumped-parameter thermal network: that the heat generator can only be loaded at the midpoint, which is critical to determining the maximum temperature in asymmetric heat dissipation. By adjusting the location of heat generator and thermal resistances of each branch, the accuracy of temperature prediction is further improved. A simulation and an experiment on a U-core motor show that the improved lumped-parameter thermal network not only achieves higher accuracy than the traditional one, but also determines the loading position of the heat generator well.

Lumped parameter modelling for the thermal analysis of the launch vehicle Vega C

2018 ◽  
Vol 90 (3) ◽  
pp. 542-558
Author(s):  
Mattia Olivero ◽  
Matteo Ferrai ◽  
Piero Pantaleone ◽  
Ivan Perkovic ◽  
Antonella D’Amato ◽  
...  
Keyword(s):  
Thermal Analysis ◽  
Thermal Protection ◽  
Time Frame ◽  
Launch Vehicle ◽  
Operating Conditions ◽  
Lumped Parameter Model ◽  
Content Type ◽  
Flight Phase ◽  
Second Stage ◽  
Lumped Parameter

Purpose This activity dealt with the thermal analysis of the launch vehicle Vega C through a lumped parameter model. The Vega C is the upgrade of the actual launch vehicle Vega within the Vega Consolidation and Evolution Program, whose objective is to develop a consolidated – hence the C – version of the Vega by 2020. The main aim of the study was verifying the thickness of the external thermal protection of the launch vehicle, such that the structure and equipment temperatures were kept within their operating ranges. Design/methodology/approach The analysis has been performed by means of ESATAN–TMS during a time-frame that included the stand-by on ground phase and a flight phase up to the separation of the second stage from the third one. Two operating conditions have been considered, i.e. the worst hot and worst cold cases. The study has been divided as follows: geometry definition through spatial discretization; application of materials and optical properties; application of thermal loads; thermal analysis; and post-processing of the results in ThermNV. Findings It was concluded that the calculated temperatures were within the supposed project specifications, while their trends reflected the expected behavior. Originality/value During the flight phase, the mutual separation of the investigated stages has been explicitly modelled through a routine specifically developed for this purpose. Therefore, the submodels of each stage have been disabled at the correct instant according to the known time-sheet.

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