Dynamic modeling of induction motor taking into account thermal stresses (original) (raw)
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Yamila A. Orrego received the B.S. and M.S. degrees in industrial engineering from the University of Buenos Aires, Buenos Aires, Argentina, in 1998 and 2000, respectively. From 2001 to 2007, she held different engineering positions with Schlumberger Oilfield Services based in several countries in South America, Africa, and Asia. She is currently with Chevron Energy Technology Company, Houston, TX, and specializes in artificial lift methods.
IJERT-Thermal Stress Analysis of DC Motor using Finite Element Method
International Journal of Engineering Research and Technology (IJERT), 2014
https://www.ijert.org/thermal-stress-analysis-of-dc-motor-using-finite-element-method https://www.ijert.org/research/thermal-stress-analysis-of-dc-motor-using-finite-element-method-IJERTV3IS090304.pdf The rating of electrical devices such as machines and transformers is often determined by Mechanical and thermal considerations. For example the maximum winding current is typically determined by the maximum temperature, which the insulation can withstand without damage as excessive loss of life. Similarly the maximum speed of a motor or generator is typically determined by mechanical considerations related to the structural integrity of the rotor or performance of the bearings. In converting from electrical to mechanical energy, the wastage of energy is inevitable, some of energy being degraded into heat. In dynamo electrical machinery, loss of energy occurs in electrical circuits and those portions of magnetic circuits that are subjected to varying magnetization. The temperature rise resulting across the sections named as rotor and stator is therefore a major factor in the rating of an electric motor. In order to keep the operating temperature within the limits, the electric motor should dissipate the heat at the same rate as it was produced. As long as the temperature rise does not exceed a specified value, the actual thermal condition of the motor mainly influence how long the motor will lost, because the life of the motor highly depends on the life of the insulation. A sustained 10 0 c increase temperature reduces the insulation life approximately 50%. After detailed analysis, insulation thickness of 0.22mm is predicted to provide best temperature distribution for rotor. A part of the motor is to be simulated with reasonable assumption. The analysis is carried for two cases those are with varying insulation thickness and varying heat transfer coefficients. In the present work thermal as well as structural analysis was carried out for a fan cooled D.C. motor and also to show how a commercially available software ANSYS can be used for such analysis, because the temperature distribution inside the motor is essentially a diffusion process and it is very difficult to analyze it precisely because of three dimensional effect and imponderable parameters such as the thermal contact resistance between the materials. The average temperature rise and various losses of different parts of a D.C. Motor has been provided by Integrated electrical company, Bangalore.
Thermal Science, 2018
In this article a thermal modeling is developed for a double sided linear induction motor which is used to drive a power supply system for an electric locomotive. Two cases were considered for the linear motor, with full plate armature and with sectioned plate armature. The thermal model has been obtained with Pro/Engineering software package and the mesh of the 3D thermal model has been done using tetrahedron solid elements types. Experimental validation of the model has been realized too. Errors between the simulations and the experimental data (between 1% and 4%) show that the proposed model can be used for accurate precision of the heat distribution on the linear motor.