Finite Element Analysis of Induction Machines

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Supervisor:
Dr. Balázs Gergely György
Department of Electric Power Engineering

Computer-aided design and simulation of electric machines helps engineers to define analitically hard or loosely measurable parameters and to create constructions with better technical parameters. It is very important to exploration the mechanical and electrical stresses in electric machines. The Finite Element Analysis gives us the opportunity to examine the proper characteristics of a machine depending on parameters

In the past years the requirements of partners and the international standards made energy saving and high efficiency high priority at production of electric machines. Some of characteristics are really hard to determine accurately eg. the additional losses induced by the airgap harmonics. The calculations are normally based on practical results with approximate factors. Therefor in case of some machine constructions the calculated and real results show a significant difference. With Finite Element Analysis the calculation of losses can also be more accurate.

My thesis shows the finite elment analysis of a squirrel cage induction motor designed by Hyundai Technologies Center Hungary Ltd. I shortly describe the operation principle of this type of machine’s, the construction and also review the process of designing. During my work I have also created an additional program to the 2D Finite Element software used by the company that automatize the modeling of squirrel cage induction machines. I introduce the used considerations through the modeling of a 2,65 MW squirrel cage induction motor step by step. The main goal of my thesis is to determine and compare the additional losses with various geometric and electric constructions. The reported results might help to design machines with higher efficiency and better parameters.

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