International Journal of Image, Graphics and Signal Processing (IJIGSP)
IJIGSP Vol. 13, No. 3, 8 Jun. 2021
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The Influence of Magnetic Hysteresis in Magnetic Circuit Sheets on Transient Processes in Electrical Machines
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Author(s)
Nenad A. Markovic
1,*
Slobodan N. Bjelic
2
Filip N. Markovic
2
Index Terms
Electrical Machines, Magnetic Circuit, Sheets, Transient Process, MATLAB Simulink
Abstract
The character of transient processes in electrical machines and transformers defines the shape of magnetization curve of the magnetic circuit, i.e. of its sheets. Approximate analytical or numerical methods are used to determine the influence of saturation and hysteresis on transient processes. This paper presents an analytical method for the calculation of transient process in a magnetic circuit with assumed magnetization characteristic, one part of which contains saturation. An operator calculus was used to solve Maxwell's equations that characterize the transient process. The applied method has been verified by the simulation results using the adapted part of psbxfosaturable.mdl of the MATLAB Simulink software package. It is also shown that due to saturation and influence of hysteresis, additional free components appear in the sheets of the magnetic circuit (recognized in obtained values of current, induction and flux). Analysis of the shape of time diagrams of quantities also shows that the time constants of these quantities increase. In the linear part of the magnetization curve, solutions with higher accuracy are obtained, and in the part of saturation in which the accuracy of the method was not in foreground, only a qualitative analysis of the transient process has been achieved. In comparison with other methods, two regimes of transient processes when given are analyzed: magnetic excitation forces and field strengths, and magnetic fluxes and inductions.
Cite This Paper
Nenad A. Marković, Slobodan N. Bjelić, Filip N. Marković, " The Influence of Magnetic Hysteresis in Magnetic Circuit Sheets on Transient Processes in Electrical Machines", International Journal of Image, Graphics and Signal Processing(IJIGSP), Vol.13, No.3, pp. 1-12, 2021. DOI: 10.5815/ijigsp.2021.03.01
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