Iron losses evaluation in soft magnetic materials with a sinusoidal voltage supply

Nedelcu, Steluta; Ritchie, Ewen; Leban, Krisztina; Ghiţă, Constantin; Trifu, Ion

doi:10.1109/atee.2013.6563461

Cited by 2 publications

(1 citation statement)

References 6 publications

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“…Finding the instantaneous value of the angle δ of the magnetic lag is associated with difficulties in determining the instantaneous value of losses in steel in the high saturation mode of the IG magnetic circuit. Therefore, to determine the angle δ at each integration step, let's use the following relation [29][30][31]:…”

Section: Matrix Of Instantaneous Voltage Values Between Ig Neutrals and Loadmentioning

confidence: 99%

Development of mathematical models of energy conversion processes in an induction motor supplied from an autonomous induction generator with parametric non-symmetry

Chenchevoi

Kuznetsov

et al. 2021

EEJET

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The paper presents studies of the system "induction generator-induction motor" with parametric asymmetry on a mathematical model to determine the quality of generated electricity in load operating modes. A mathematical model of the "induction generator-induction motor" system has been developed taking into account losses in steel and parametric asymmetry. The analysis of the transient characteristics of an induction generator when a motor load is connected in symmetrical and asymmetrical modes of operation is carried out. The results of changes in the main characteristics of an induction motor at various degrees of parametric asymmetry in the generator are presented. The quality of the generated electricity was analyzed based on the calculations of the unbalance coefficients for each of the operating modes. The assessment of the thermal state in steady-state conditions was carried out using an equivalent thermal equivalent circuit. Thermal transients were investigated when starting an induction motor from an autonomous energy source based on an induction generator. On a thermal mathematical model, the study of the effect of the output voltage asymmetry on the heating of the connected induction motor was carried out. It is shown that the asymmetry of the output voltage of an induction generator reaches 3–10 % and causes overheating of the windings in excess of the permissible values. A regression model has been developed for studying the operating conditions of an induction motor when powered by an induction generator with an asymmetry of the stator windings. The use of the obtained equations will make it possible to determine the most rational combination of factors affecting the heating of the stator windings of induction machines, in which they will not overheat above the maximum permissible temperature values of the corresponding insulation classes

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Section: Matrix Of Instantaneous Voltage Values Between Ig Neutrals and Loadmentioning

confidence: 99%

Development of mathematical models of energy conversion processes in an induction motor supplied from an autonomous induction generator with parametric non-symmetry

Chenchevoi

Kuznetsov

et al. 2021

EEJET

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Analytical Model and Numerical Finite Element Model for a Submersible Synchronous Hydrogenerator

Dumitru¹,

Bunea²,

Nedelcu³

et al. 2023

J. Sci. Arts

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The main objective of the paper is to demonstrate the functionality and reliability of a hydrokinetic turbine system – a submersible electric generator, suitable for very low watercourses. To achieve this goal, it is necessary to design and build a prototype of a hydrokinetic turbine, coupled with an electric generator with excitation made with permanent magnets. This paper presents an analytical model and a finite element numerical model for estimating the electrical parameters of the generator (voltage, current, power, etc.). The two models were compared, and the results were extrapolated, in the analytical model, for several speed values.

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Iron losses evaluation in soft magnetic materials with a sinusoidal voltage supply

Cited by 2 publications

References 6 publications

Development of mathematical models of energy conversion processes in an induction motor supplied from an autonomous induction generator with parametric non-symmetry

Development of mathematical models of energy conversion processes in an induction motor supplied from an autonomous induction generator with parametric non-symmetry

Analytical Model and Numerical Finite Element Model for a Submersible Synchronous Hydrogenerator

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