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Refining induction machine characteristics at high saturation of steel

Zagirnyak Mykhaylo

Przegląd Elektrotechniczny

2020

R. 96, nr 11

119--123

The paper deals with an induction machine refined mathematical model taking into account the nonlinearity of the magnetization curve and steel losses at high saturation of the magnetic system. The steel losses increase influence on the characteristics of induction generators operating with connected high-value capacitors under the mode of high saturation of the magnetic circuit is demonstrated. The obtained calculated characteristics coincide with the results of the experimental research of a 2.2 kW induction machine with appropriate accuracy.

Przedstawiono zmodyfikowany model matematyczny silnika indukcyjnego biorący pod uwagę nieliniowość krzywej magnesowania i śtraty przy nasyceniu. Obliczone parametry porównano z danymi eksperymentalnymi dla silnika 2.2. kW.

A refined method for the calculation of steel losses at alternating current

Zagirnyak Mykhaylo, Prus Viacheslav, Rodkin Dmitro, Zachepa Yurii, Chenchevoi Volodymyr

Archives of Electrical Engineering

2019

Vol. 68, nr 2

295--308

The ways of the improvement of the method for the determination of steel losses in the electrical devices of basic types are substantiated. The method is refined by taking into account the magnetic system properties at high saturation. The presence of the interrelation between the special features of the domain structure movement and the shape of the hysteresis loop is proved for laminated cores. It enabled the explanation of the causes for the abnormally high values of the losses in the steel and the atypical shapes of the hysteresis loops at its high saturation. The empiric dependence for the determination of steel losses is obtained. It provides for the high convergence of the calculated and experimental data at the actual degree of saturation and can be used in the direct-current operation of the analyzed devices.