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National Repository of Grey Literature 2 records found  Search took 0.01 seconds. 
Influence of Induction Machine Operation Mode Type Onto The Equivalent Circuit
 Skalka, Miroslav ; Schreier, Luděk ; Janda, M. ; Ondrůšek, Č.
This paper deals with analysis of Induction Machine equivalent circuit parameters for both operation mode types (motor/generator). The purpose of this work is the definition of equivalent circuit parameters and theirs non-linear behavior depending on various factors - slip, mechanical torque, temperature. The temperature influence for longitudinal resistances is done - which means, the stator and rotor resistance value depends on passing current. At the end an electromagnetic field comparison for the same operation point in both operation mode types will be presented. The whole analysis is done in ANSYS (by FEM) and MATLAB program.
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Třetí prostorová harmonická v pětifázovém asynchronním stroji
 Schreier, Luděk ; Bendl, Jiří ; Chomát, Miroslav ; Skalka, Miroslav
The paper deals with analysis of situation in a five-phase induction machine. The method of space vectors is used for this purpose. The necessity to consider higher space harmonic waves of a current layer, magnetic induction and yoke flux is shownin case of feeding by unbalanced stator voltages. The attention is paid especially to the third space harmonics that may negativelly influence properties of the five-phase machine in this case.
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