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National Repository of Grey Literature 2 records found  Search took 0.00 seconds. 
Nulová složka v třífázových asynchronních motorech
 Schreier, Luděk ; Chomát, Miroslav
The paper deals with such a case of influence of zero-sequence component on the induction machine when this component arises due to connection of the stator winding neutral with the feeding source. The relationship between the zero-sequence component and the third space harmonic of stator current layer is shower. Furthermore, the paper deals with the methods of suppressing the undesirable influence of the zero-sequence component on the induction motor, especially an increase of additional losses and a rise of parasitic torques.
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Vliv nulové složky statorových proudů na magnetické pole a přídavné ztráty asynchronního motoru v nouzovém chodu
 Schreier, Luděk ; Bendl, Jiří ; Chomát, Miroslav
Two-phase feeding of induction motors under emergency operation from a voltage-type converter controlled so that currents of connected stator phases can have the required amplitude and phase shift is analysed. Based on the analysis the amplitudes and the phase shift of the fundamental time harmonic of the converter output currents are determined so that at required torque the machine can operate with minimum stray losses.
Detailed record

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