FIELD: electricity.
SUBSTANCE: additional effect of rotating electromagnetic stator field on sectors of short-circuit rotor winding coils passing through areas adjoining stator pole half-pitch borders is added to effect of rotating electromagnetic stator field on short-circuit rotor winding coils passing through areas adjoining stator pole pith borders. Machine retains field rotation effect and continues full-scale operation with one phase disconnected, generating high-quality harmonic voltage of missing phase in disconnected phase winding.
EFFECT: starting current ratio reduced by motor due to prevention of braking losses, increased number of starts without load loss, possible application of the machine in most difficult operation environment with high shaft load.
6 cl, 4 dwg
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