FIELD: electrical engineering.
SUBSTANCE: invention relates to electrical engineering, specifically to systems of controlled electric drive based on synchronous motors with frequency converters (FC). Method for stabilization of AC motor rotational speed consists in affecting phase angle of sinusoidal voltage generated by FC, proportional to signal of deviation of instantaneous value of load angle Θ from its average value for period of auto-oscillations, thus providing its phase shift, hence, damping of oscillations of rotation frequency of synchronous electric motors.
EFFECT: technical result consists in provision of efficient suppression of auto-oscillations of synchronous motor without rotor position sensor, simple implementation and possibility to use in different types of FC.
1 cl, 1 dwg
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