ALTERNATING CURRENT MOTOR Russian patent published in 2007 - IPC H02P21/12 H02P27/05 

FIELD: electric engineering, possible use in electric motors where deep speed management, high overload capacity, and ensured hard launch from stop mode are required.

SUBSTANCE: electric motor contains asynchronous motor with phase rotor, transformers of stator frequency and rotor frequency, indicators of phase currents of stator and rotor, transformers of number of phases of stator and rotor, tracker of resulting magnetic flow, trigonometric analyzer, direct and reverse stator current coordinate transformers, block for setting constant frequency of rotor currents, sine-cosine transformer, transformer of rotor current coordinates, set-point generator of amplitude of magnetic flow, regulator of resulting magnetic flow, block for compensating EMF of rotor, set-point generator of angular speed of rotor, regulator of angular speed of rotor, block for computing angular speed of rotor, block for setting constant frequency of rotor currents, indicator of stator current frequency, indicators of phase voltages of stator, momentum regulator, regulator of stator current component i_ys, block for compensating EMF of stator, block for setting amplitude of stator voltage, integrator, adder and multiplier. All elements of electric motor are interconnected according to the formula of the invention.

EFFECT: electric drive ensures possible hard repeated launches of asynchronous motors with phase rotor, coupled according to double power circuit, having rigid mechanical characteristics, high energy characteristics, deep and smooth management of rotor rotation speed which changes stator voltage analogically to electric drive with constant current motor.

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