METHOD OF VECTOR CONTROL OF INDUCTION MOTOR TORQUE AND DEVICE FOR ITS REALISATION Russian patent published in 2012 - IPC H02P21/00 H02P27/08 

FIELD: electricity.

SUBSTANCE: induction motor is controlled by control of an output voltage of an inverter converting DC into AC with frequency tuning at the controlled voltage by variation of a modulation depth, which is carried out by a command to vary a magnetising component of current in a stator winding of the induction motor, where voltage from the inverter is supplied, and by a command to vary a torque-shaping component, including measurement of phase currents and an angular position of a rotor shaft within a time period equal to duration of a pulse transision function of rotor current attenuation, values of rotor current vector components relative to a stator current vector are calculated using formulas given in application materials. The device comprises an active current setter, a magnetic current setter, a vector comparison unit, a field module controller, a phase angle controller and an angle summator, an inverter control circuit, an inverter, current metres, an induction motor, an angular position metre, a vectorisation unit, a metre of a module and an angle of a stator current, the first and second units of vector rotation, the vector dynamic link, a unit to subtract angles and a unit of angle conversion.

EFFECT: increased accuracy of induction motor torque control.

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