METHOD FOR CONTROLLING ELECTROMAGNETIC MOMENTUM OF ASYNCHRONOUS MOTOR Russian patent published in 2007 - IPC H02P21/12 H02P27/06 

FIELD: electric engineering, possible use in electric motors for frequency control of electromagnetic momentum of asynchronous motor.

SUBSTANCE: in the method for controlling electromagnetic momentum of asynchronous motor, required stator interlinkage setting is set, necessary initial values are set and weight coefficients are selected for components of control rule, stator currents are measured in each phase, and on basis of measured values components of stator current vector are calculated in two-phased immobile coordinates system. On basis of vector components of stator current and given voltage of stator in two-phased immobile coordinates system, components of stator interlinkage and rotor interlinkage vectors are evaluated in aforementioned system of coordinates. Values of electromagnetic momentum and square stator interlinkage amplitude are calculated, compared to appropriate given values and first and second components of control rule are calculated. On basis of components of stator current vector in two-phased immobile system of coordinates, square amplitude of stator current is calculated, thus getting third component of control rule. On basis of three components of control rule, represented in proportions in accordance to corresponding weight coefficients, and of measured and evaluated values, components of vector of given stator voltage in two-phased immobile system of coordinates are calculated.

EFFECT: increased speed when controlling electromagnetic momentum, decreased losses in steel of motor and decreased ohmic losses when controlling the electromagnetic momentum.

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