FIELD: electricity.
SUBSTANCE: necessary reference values are set, weight coefficient of control law is chosen in control method of electromagnetic moment of asynchronous motor. Currents of stator are measured in each phase and vector components of stator current are calculated in double-phase fixed coordinate system. Amplitude, angular position and components in double-phase fixed coordinate system of stator voltage vector are calculated as per angular speed value of stator voltage vector. As per calculated components of vectors of current and voltage of stator there evaluated are vector components of flux linkage of rotor in fixed and codirectional (with stator voltage vector) coordinate systems. Electromagnetic moment is calculated and compared to the specified value. Control law is obtained as per comparison results and estimated values considering weight coefficient. Value of the specified angular speed of stator voltage vector is calculated and implemented with frequency converter.
EFFECT: increasing quick operation and accurate control of electromagnetic moment of asynchronous motor, simplifying and improving reliability of electric drive.
1 dwg
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