DEVICE FOR CONTROL OF ALTERNATING CURRENT MOTOR Russian patent published in 2012 - IPC H02P21/00 H02P21/12 H02P27/04 H02P27/06 H02P27/08 

FIELD: electricity.

SUBSTANCE: device for control of alternating current motor consists of three-phase invertor (2) which is connected to DC source (1) and outputs three-phase alternating currents to AC motor (6); current detector (3, 4, 5), which detects current of AC motor (6); command module (50) for control of voltage/PWM signals, which calculates command to control invertor (2) output voltage on the basis of current detector (3, 4, 5) signal and generates pulse-width modulated signal to control switching element in invertor (2) based on command of output voltage control; module (100A) for compensation of motor current unbalance, which generated compensation values for motor current unbalance for respective phases on the basis of current of at least any two phase of AC motor (6) current and sets compensation value for motor current unbalance for remaining phase equal to zero, and pulse-width modulated signal of two phases is directly or indirectly adjusted in command module (50) for control of voltage/PWM signals on the basis of compensation values for motor current unbalance in compliance with invertor (2) excitation mode.

EFFECT: car driving.

13 cl, 8 dwg