METHOD OF CONTROLLING AC MOTOR TORQUE BY GENERATING VARIABLE-FREQUENCY SIGNAL IN ELECTRIC DRIVE AND DEVICE TO THIS END Russian patent published in 2012 - IPC B60L15/20 H02P27/00 

FIELD: transport.

SUBSTANCE: invention relates to control over AC motor electrical and mechanical characteristics. Proposed method consists in setting two new motor operating modes. First mode includes that of motor maximum torque. Second mode consists in maximum electric power saving. Said modes are loaded into parameter comparator. Number of idle work phases is defined to generate signal of idle phase set. Signals are allowed for in generating sets of the first mode work phase at maximum motor torque and second maximum power saving mode. Proposed device comprises power saving mode work phase ACS unit, idle phase quantity estimation unit, unit to compute idle phase set, unit for separate transmission of motor maximum torque signal and that of electric power maximum saving.

EFFECT: increased motor shaft torque and generated signal quality.

2 cl, 3 dwg