METHOD OF CONTROLLING AC MOTOR MOMENT BY GENERATION IN MOTOR DRIVE OF FREQUENCY-CONTROLLED SIGNAL AND METHOD TO THIS EFFECT Russian patent published in 2008 - IPC B60L15/20 H02P7/00 

FIELD: power supply.

SUBSTANCE: program of operating conditions of all cycles of a motor is compiled. The required and continuously measured generator rotor speed, generator excitation currents and motor moments are input into a comparator. The difference in values of the above characteristics is used to set up the motor operating conditions by means of an automatic motor operating conditions control unit. The difference in parameters converted into a digital code in the unit generating the motor condition signals is fed via the generator excitation current control unit, into the excitation winding of the multi-phase sinusoidal signal generator and, via the motor voltage level control unit, into the motor input. Using the frequency and output signal amplitude independent control generator the multi-phase sinusoidal signal is generated to be fed , via the phase switching circuit, to the input of the m-phase bridge transistor voltage inverter unit. The amplified sinusoidal signal comes from the power transistors outputs to the motor stator windings. The device contains the unit of manual control of operating conditions of the motor, the voltage control unit, the generator excitation current control unit, the multi-phase sinusoidal signal generator incorporating a motor, the phase switching circuitry, the generator operating phase number switching unit and the unit generating the signals of all operating conditions of the motor.

EFFECT: increased moment on the motor shaft and higher quality of a signal being generated.

2 cl, 1 dwg