METHOD FOR CONTROLLING AC CONVERTER-FED MOTOR AND A SERVO SYSTEM FOR ITS IMPLEMENTATION Russian patent published in 2018 - IPC H02P6/32 H02P6/16 G05B13/02 

FIELD: electrical equipment.

SUBSTANCE: invention can be used in controlled electric motors, in particular for generating control signals in a system with a two-phase permanent magnet synchronous motor. Method consists in that, when converting the synchronous motor shaft rotation angle into the three-phase electrical signal of the synchronous motor rotor position sensor, which amplitude is proportional to the control signal, and the synchronous motor two-phase supply voltage formation from it, which average value varies according to the sinusoidal law, synchronous motor two-phase supply voltage is formed from the sign of the difference between the synchronous motor two-phase rotor position sensor signal and the synchronous motor two-phase current sensor signal. Follow-up system comprises a series-connected modulator, a synchronous motor two-phase rotor position sensor and a two-phase demodulator, two-phase converter, two-phase synchronous motor, which rotor is mechanically connected to the shaft of the synchronous motor rotor two-phase position sensor. Follow-up system is additionally equipped with a two-phase relay, synchronous motor current two-phase sensor and a two-phase adder, which summing input is connected to the two-phase demodulator output, and a subtracting input is to the output of the synchronous motor rotor two-phase position sensor, two-phase adder output is connected to the two-phase relay input, two-phase relay output is connected to the input of a two-phase convertor, which output is connected to the synchronous motor two-phase current sensor current input, and the synchronous motor two-phase current sensor current output is connected to a synchronous motor.

EFFECT: technical result is obtaining of the permanent magnet synchronous motor phase currents (torque) controller optimum accuracy and speed and the permanent magnet synchronous motor characteristics, identical to the DC rotational motor characteristics.

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