SYNCHRONOUS MOTOR CONTROL METHOD Russian patent published in 2020 - IPC H02P6/18 H02P21/10 H02P27/16 

FIELD: electrical engineering.

SUBSTANCE: invention relates to electrical engineering and can be used in systems for frequency control of speed of synchronous motors supplied from autonomous voltage inverter in mode of sensor-free control. Algorithm is realized using only load feedback signal at inverter output. To control speed of synchronous motor by means of autonomous inverter, containing channels of regulation of amplitude and frequency of voltage of stator winding: signal of amplitude adjustment is input signal ΔU; frequency adjustment channel includes a signal in form of a phase shift (by an angle ϕ) with positive sign; for control of autonomous inverter there used are signals of current sensors Dm after their transformations from three-phase (physical) model i_A, i_B, i_C into equivalent two-phase model. Operation of the device can be performed without using signals of the integration unit and the adder unit.

EFFECT: technical result is providing cost-effective (Cosϕ = 1) and stable (without oscillation) mode of engine rotation under conditions of variable moment of load on its shaft.

1 cl, 3 dwg