METHOD FOR TWO-LEVEL SUPPRESSION OF TORQUE MOMENT PULSATIONS OF THREE-PHASE AC ELECTRONIC REACTOR MOTOR Russian patent published in 2017 - IPC H02P25/08 H02P25/98 H02P6/10 

FIELD: electricity.

SUBSTANCE: in the method for two-level suppression of torque moment pulsations of three-phase ac electronic reactor motor, the first set of torque thresholds is set in the interval [0°, θ_r/3] positions of rotor; the second set of torque thresholds is set in the interval [θ_r/3, θ_r/2] positions of rotor; power is supplied to adjacent phase A and phase B for excitation. The power signal, supplied for excitation to phase A, is ahead of the power signal, supplied for excitation to phase B, by θ_r/3. Phase A is off, while phase B is on. The entire switching process from phase A to phase B is divided into two intervals. In the interval [0°, θ₁], phase A uses the second set of torque thresholds, while phase B uses the first set of torque thresholds. Critical position θ₁ automatically occurs during the switching process, thereby eliminating the need for additional computations. The total torque moment is controlled in the interval [T_e+th2_low, T_e+th2_up]. In the interval [θ₁, θ_r/3], the phase A continues to use the second set of torque thresholds, phase B continues to use the first set of torque thresholds, and the total torque is controlled in the interval [_Te+th1_low, T_e+th1_up]. This suppresses the torque pulsations of the three-phase ac reaction electric motor.

EFFECT: ensuring a smooth control of the output torque at maximum range without regard to the impact of the main power switch phase off angle on torque control efficiency.

2 cl, 4 dwg