METHOD OF THREE-LEVEL SUPPRESSING TORQUE PULSATIONS OF FOUR-PHASE VALVE JET ENGINE Russian patent published in 2017 - IPC H02P25/08 H02P25/98 H02P6/10 

FIELD: electricity.

SUBSTANCE: in the method of three-level suppressing the torque pulsations of a four-phase valve reactive motor, the first set of the torque thresholds is set in the interval [0°, θ_r/ 4] of the rotor positions. The second set of the torque thresholds is set in the interval [θ_r/4, θ_r/ 2] of the rotor positions. Power is applied to adjacent phases 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/4. 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 the torque thresholds, while phase B uses the first set of the torque thresholds. Critical position θ₁ automatically occurs during the switching process, thereby eliminating the need for additional computations. The total torque is controlled in the interval [T_e+ th2_low,T_e+th2_up]. In the interval [θ₁, θ_r/ 4], phase A continues to use the second set of the torque thresholds, and phase B continues to use the first set of the torque thresholds, and the total torque is controlled in the interval [T_e+ th1_low, T_e+th1_up]. This suppresses the torque pulsations of the four-phase valve jet engine and provides high value for technical applications.

EFFECT: extending the range of providing a smooth torque.

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