Abstract: A three-phase switched reluctance motor torque ripple three-level suppression method. A first set of torque thresholds (th1low, th1zero, th1up) is set in rotor position interval [0°, ?r/3]. A second set of torque thresholds (th2low, th2zero, th2up) is set in rotor position interval [?r/3, ?r/2]. Power is supplied to adjacent phase A and phase B for excitation. The power supplied for excitation to phase A leads the power supplied for excitation to phase B by ?r/3. At this moment, phase A is turned off, phase B is turned on and three-level suppression of torque ripple of three-phase switched reluctance motor is realized by dividing the commutation process from phase A to phase B into two sections.

Abstract: A three-phase switched reluctance motor torque ripple two-level suppression method. A first set of torque thresholds at rotor position interval [0°, ?r/3]. A second set of torque thresholds at rotor position interval [?r/3, ?r/2]. Power is supplied for excitation. The power supplied for excitation to phase A leads the power supplied for excitation to phase B by ?r/3. Phase A is turned off, while phase B is turned on. An entire commutation process from phase A to phase B is divided. In rotor position interval [0°, ?1], phase A uses the second set of torque thresholds while phase B uses the first set. Critical position ?1 automatically appears in the commutation process. Total torque is controlled. In rotor position interval [?1, ?r/3], phase A uses the second set of torque thresholds, phase B uses the first set, and the total torque is controlled, suppressing torque ripples of a three-phase switched reluctance motor.

Abstract: A three-phase switched reluctance motor torque ripple three-level suppression method. A first set of torque thresholds (th1low, th1zero, and th1up) is set in rotor position interval [0°, ?r/3]. A second set of torque thresholds (th2low, th2zero, and th2up) is set in rotor position interval [?r/3, ?r/2]. Power is supplied to adjacent phase A and phase B for excitation. The power supplied for excitation to phase A leads the power supplied for excitation to phase B by ?r/3. An entire commutation process from phase A to phase B is divided into two intervals. In rotor position interval [0°, ?1], a phase A uses the second set of torque thresholds (th2low, th2zero, and th2up) while phase B uses the first set of torque thresholds (th1low, th1zero, th1up). Critical position ?1 automatically appears in the commutation process, thus obviating the need for additional calculations. Total torque is controlled between [Te+th2low and Te+th2up].

Abstract: A three-phase switched reluctance motor torque ripple two-level suppression method is disclosed. A first set of torque thresholds is set in rotor position interval [0°, ?r/3]. A second set of torque thresholds is set in rotor position interval [?r/3, ?r/2]. Power is supplied to adjacent phase A and phase B for excitation. The power supplied for excitation to phase A leads the power supplied for excitation to phase B by ?r/3. Phase A is turned off while phase B is turned on. An entire commutation process from phase A to phase B is divided into two intervals. In rotor position interval [0°, ?1], phase A uses the second set of torque thresholds while phase B uses the first set of torque thresholds. Critical position ?1 automatically appears in the commutation process, thus obviating the need for additional calculations. Total torque is controlled between [Te+th2low and Te+th2up].