| 摘要 |
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°, θr/3]. A second set of torque thresholds (th2low, th2zero, and th2up) is set in rotor position interval [θr/3, θr/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 θr/3. An entire commutation process from phase A to phase B is divided into two intervals. In rotor position interval [0°, θ1], 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 θ1 automatically appears in the commutation process, thus obviating the need for additional calculations. Total torque is controlled between [Te + th2low and Te + th2up]. In rotor position interval [θ1, θr/3], phase A continues to use the second set of torque thresholds (th2low, th2zero, and th2up), phase B continues to use the first set of torque thresholds (th1low, th1zero, and th1up), and the total torque is controlled between [Te + th1low and Te + th1up]. This suppresses torque ripples of a three-phase switched reluctance motor and provides great engineering application values. |
