Torque Ripple Suppression Method of Nine-region Permanent Magnet Switched Reluctance Motor
A nine-region model predictive control method was proposed for switched reluctance motors using conventional direct torque control which was prone to large torque ripple.First,a new exponential flux linkage model containing a permanent magnet-assisted switched reluctance motor was established to predict the flux link-age and torque values at the next moment.Second,a rotor cycle was divided into nine sectors based on the in-ductance characteristics,and the candidate voltage states corresponding to each sector were redistributed,which reduced the system's computation in each sampling cycle.An optimal control sequence was obtained online by the designed objective function.Finally,the proposed method was validated by simulation,the results showed that compared with the conventional DTC method,the torque ripple were reduced by 4.8%,43.4%and 61.4%and 9%,32.53%and 47.4%on the speeds of 500,1 000 and 1 200 r/min,with loads of 5 N·m and 10 N·m respectively.
万方数据
维普
