Hybrid intelligent adjusting method of torque hysteresis width in DTC (Direct Torque Control) system
A technology of hysteresis width and intelligent adjustment, applied in control systems, vector control systems, control generators, etc., can solve problems such as speed pulsation, periodic speed pulsation, system steady-state error, etc.
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[0043] Aiming at the problems in the background technology, the inventor found through painstaking research and analysis that the hysteresis width of the flux linkage and torque in the direct torque control of the induction motor deeply affects the flux linkage and torque ripple, and the ripple value is limited to Within the bandwidth of the hysteresis comparator: the larger the hysteresis value, the larger the ripple. Starting from this idea, if the pulsation is to be reduced, the bandwidth of the hysteresis comparator must be reduced, but this will increase the switching frequency and switching loss of the inverter, reduce the operating efficiency, and improve the efficiency of the electronic switch. technical requirements; in addition, the smaller fixed hysteresis width cannot completely eliminate the flux linkage and torque ripple (especially in the low speed region, the effect of reducing the ripple is negligible), and the smaller fixed hysteresis width will reduce the per...
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