A simple potential balancing strategy for neutral-point-clamped inverter fed direct torque control induction machines

摘要: This paper presents a simple and robust potential balancing strategy for Direct Torque Control (DTC) of induction machines. In the proposed method, two-level hysteresis comparator is used to restrict error voltage, i.e. difference upper lower capacitors within band. The will produce suitable digitized output status be indexed into look-up table selecting appropriate switching states compensate mismatch voltages. doing so, variation two voltages can controlled, consistently, as compared that using common SVM approaches where (or ripple) not strictly maintained. Some experimental results are presented highlight improvements DTC performances well robustness control steady state dynamic conditions.