در مبدلهاي سه سطحي SVM به كمك مدولاتورهاي SPWM چگونگي توليد دنباله هاي سوييچينگ مدولاتورهاي اصلاح شده

SVM Switching Pattern Generators by Means of Modified SPWM Modulators in Three-Level Converters

Multilevel inverters have currently found applications in adjustable speed ac drives, traction systems and power system compensators. Several modulation techniques have been proposed for switching multilevel inverters. Switching techniques are evaluated basically by factors such as dc- link voltage utilization, out_ at spectrum and dynamic performance. Among different PWM techniques, SPWM and SVM because of their very good switching performances and features have been widely used in analog and digital power converter control strategies, respectively. It was shown that there is an inherent relation between these two PWM schemes for two-level inverters. This paper extracts the relation between switching patterns generated by SVM and SPWM modulators for related three-level inverters. The validity of the analytical results are verified by simulation.