Nested Four Level T-type Inverter

This book has provided a brief summary a capacitor voltage-balancing method for a four-level NESTED T-TYPE inverter is proposed in this paper. The proposed method takes advantage of redundancy in phase switching states to control and balance the FC voltages. Simple and effective logic tables are developed for the balancing control. The method is easy to implement and needs very few computations. Moreover, the method is suitable for and easy to integrate with different PWM schemes. The limitation of the NESTED T-TYPE inverter in terms of the voltage balancing and capacitor size is also investigated. The effectiveness and feasibility of the proposed method is verified by simulation and experimental results.