Design of Nested Neutral Point Clamped (Nnpc) Inverter with Induction Motor for Capacitor Voltage-Balancing Method

Abstract

In this paper proposes a capacitor voltage-balancing method for a nested neutral point clamped (NNPC) inverter with induction motor. The NNPC inverter is a newly developed four-level voltagesource inverter for medium-voltage applications. The Induction motor is a three phase AC motor and is the most widely used machine. A capacitor voltage-balancing method for a nested neutral point clamped (NNPC) inverter is proposed in this paper. To control and balance flying capacitor voltages the proposed capacitor voltage-balancing method takes advantage of redundancy in phase switching states. In this project we are implementing the induction motor because it has the characteristic features such as Simple and rugged construction and Low cost and minimum maintenance. The proposed method needs very few computations and also easy to implement. The NNPC inverter is a newly developed four-level voltage source inverter for medium-voltage applications. The proposed method is easy to integrate with different pulse width modulation schemes. By using the simulation results we can analyze the effectiveness and feasibility of the proposed method.