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A step up switched capacitor multilevel inverter with self voltage balancing
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A step-up switched-capacitor multilevel inverter with self voltage balancing

Category : Power Electronics


Sub Category : DC TO AC CONVERTERS (INVERTERS)


Project Code : ITPW26


Project Abstract

The objective of this paper is to propose a new inverter topology for multilevel voltage output. This topology is designed based on switched-capacitor technique and the number of output levels is determined by the number of switched-capacitor cells. Only one dc voltage source is needed and the problem of capacitor voltage balancing is avoided as well. This structure is not only very simple and easy to be extended to higher level, its gate driver circuits are also simplified because the number of active switches is reduced. Operational principle of this inverter and the targeted modulation strategies are presented, and power losses are investigated as well.  The hardware will be implemented on PIC16F877A with 7-level.

EXISTING SYSTEM

 

PROPOSED SYSTEM

                                   

Conventionally, multilevel inverter topologies can be divided into three categories: neutral-point-clamped; flying capacitor; and the H-bridge cascade. However, their drawbacks are also apparent.

 

In recent years, numerous new multilevel inverter topologies which cannot be attributed to the traditional three classifications aforementioned have been reported.

 

existing technique:

MPWM, SPWM

proposed technique:

Switched capacitor with  SPWM

 

For several attractive features such as near sinusoidal staircase output voltage waveforms, reduced dv/dt stresses and operating with lower switching frequency stress etc.,

 

The use of a large number of active switches increases the cost and component counts

 

less efficiency , Distortion will lead more EMI

 

High efficiency,

Lesser number of Switches

Low Harmonic distortion

Very simple topology

 

 
 
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