Cascaded Multilevel Inverter Analysis

Chapter:-1 Introduction

This cascaded multilevel inverter has use can be as H-bridge inverters, which can connected in series to provide a sinusoidal output voltage.
The H-bridge and the output voltage generated by multilevel inverter is the sum of all the voltages generated by each cell.
In single phase inverter, each phase is connected to single dc source.
The multilevel inverter will be in ON stage and when two switches with the opposite positions and direction will remain ON condition. It will turn OFF when all the inverters switch ON or OFF stages.
To minimize the total harmonic distortion, switching angles are defined and implemented.
Cascaded Multilevel inverter are found in many applications industrial motor drives, utility
operate through lower switching of frequency.
2. Can draw input current with having very low harmonic distortion present in it.
3. smaller common mode voltage produces, and also reducing the stress in the motor bearings.

Cascaded multilevel inverter disadvantages.
1. In this it can have unbalanced voltage.
2. switches required are more.
3. A More complex controller is required due to the use of large amount of capacitors, which need to be balanced.
Several Multilevel have developed in the last few years. They are more complex to modulate because of the number of switching alternatives that are available.
• Clampping og diodes , Capacitor and Multilevel inverter

Chapter:-2 MULTILEVEL CONVERTER TOPOLOGIES
In the cascaded multilevel inverter of the work there are briefly description of the mostly developed. there will be mentioned their advantages and disadvantages while discussing and their operation principles.

A. Objective of the study

The following objectives are devised for this study and are summarized below.
1) To find new methods of reducing Harmonics.
2) To improve the power quality.
3) To improve the
Many of the goals of prototyping are shared across all four of the above categories.

We prototype to:
• Learn. If a picture is worth a thousand words, a prototype is worth a thousand pictures.
• Solve disagreements. Prototyping is a powerful tool that can eliminate ambiguity, assist in ideation, and reduce miscommunication.
• Start a conversation. A prototype can be a great way to have a different kind of conversation with users.
• Fail quickly and cheaply. Creating quick and dirty prototypes allows you to test a number of ideas without investing a lot of time and money up front.
• Manage the solution-building process. Identifying a variable to explore encourages you to break a large problem down into smaller, testable chunks.

Chapter:-8 CONCLUSION

• After making all this canvas we are satisfied to complete our canvas making.

• From the design engineering subject we come nearer to each other because without discussion it is not possible to make.

• By forming this canvas we come to know new persons, friends who motivate us to make this possible.

• We found out the required components.

REFERENCE

1. Power electronic book by P.S bhimra
2. Research publication