Now a day’s many industrial applications have begun to require high power. Some appliances in the industries however require medium or low power for their operation. Using a high-power source for all industrial loads may prove beneficial to some motors requiring high power, while it may damage the other loads. Some medium voltage motor drives and utility applications require medium voltage. The multi level inverter has been introduced since 1975 as alternative in high power and medium voltage situations. The Multi level inverter is like an inverter and it is used for industrial applications as alternative in high power and medium voltage situations. The 5- level diode clamped multilevel inverter uses switches, diodes; a single capacitor is used, so output voltage is half of the input DC. The project aims in designing a modular five level inverter circuit using MOSFETs. This project proposes a new single-phase five-level converter based on switched capacitor technique. The capacitor charging in the proposed converter is carried out in a self-balancing form which does not need closed-loop modulations or additional balancing circuits. The proposed topology is a voltage booster without using end side H-bridge for changing load voltage polarity. So, switching losses and total voltage stress of semiconductor components reduce in the proposed converter. The performing modes of the proposed topology, its modulation scheme, capacitors’ balancing analysis, capacitance and loss calculations, and also the development of the proposed converter for enhancing the quality of output voltage waveform are discussed in depth. Moreover, the comparison of the proposed structure with the other multi-level topologies shows that the proposed converter can reduce the number of semiconductor elements and the required isolated DC sources.        

The main objective of this project is:  

1. Design of Five level inverter circuit.

         

The major building blocks of this project are:  

1. Regulated power supply.
2. PIC microcontroller
3. Reset Button.
4. Crystal oscillator.
5. LED indicators.
6. MOSFETS
7. Capacitor voltage drive
8. Half bridge circuit
9. Step-Up Transformer
10. AC Bulb.

         

Software’s used:  

1. PIC-C compiler for Embedded C programming.
2. PIC kit 2 programmer for dumping code into Micro controller.
3. Express SCH for Circuit design.

     

Regulated Power Supply:

                   

Block Diagram:            

video: