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 proposed project presents a review about the hardware design and implementation of single phase seven level inverter with Pulse Width Modulated (PWM) control scheme. The input to the given inverter is a DC source (Vdc) and it is capable of producing output of seven levels (3, 5, 7). The project aims in designing a modular seven level inverter circuit using MOSFETs. This project proposes a new single-phase seven-level converter based on switched PWM technique. PWM switching control scheme comes with advantages over the traditional multilevel fundamental switching scheme. One benefit of PWM methods employing much higher switching frequencies concerns harmonics. The harmonics filtering exercise is much easier and cheaper due to the fact that the undesirable harmonics occur at much higher switching frequencies. Also, the produced harmonics might be above the bandwidth of some actual system. This means that there is no power dissipation caused by the harmonics. On the contrary, multilevel fundamental switching scheme creates harmonics at lower switching frequencies and this increased the complexity of the filtering activity. In this project we are using IRF540Mosfets for designing the three h-bridge inverter circuits which can generate PWM signals to the mosfets by Arduino UNO microcontroller.

    The main objective of this project is:

1. Design of SEVEN level inverter circuit.
2. Using PWM technique for switching the mosfets.
3. Using Arduino UNO Microcontroller to achieve this task.

The major building blocks of this project are:

1. Regulated power supply.
2. Step down transformer.
3. Charging circuit.
4. Battery.
5. Arduino UNO microcontroller.
6. MOSFETS.
7. Half bridge circuits.

  Software’s used:

1. embedded C programming.
2. Arduino IDE for dumping code into Microcontroller.
3. Express SCH for Circuit design.

   

     

Regulated Power Supply:  

 

   

 

Block diagram:  

 

   

 

video: [/iframe