Design and Implementation of a Novel Multilevel DC–AC Inverter In this paper, a novel multilevel dc-ac inverter is proposed. The proposed multilevel inverter generates seven-level ac output voltage with the appropriate gate signals' design. Also, the low-pass filter is used to reduce the total harmonic distortion of the sinusoidal output voltage. The switching losses and the voltage stress of power devices can be reduced in the proposed multilevel inverter. The operating principles of the proposed inverter and the voltage balancing method of input capacitors are discussed. Finally, a laboratory prototype multilevel inverter with 400-V input voltage and output 220 Vrms/2 is implemented. The multilevel inverter is controlled with sinusoidal pulse-width modulation (SPWM) by TMS320LF2407 digital signal processor (DSP). Experimental results show that the maximum efficiency is 96.9% and the full load efficiency is 94.6%. Web : http://www.lemenizinfotech.com web : http://www.lemenizinfotech.com/tag/ieee-projects-in-pondicherry/ Web : http://ieeemaster.com Web : http://ieeemaster.com/power-electronics-ieee-projects-2016-2017/ Web : http://ieeemaster.com/power-system-ieee-projects-2016-2017/ Address: 36, 100 Feet Road(Near Indira Gandhi Statue), Natesan Nagar, Pondicherry-605 005 Contact numbers: +91 95663 55386, 99625 88976 (0413) 420 5444 Mail : projects@lemenizinfotech.com Mobile : 9566355386 / 9962588976

1. The Master of IEEE Projects
Copyright © 2016LeMenizInfotech. All rights reserved
LeMenizInfotech
36, 100 Feet Road, Natesan Nagar, Near Indira Gandhi Statue,
Pondicherry-605 005.
Call: 0413-4205444, +91 9566355386, 99625 88976.
Web :www.lemenizinfotech.com/ www.ieeemaster.com
Mail : projects@lemenizinfotech.com
Design and Implementation of a Novel
Multilevel DC–AC Inverter
Introduction:
As a result of high-technology development, the demand and the
quality of electric power are higher than before. Because of the
advancement of semiconductor, the specification of power device and
power conversion technique is promoted. One of the power converters
which can transform dc–ac is called inverter. Inverter is the inter
medium which transmits power to other electrical equipment such as
uninterruptible power supply, servo motor, air-conditioning system,
and smart grid composed of renewable energy. To satisfy different
demands and characteristic of loads, the output frequency and voltage
have to change with different loads.
Existing system:
It comprises a single-phase conventional H-bridge inverter, two
bidirectional switches, and a capacitor voltage divider formed by C1,
C2, and C3. The modified H-bridge topology is significantly
advantageous over other topologies, i.e., less power switch, power
diodes, and less capacitor for inverters of the same number of levels.
Photovoltaic (PV) arrays were connected to the inverter via a dc–dc
boost converter. The power generated by the inverter is to be
delivered to the power network, so the utility grid, rather than a load,
was used. The dc–dc boost converter was required.

2. The Master of IEEE Projects
Copyright © 2016LeMenizInfotech. All rights reserved
LeMenizInfotech
36, 100 Feet Road, Natesan Nagar, Near Indira Gandhi Statue,
Pondicherry-605 005.
Call: 0413-4205444, +91 9566355386, 99625 88976.
Web :www.lemenizinfotech.com/ www.ieeemaster.com
Mail : projects@lemenizinfotech.com
Drawbacks:
 Voltage stress of the power device also increases.
 AMOSFET is the appropriate component to operate at high
frequency, but power rating is not as good as IGBT.
Proposed system:
In the proposed novel topology, an input voltage divider is
composed of three series capacitors C1, C2, and C3. The divided
voltage is transmitted to H-bridge by four MOSFETs, and four
diodes. The voltage is send to output terminal by H-bridge which is
formed by four MOSFETs. The proposed multilevel inverter
generates seven-level ac output voltage with the appropriate gate
signals design.

3. The Master of IEEE Projects
Copyright © 2016LeMenizInfotech. All rights reserved
LeMenizInfotech
36, 100 Feet Road, Natesan Nagar, Near Indira Gandhi Statue,
Pondicherry-605 005.
Call: 0413-4205444, +91 9566355386, 99625 88976.
Web :www.lemenizinfotech.com/ www.ieeemaster.com
Mail : projects@lemenizinfotech.com
Advantages:
 Low dv/dt,
 Low input current distortion.
 Lower switching frequency.
Applications:
 Un interruptible power supply,
 Servo motor,
 Air-conditioning system, and
 Smart grid composed of renewable energy

4. The Master of IEEE Projects
Copyright © 2016LeMenizInfotech. All rights reserved
LeMenizInfotech
36, 100 Feet Road, Natesan Nagar, Near Indira Gandhi Statue,
Pondicherry-605 005.
Call: 0413-4205444, +91 9566355386, 99625 88976.
Web :www.lemenizinfotech.com/ www.ieeemaster.com
Mail : projects@lemenizinfotech.com
Block diagram:
Input DC
Supply
Load
Seven Level Inverter
Isolation Circuit 12V DC
5V DC
Buffer Circuit
Micro Controller
Circuit