A New Cascaded Switched-Capacitor Multilevel Inverter Based on Improved Series–Parallel Conversion With Less Number of Components The aim of this paper is to present a new structure for switched-capacitor multilevel inverters (SCMLIs) which can generate a great number of voltage levels with optimum number of components for both symmetric and asymmetric values of dc-voltage sources. The proposed topology consists of a new switched-capacitor dc/dc converter (SCC) that has boost ability and can charge capacitors as self-balancing by using the proposed binary asymmetrical algorithm and series-parallel conversion of power supply. The proposed SCC unit is used in new configuration as a submultilevel inverter (SMLI) and then, these proposed SMLIs are cascaded together and create a new cascaded multilevel inverter (MLI) topology that is able to increase the number of output voltage levels remarkably without using any full H-bridge cell and also can pass the reverse current for inductive loads. In this case, two half-bridge modules besides two additional switches are employed in each of SMLI units instead of using a full H-bridge cell that contribute to reduce the number of involved components in the current path, value of blocked voltage, the variety of isolated dc-voltage sources, and as a result, the overall cost by less number of switches in comparison with other presented topologies. The validity of the proposed SCMLI has been carried out by several simulation and experimental results. 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

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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.
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Mail : projects@lemenizinfotech.com
A New Cascaded Switched-Capacitor
Multilevel Inverter Based on Improved
Series–Parallel Conversion with Less
Number of Components
Introduction:
Multilevel inverters (MLIs) are known as one of the most
popular solutions to improve the performance of renewable energy
systems, electric vehicles (EVs), and other innovative power
electronic utilities in medium and high power applications. These
converters can generate a staircase voltage waveform at the output
with high quality and desired spectrum. The desired output voltage is
synthesized by appropriate switching of several dc-voltage links,
which leads to decrease voltage stresses on switches and total
harmonic distortion (THD).
Existing system:
The switched-capacitor part plays a role in balancing the
voltages of capacitors by alternative conduction of the clamping
switches Sc1-Sc6. When the switching devices of Group A are ON
and those of Group Bare OFF, C1 and C3, C2an d C4 are in parallel,
respectively, so VC1= VC3 and VC2= VC4. When the switching
devices of Group B are ON and those of Group A are OFF, C1 and
C4, C2 and C5 are in parallel, respectively, so VC1= VC4 and VC2=
VC5. If the switching devices of Group A are turned from ON to
OFF, and from OFF to ON over and over again, then VC1= VC2=
VC3 = VC4= VC5. That is to say, each capacitor can keep voltage

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LeMenizInfotech
36, 100 Feet Road, Natesan Nagar, Near Indira Gandhi Statue,
Pondicherry-605 005.
Call: 0413-4205444, +91 9566355386, 99625 88976.
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balance through the capacitor C4. switching states. So long as Group
A or Group B can switch once in one period, the voltages of the
capacitors can keep balance. As seen from Table-1, the switching
devices of Group B or Group A are ON for one working state and
OFF for the other working state.
Drawbacks:
 More number of required power switches.
 Large capacitor banks.
Proposed system:
A new switched-capacitor dc/dc converter (SCC) is presented
which can switch as conventional series/parallel conversion and
generate multiple dc-link voltages with optimum components. In this

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
case, voltage of all capacitors is filled by binary asymmetrical pattern
without using any auxiliary circuits. At the next, a new sub-multilevel
inverter (SMLI) topology presents, which is performed based on the
proposed SCC unit and without using the full H-bridge cell. In
addition, this structure is suitable for an inductive load with the
capability to pass the reverse current. After that, the proposed sub-
multilevel modules are cascaded with each other and create more
output voltage levels. Therefore, most of the parameters such as
number of required switches, diodes, maximum current path
components, and value of total blocked or standing voltage are
improved. In order to prove the performance of the proposed circuit,
variety number of comparisons with other recently suggested
topologies has been done in fair conditions and also analysis of
theoretical power losses is given.

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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 voltage stresses on switches.
 Low total harmonic distortion (THD).
Applications:
 Photovoltaic (PV) cells.
 Batteries.
 Fuel cells.

5. 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 2
Switched Capacitor
Multi-Level
Inverter
Load
Input DC
Supply 1
Isolation Circuit12V DC
5V DC
Buffer Circuit
Micro Controller
Circuit