A new interleaved three phase single-stage pfc ac–dc converter with flying capacitor Do Your Projects With Technology Experts... To Get this projects Call : 9566355386 / 99625 88976 Visit : www.lemenizinfotech.com / www.ieeemaster.com Mail : projects@lemenizinfotech.com

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A New Interleaved Three-Phase Single-Stage
PFC AC–DC Converter with Flying
Capacitor
Abstract
Introduction:
PFC techniques can generally be classified as: 1) Passive
methods that use inductors and capacitors to filter out low-
frequency input current harmonics to make the input current
more sinusoidal. Although these converters implemented with
such PFC are simple and inexpensive, they are also heavy and
bulky, and thus, passive methods are used in a limited number of
applications. 2) Two-stage converters that use a pre-regulator to
make the input current sinusoidal and to control the intermediate
dc bus voltage along with a dc–dc converter to produce the
desired output voltage. Such converters, however, require two
separate switch-mode converters so that the cost, size, and
complexity of the overall ac–dc converter are increased. 3)
Single-stage power-factor-corrected (SSPFC) converters that
have PFC and isolated dc–dc conversion in a single power
converter so that they are simpler and cheaper than two-stage
converters. Several single-phase and three-phase converters
have been proposed in the literature, with three-phase converters

2. Do Your Projects With Domain Experts…
Copyright © 2015 LeMeniz Infotech. All rights reserved
LeMeniz Infotech
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
being preferred over single-phase converters for higher power
applications.
Existing system:
Traditional passive diode rectifier/LC filter input
combination; the resulting converter would be very bulky and
heavy due to the size of the low-frequency inductors and
capacitors. The most common approach to PFC is to use two-
stage power conversion schemes. These two-stage schemes use
a front-end ac–dc converter stage to perform ac–dc conversion
with PFC with the output of the front-end converter fed to a
back-end dc–dc converter stage that produces the desired
isolated dc output voltage. Using two converter stages in this
manner, however, increases the cost, size, and complexity of the
overall ac–dc converter, and this has led to the emergence of
single-stage power-factor-corrected converters. In order to
reduce the cost, size, and complexity associated with two-stage
ac–dc power conversion and PFC, researchers have tried to
propose single-stage converters that integrate the functions of
PFC and isolated dc–dc conversion in a single power converter.
Proposed system:
The proposed converter can operate with reduced input
current ripple and peak switch currents due to its interleaved
structure, a continuous output inductor current due to its three-

3. Do Your Projects With Domain Experts…
Copyright © 2015 LeMeniz Infotech. All rights reserved
LeMeniz Infotech
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
level structure, and improved light-load efficiency as some of its
switches can be turned ON softly. In the paper, the operation of
the converter is explained, the steady-state characteristics of the
new converter are determined.
Advantages:
 Better efficiency, especially under light-load conditions.
Applications:
 LED lighting applications
 DC drives

4. Do Your Projects With Domain Experts…
Copyright © 2015 LeMeniz Infotech. All rights reserved
LeMeniz Infotech
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:
BUFFER
circuit
5VDC
PIC controller
circuit
OPTO coupler
circuit
12 V
DC
Rectifier
Single
phase AC
supply
Diode
bridge
rectifier 1
Diode
bridge
rectifier 2
High
frequency
transformer
3 level flying
capacitor
inverter
High
frequency
transformer
Load
Fitter

5. Do Your Projects With Domain Experts…
Copyright © 2015 LeMeniz Infotech. All rights reserved
LeMeniz Infotech
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
Tools and software used:
 MPLAB – microcontroller programming.
 ORCAD – circuit layout.
 MATLAB/Simulink – Simulation.