Resonance analysis and soft switching design of isolated boost converter with coupled inductors for vehicle inverter application To Get this projects Call : 9566355386 / 99625 88976 Visit : www.lemenizinfotech.com / www.ieeemaster.com Mail : projects@lemenizinfotech.com

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Copyright © 2015 LeMeniz Infotech. All rights reserved
LeMeniz Infotech
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Pondicherry-605 005.
Call: 0413-4205444, +91 9566355386, 99625 88976.
Web : www.lemenizinfotech.com / www.ieeemaster.com
Mail : projects@lemenizinfotech.com
Resonance Analysis and Soft-Switching
Design of Isolated Boost Converter with
Coupled Inductors for Vehicle Inverter
Application
Abstract
Introduction:
Vehicle inverter is now spreading across the world. Top
end Audi and Bavarian Motor Works cars are enjoying comfort
and convenience of vehicle inverters. Most traditional vehicle
inverters are composed by two stages: dc/dc converter and dc/ac
inverter. To achieve 220 V root-mean-square sine wave, the
input voltage of dc/ac inverter should be at least 360 Vdc in a
highly efficient manner. It is worth noticing that the vehicle
battery presents low-voltage characteristic (10.8 to 16 V, typical
12 V), the dc/ac inverter must have a high-voltage conversion
ratio dc/dc converter on the front end. Considering life span of
vehicle battery, mounting space and natural cooling, dc/dc
converter with low-input current ripple, high operation
frequency, and high efficiency are required in this application.

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
Besides, galvanic isolation is necessary to meet the safety
standards.
Existing method:
The push-pull is a double ended topology i.e. two
transistors share the switching function. The transformers flux
swing is fully utilized in this topology by symmetrical operation
of its core.
Proposed method:
The comprehensive resonance analysis and soft-switching
design of the isolated boost converter with coupled inductors are
investigated in this project. Due to the resonance participated by
the voltage doubler capacitor, clamping capacitor, and leakage
inductance of coupled inductors, the reverse recovery problem
of the secondary diodes is restrained within the whole operation
range. By choosing appropriate magnetic inductance of the
coupled inductors, zero-voltage switching ON of the main
MOSFETs is obtained collectively at the same working
conditions without any additional devices. The volume of the
converter can also be decreased because of smaller transformers
and smaller capacitors.

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
Advantages:
 An optimized resonance between the two kinds of
resonances is used to increase power density and lower
converter cost.

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
 Moreover, by choosing appropriate magnetic inductance of
the coupled inductors, ZVS on of the main MOSFETs and
ZCS off of the secondary diodes can be achieved
collectively at the same working conditions without any
additional devices.
 The reverse recovery problem of the secondary diodes is
restrained within the whole operation range.
 The range of duty ratio is enlarged to achieve soft
switching and an optimal operation point is obtained with
minimal input current ripple, when duty ratio approaches
0.5.
Applications:
 Vehicle inverter applications.

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
Block diagram:
INPUT DC
SUPPLY
SWITCHING
CIRCUIT
COUPLED
INDUCTORS
PIC CONTROLLER
FILTER
VOLTAGE
DOUBLER
CAPACITOR
LOAD
BUFFER
OPTO ISOLATOR12V DC
5V DC

6. 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.