OPTIMAL DESIGN OF AN INTERLEAVED DC-DC SWITCH MODE CONVERTER · Interleaved Boost Converters are specialized boost converter topologies. The converter components are paralleled into

OPTIMAL DESIGN OF AN INTERLEAVED DC-DC SWITCH

MODE CONVERTER

Presented ByPrasanna Kumar . C

Dept. of Electrical and Electronics EngineeringPES Institute of Technology, Bangalore

INDIA

Objective of the present work

Introduction

Block diagram of the proposed system

Circuit diagram of the Interleaved Boost Converter

Design and Development

Simulation Results

Hardware implementation

Conclusion

References

Tuesday, August 11, 2015PES Institute of Technology, Bangalore, INDIA 2

Contents

Design, simulation and hardware implementation ofthe proposed two stage interleaved convertertopology with reduced inductor volume.


Objective of the present work

The voltage levels obtained from renewable energy sourcesare low and unregulated.

These renewable energy systems require a suitableconverter to increase and regulate their output voltagelevel.

Most commonly used converter to accomplish this is aBoost converter.


Introduction

Certain disadvantages observed in conventional Boost Converters are:

The output voltage significantly decreases with increase in the load and theDC bus voltage is not regulated.

Normal boost topologies are no more favourable as the power line pollutionbecause harmonics have reached a critical level.

For high power applications, there exists issues such as high stresses on thepower semiconductor switches, high input and output current ripples, andlow power density of the converter.

These issues have been reduced by Boost converters called the InterleavedBoost Converter (IBC).


Interleaved Boost Converters are specialized boostconverter topologies.

The converter components are paralleled into number ofstages, with the paralleled stages having common sourceand load.

Interleaved Boost Converter consist of two parallel-connected boost power trains operated with a phasedifference of 1800 .


Interleaved Boost Converter

Unlike the continuous conduction mode (CCM) technique,BCM offers inherent zero current switching of the boostdiodes.

This permits the use of less expensive diodes withoutsacrificing efficiency.

For efficient switching of the two MOSFETS and to ensurethat there is no extra heat generated, IC SG3525 has beenused to drive MOSFETS.


Advantages of IBC over traditional single stage boostconverters include:

Substantial reduction in input & output current ripple

Higher power density

Higher current handling capacity

Improved efficiency

Faster response



Block diagram of the proposed system

Block diagram of the Power Electronic System


Circuit Diagram of IBC

Circuit diagram of Interleaved Boost Converter


Design and Development

IBC has been designed using standard steady – state equations, to a power level of 60W PFC application.

The input considered is 15V, and the switching frequency in the neighborhood of 15kHz

Parameter Value

Input Voltage 15V

Inductance (Boost) 71µH

Switching frequency 16kHz

Switching device FDP18N50/DPF18N50; 500V, 18A

Duty cycle 0.5

Output capacitance 1000µF/50V


Component Specification


Simulated output gating pulses for the two MOSFETS

Simulation Results


Input voltage and input current waveforms which are in phase


Simulated inductor current with and without interleaving


Parameter Value

Input Voltage 15.05V

Input current 4.55A

Output voltage 29.82A

Output current 1.99A

Summary of hardware results


Hardware Implementation

Laboratory set up for the hardware prototype

The designed IBC has been implemented under laboratory set – up and tested up to 60W successfully.

For closed loop control, PWM control IC SG3525 has been used

Switching device used is FDP18N50/DPF18N50 (500V, 18A)



Hardware implementation of the Interleaved Boost Converter


Hardware Results

Waveform across the two switches & output voltage obtained from hardware circuit implementation with a level of about 30V

A power level of 60W was achievable with the realised hardwaresetup.

The design was been able to support a load of 1.99 A and couldachieve an efficiency of above 86.66%.

The input and output filters can be smaller due to ripple currentcancellation and effective doubling of the switching frequency.

It has been seen that the efficiency, size, and cost can beminimized with the proposed topology.


Conclusion

The topology can be modified to drive multiple loadsof higher ratings using an appropriate power switchand suitable heat sink.

The converter can be suitably modified to make useof solar energy as a source with minimum number ofbattery to drive high rated load.


Future Work

[1] Jen-Ta Sul, Chih-Wen Liu, Chuan-Sheng Cheng and Chung-Wen Hung , “A Self Calibration Scheme for

Improved Current Share of Multiphase DC-DC Converter,” IEEE Trans., 978-1-4577-1216, June 2012.

[2] Oun Lee and Gun-Woo Moon, “Soft Switching DC/DC Converter with a full ZVS Range and Reduced Output

Filter for High-VoltageApplications,” IEEE Trans. on power electronics, vol.28, no.1, Jan 2013.

[3] GU Jun-Yin, WU Hong, N Guo, “Research on Photovoltaic Grid-Connected Inverter Based on Soft-Switching

Interleaved Fly back Converter,” 8th International Conference on Power Electronics-ECCE Asia, May 30-June 3,

2011, IEEE Trans.978-1-61284-947, July 2011.

[4] Pyosoo Kim, Sanghyuk Lee, Junsung Park and Sewan Choi, “High Step-Up Interleaved Boost Converters using

Voltage Multiplier Cells,” IEEE Trans. 978-1-4244-5046, June 2010.

[5] C.N.M. Ho, H.Breuninger, S.Pettersson, G.Escobar, L.Serpa and A.Cocci, “Practical Implementation of an

Interleaved Boost Converter using SiC Diode for PV applications,” 8th International Conference on Power

Electronics-ECCE Asia, May 30-June 3,2011, IEEE Trans.978-1-61284-957, July 2010.


References

[6] Xiaojun Xu, Wei Liu and Alex Q. Huang,“Two-Phase Interleaved Critical Mode PFC Boost Converter with

Closed Loop Interleaving Strategy,” IEEE Trans. Power Electronics, vol. 24, pp. 3003 3013, No. 12, December

2009.

[7] Laszlo Huber, Brian T. Irving and Milan M. Jovanovi 𝑐, “Closed-Loop Control Methods for Interleaved

DCM/CCM Boundary Boost PFC Converters, ”IEEE Proc., Applied Power Electronics Conference and

Exposition, 2009, pp. 991 997.

[8] Nadia Smith and Roy McCann, “Analysis and Simulation of aMultiple Input Interleaved Boost Converter for

Renewable Energy Applications,” IEEE Proc., Telecommunications Energy Conf., 2014.

[9] Jo 𝑎oBosco RF. Cabral, Tiago Lemes da Silva, S 𝑒rgio Vidal Garcia Oliveira, YalesR 𝑜mulo de Novaes, “A New

High Gain Non - Isolated Dc-Dc Boost Converter for Photovoltaic Application,” IEEE Proc., Power

Electronics Conf. 2013, pp. 569 574.

[10] Heinz van der Broeck, Ibrahim Tezcan, “1 kW Dual Interleaved Boost Converter for Low Voltage

Applications,” IEEE, IPEMC, 2006.



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OPTIMAL DESIGN OF AN INTERLEAVED DC-DC SWITCH MODE CONVERTER · Interleaved Boost Converters are specialized boost converter topologies. The converter components are paralleled into