Abstract: An Interleaved Buck Converter (IBC) with continuous input current, extremely low output current ripple, low switching losses and improved step-down conversion ratio is presented in this work. The new interleaved buck converter has lower voltage stress in comparison to the conventional IBC and also can provide a high step-down ratio which makes it a proper choice for high power applications. Also new interleaved buck converter can provide current-sharing between two interleaved modules without using additional current-sharing control method. The new interleaved buck converter is simulated by using MATLAB/Simulink and the experimental results can be obtained.
Keywords: Two Phase Interleaved Buck Converter, Continuous Conduction Mode, low switching voltage stress.
Title: Comparative Study of Interleaved Buck Converters
Author: Vinny Babu, Prof. Ninu Joy, Prof. Honey Susan Eldo
ISSN 2349-7815
International Journal of Recent Research in Electrical and Electronics Engineering (IJRREEE)
Paper Publications
An Active Input Current Waveshaping with Zero Switching Losses for Three-Phas...IDES Editor
In this paper a zero voltage switched active network
(Fig. 1) which can be used in conjunction with single-phase or
three-phase ac to dc diode rectifiers is presented. It is shown
that application of the proposed switching network in threephase
ac to dc boost converter yields zero switching losses
while maintaining a unity input power factor. Active network
capacitor, Cs, diodes D7, and D8, maintain a zero voltage during
turn-off of Q1, and Q2, Capacitor, Cs, discharges through
the boost inductors of the circuit thus limiting the rate of rise
of current during turn-on. Moreover, the advantage of the
proposed active network is that it can maintain a zero voltage
switching over the entire range of the duty cycle of the operation.
Consequently, boost stage can be used directly to control
the dc bus voltage by varying the duty cycle at Constant switching
frequency. The resulting advantages include higher
switching frequencies, and better efficiency. Finally the operation
of the active switching network is verified experimentally
on a prototype three-phase ac to dc converter.
Comparative Steady State Analysis of Boost and Cascaded Boost Converter with ...IAES-IJPEDS
In this paper, an overall comparison between the Boost Converter (BC) &
Cascaded Converter/ Cascaded Boost Converter (CBC) has been depicted in
terms of ideal condition, as well as with the consideration of Equivalent
Series Resistance (ESR) of inductor(s). The loss comparison in the two
converters due to the ESR is also included in this paper. It can be seen that in
CBC, voltage gain is more but the power loss due to ESR is also more
compared to BC. The parameters of the converters are derived with a
consideration of per unit ripple quantity of inductor current and capacitor
voltage. A boundary condition between the continuous conduction mode
(CCM) & discontinuous conduction mode (DCM) of the inductor current is
also shown. The behaviour of the capacitor current for the converters is
discussed during ON and OFF condition of the switch(es) during DCM. At
the end, the simulation results of both the converters are given for a
20V/100V, 100 W output. The analysis and simulation results are presented
in this paper for the verification of the feasibility.
International Journal of Engineering Research and DevelopmentIJERD Editor
Electrical, Electronics and Computer Engineering,
Information Engineering and Technology,
Mechanical, Industrial and Manufacturing Engineering,
Automation and Mechatronics Engineering,
Material and Chemical Engineering,
Civil and Architecture Engineering,
Biotechnology and Bio Engineering,
Environmental Engineering,
Petroleum and Mining Engineering,
Marine and Agriculture engineering,
Aerospace Engineering.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
Research Inventy : International Journal of Engineering and Science is published by the group of young academic and industrial researchers with 12 Issues per year. It is an online as well as print version open access journal that provides rapid publication (monthly) of articles in all areas of the subject such as: civil, mechanical, chemical, electronic and computer engineering as well as production and information technology. The Journal welcomes the submission of manuscripts that meet the general criteria of significance and scientific excellence. Papers will be published by rapid process within 20 days after acceptance and peer review process takes only 7 days. All articles published in Research Inventy will be peer-reviewed.
An Active Input Current Waveshaping with Zero Switching Losses for Three-Phas...IDES Editor
In this paper a zero voltage switched active network
(Fig. 1) which can be used in conjunction with single-phase or
three-phase ac to dc diode rectifiers is presented. It is shown
that application of the proposed switching network in threephase
ac to dc boost converter yields zero switching losses
while maintaining a unity input power factor. Active network
capacitor, Cs, diodes D7, and D8, maintain a zero voltage during
turn-off of Q1, and Q2, Capacitor, Cs, discharges through
the boost inductors of the circuit thus limiting the rate of rise
of current during turn-on. Moreover, the advantage of the
proposed active network is that it can maintain a zero voltage
switching over the entire range of the duty cycle of the operation.
Consequently, boost stage can be used directly to control
the dc bus voltage by varying the duty cycle at Constant switching
frequency. The resulting advantages include higher
switching frequencies, and better efficiency. Finally the operation
of the active switching network is verified experimentally
on a prototype three-phase ac to dc converter.
Comparative Steady State Analysis of Boost and Cascaded Boost Converter with ...IAES-IJPEDS
In this paper, an overall comparison between the Boost Converter (BC) &
Cascaded Converter/ Cascaded Boost Converter (CBC) has been depicted in
terms of ideal condition, as well as with the consideration of Equivalent
Series Resistance (ESR) of inductor(s). The loss comparison in the two
converters due to the ESR is also included in this paper. It can be seen that in
CBC, voltage gain is more but the power loss due to ESR is also more
compared to BC. The parameters of the converters are derived with a
consideration of per unit ripple quantity of inductor current and capacitor
voltage. A boundary condition between the continuous conduction mode
(CCM) & discontinuous conduction mode (DCM) of the inductor current is
also shown. The behaviour of the capacitor current for the converters is
discussed during ON and OFF condition of the switch(es) during DCM. At
the end, the simulation results of both the converters are given for a
20V/100V, 100 W output. The analysis and simulation results are presented
in this paper for the verification of the feasibility.
International Journal of Engineering Research and DevelopmentIJERD Editor
Electrical, Electronics and Computer Engineering,
Information Engineering and Technology,
Mechanical, Industrial and Manufacturing Engineering,
Automation and Mechatronics Engineering,
Material and Chemical Engineering,
Civil and Architecture Engineering,
Biotechnology and Bio Engineering,
Environmental Engineering,
Petroleum and Mining Engineering,
Marine and Agriculture engineering,
Aerospace Engineering.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
Research Inventy : International Journal of Engineering and Science is published by the group of young academic and industrial researchers with 12 Issues per year. It is an online as well as print version open access journal that provides rapid publication (monthly) of articles in all areas of the subject such as: civil, mechanical, chemical, electronic and computer engineering as well as production and information technology. The Journal welcomes the submission of manuscripts that meet the general criteria of significance and scientific excellence. Papers will be published by rapid process within 20 days after acceptance and peer review process takes only 7 days. All articles published in Research Inventy will be peer-reviewed.
Various Resonant Converters for high voltage and high power applications have been designed. Different Topologies of LLC, LCC, and CLL Resonant Converters have been simulated and compared for the same input voltage. The simulation was done at a very high frequency. The Output Power and the Efficiency of all the three Resonant Converters were calculated.With the results, it has been proved that LCC Resonant Converters were very much suited to give an output voltage of around 62 Kilovolts with a output power of 20 kilowatts.
This paper presents the simulation design of dc/dc interleaved boost converter with zero-voltage switching (ZVS). By employin the interleaved structure, the input current stresses to switching devices were reduced and this signified to a switching conduction loss reduction. All the parameters had been calculated theoretically. The proposed converter circuit was simulated by using MATLAB/Simulink and PSpice software programmes. The converter circuit model, with specifications of output power of 200 W, input voltage range from 10~60 V, and operates at 100 kHz switching frequency was simulated to validate the designed parameters. The results showed that the main switches of the model converter circuit achieved ZVS conditions during the interleaving operation. Consequently, the switching losses in the main switching devices were reduced. Thus, the proposed converter circuit model offers advantages of input current stress and switching loss reductions. Hence, based on the designed parameters and results, the converter model can be extended for hardware implementation.
Analysis of 7-Level Cascaded & MLDCLI with Sinusoidal PWM & Modified Referenc...IJMTST Journal
Multilevel inverter offers several advantages compare to the conventional three phase bridge inverter in terms of lower dv/dt stresses, lower electromagnetic compatibility and better THD features. The primary use of DC to AC conversion & speed control of machines also voltage controller and reduce the harmonics in the levels of inverter by using cascade multilevel inverter. This paper presents a comparison of cascaded and multilevel dc link inverter (MLDCLI) Using only a DC power source and capacitors. A MLDCLI can be constructed by the series connection half and full bridge cells each having its own DC source .A multilevel voltage source inverter can be formed by connecting an MLDCL with a single bridge inverter. The MLDCL provides a DC voltage with the shape of a staircase with or without pulse width modulation (PWM) to the bridge inverter, which in turn alternates the polarity to produce an AC voltage. compared with the cascaded multilevel inverter, The MLDCLI can significantly reduce the switch count as the number of voltage levels increases beyond five for a given number of voltage levels , m , the required number of active switches is 2(m -1) for the existing multilevel inverter but is m+3 for the MLDCL inverters.
This paper presents the performance of a seven level cascaded multilevel inverter &MLDCLI Based on a sinusoidalPWM and modified Reference PWM control techniques. Performance analysis is made based on the results of simulation study conducted on the operation of the cascaded & MLDCLI using MATLAB/SIMULINK. The performance parameters chosen in the work include the waveform pattern harmonic spectrum, fundamental value & total harmonic distortion (THD) of the three phase cascaded H-Bridge MLI & MLDCLI.
Power Factor Corrected Bridgeless Converter Based Improved Power Quality Swit...paperpublications3
Abstract: Many electronic appliances powered up from the utility, utilize the classical method of AC-DC rectification which involves a diode bridge rectifier (DBR) followed by a large electrolytic capacitor. The uncontrolled charging and discharging of this capacitor instigates harmonic rich current being drawn from the utility which goes against the international power quality standard limits. Personal computer (PC) is one of the electronic equipment which is severely affected by power quality problems. Switched Mode Power Supply (SMPS) is an integral part of the computer that converts AC to multiple numbers of suitable DC voltages to impart power to different parts of the PC. It contains a diode bridge rectifier (DBR) with a capacitor filter followed by an isolated DC-DC converter to achieve multiple dc output voltages of different ratings. That result in a highly distorted, high crest factor, periodically dense input current at the single phase ac mains; this violates the limits of international power quality (PQ) standards such as IEC 61000 -3-2 . Employing various power factor corrected (PFC) single-stage and two stage converters effect a perceivable PQ improvement in these SMPSs. Hence from the analysis of different power factor converters a bridgeless buck boost converter is designed and implemented here for near unity power factor.
Keywords: Switched mode power supplies(SMPS), Power Factor correction(PFC) Converter, Power Quality, DC-to-DC Converters, AC-DC rectification.
Title: Power Factor Corrected Bridgeless Converter Based Improved Power Quality Switched Mode Power Supply
Author: Stephy Mathew, Asst. Prof. Nayana J, Asst. Prof. Remya K P
ISSN 2349-7815
International Journal of Recent Research in Electrical and Electronics Engineering (IJRREEE)
Paper Publications
Abstract: AC-DC soft-switching resonant converter with interleaved boost power factor corrector (PFC) is presented. In this converter, an interleaved boost PFC circuit is integrated with a soft-switching resonant converter. High power factor is achieved by the interleaved boost PFC circuit. The input current can be shared among the inductors so that high reliability, power factor and efficiency in power system can be obtained and ripples are also reduced. Another advantage of interleaved technique is reduction of THD. Thus the converter performance can be improved. The voltage across the main switches is confined to the dc-link voltage. Soft-switching operation of main switches and output diodes is achieved. Hence the switching losses are reduced significantly. Therefore, the overall efficiency is improved. Circuit is simulated with 110V AC input voltage and 45V DC output voltage is verified. Performance parameters such as voltage stress and output ripple are also analyzed. The simulation is done in PSIM. Power factor of 0.96 is achieved with this converter. For the hardware, dsPIC30F2010 is used for generating PWM pulse with switching frequency 90 kHz.
Keywords: Power factor correction (PFC), Soft switching, Resonant converter, Interleaved Boost converter.
Title: Resonant AC-DC Converter with Interleaved Boost PFC
Author: Aqulin Ouseph, Prof. Kiran Boby, Prof. Neena Mani
ISSN 2349-7815
International Journal of Recent Research in Electrical and Electronics Engineering (IJRREEE)
Paper Publications
Prof. Cuk invited talk at APEC 2011 plenary session to celebrate
35 years of his creation of this modeling and analysis method.
This talk was also recorded on video by IEEE.tv and can be viewed together. Here is a link to that video.
https://youtu.be/BLx57J2fF5w
Note: first few minutes of the video is Prof. Cuk's interview made after his presentation. This is thern followed by full 25 minutes presentation, which can be followed by the enclosed 67 slides.
call for paper 2012, hard copy of journal, research paper publishing, where t...IJERD Editor
call for paper 2012, hard copy of journal, research paper publishing, where to publish research paper,
journal publishing, how to publish research paper, Call For research paper, international journal, publishing a paper, IJERD, journal of science and technology, how to get a research paper published, publishing a paper, publishing of journal, publishing of research paper, reserach and review articles, IJERD Journal, How to publish your research paper, publish research paper, open access engineering journal, Engineering journal, Mathemetics journal, Physics journal, Chemistry journal, Computer Engineering, Computer Science journal, how to submit your paper, peer reviw journal, indexed journal, reserach and review articles, engineering journal, www.ijerd.com, research journals,
yahoo journals, bing journals, International Journal of Engineering Research and Development, google journals, hard copy of journal
A Low Cost Single-Switch Bridgeless Boost PFC ConverterIJPEDS-IAES
This paper proposes the single-switch bridgeless boost power factor correction (PFC) converter to achieve high efficiency in low cost. The proposed converter utilizes only one active switching device forPFC operation as well as expecting higher efficiency than typical boost PFC converters. On the other hand, the implementation cost is less than traditional bridgeless boost PFC converters, in where two active switching deivces are necessary. The operational principle, the modeling, and the control scheme of the proposed converter arediscussed in detail. In order to verify the operation of the proposed converter, a 500W switching model is built in PSIM software package. The simulation results show that the proposed converter perfectly achieves PFC operation with only a single active switch.
Research Inventy : International Journal of Engineering and Science is published by the group of young academic and industrial researchers with 12 Issues per year. It is an online as well as print version open access journal that provides rapid publication (monthly) of articles in all areas of the subject such as: civil, mechanical, chemical, electronic and computer engineering as well as production and information technology. The Journal welcomes the submission of manuscripts that meet the general criteria of significance and scientific excellence. Papers will be published by rapid process within 20 days after acceptance and peer review process takes only 7 days. All articles published in Research Inventy will be peer-reviewed.
IMPLEMENTATION OF DISCONTINUOUS INDUCTOR CURRENT MODE IN CUK CONVERTERS FED B...Journal For Research
This paper presents a bridgeless Cuk converter-fed brushless DC (BLDC) motor drive. A Bridgeless Cuk converter is constructed to operate at discontinuous inductor current mode to improve the quality of power and power factor at the AC mains for better speed control. The bridgeless converter is designed for obtaining the low conduction losses and requirement of low size of heat sink for the switches. TI-TMS320-F2812-based Digital Signal Processor (DSP) is used for the development of the hardware prototype of proposed BLDC motor drive.
Research Inventy : International Journal of Engineering and Science is published by the group of young academic and industrial researchers with 12 Issues per year. It is an online as well as print version open access journal that provides rapid publication (monthly) of articles in all areas of the subject such as: civil, mechanical, chemical, electronic and computer engineering as well as production and information technology. The Journal welcomes the submission of manuscripts that meet the general criteria of significance and scientific excellence. Papers will be published by rapid process within 20 days after acceptance and peer review process takes only 7 days. All articles published in Research Inventy will be peer-reviewed.
Research Inventy : International Journal of Engineering and Science is published by the group of young academic and industrial researchers with 12 Issues per year. It is an online as well as print version open access journal that provides rapid publication (monthly) of articles in all areas of the subject such as: civil, mechanical, chemical, electronic and computer engineering as well as production and information technology. The Journal welcomes the submission of manuscripts that meet the general criteria of significance and scientific excellence. Papers will be published by rapid process within 20 days after acceptance and peer review process takes only 7 days. All articles published in Research Inventy will be peer-reviewed.
This paper presents a step up DC-to-DC converter with hybrid switch capacitor technique having high voltage conversion ratio with small switch voltage stress . The converter is suitable for the applications where high voltage conversion is required. The proposed DC-DC converter has low voltage ratted MOSFET switch and is connected to PV array to get high output voltage at small duty ratios. Hence it has high efficiency. The principles of operations and the theoretical analysis are presented in this paper. All the simulations are done in MATLAB- SIMULINK Environment and results were obtained with voltage conversion ratio of 4.9.
Transformerless Buck-Boost Converter With Positive Output Voltage and Nominal...paperpublications3
Abstract: This article deals with a transformerless buck-boost converter with simple structure. By inserting an additional switched network into the traditional buck-boost converter new converter is obtained. Compared with the traditional buck-boost converter, its voltage gain is quadratic of the traditional buck-boost converter. It can operate in a wide range of output voltage, that is, the proposed buck-boost converter can achieve high or low voltage gain without extreme duty cycle. Moreover, the output voltage of this transformerless buck-boost converter is common-ground with the input voltage, and its polarity is positive. The two power switches of the proposed buck-boost converter operate synchronously. The operating principles and the steady-state analyses for the buck-boost converter operating in CCM are presented. The PSIM simulations are provided to compare and validate the effectiveness of the buck-boost converter.
Keywords: Buck-Boost, Transformerless, Positive Output Voltage, Quadratic Gain.
Title: Transformerless Buck-Boost Converter With Positive Output Voltage and Nominal Duty Ratio
Author: Aleena Paul K, Prof.Sini Paul, Prof.Geethu James
International Journal of Recent Research in Electrical and Electronics Engineering (IJRREEE)
Paper Publications
Various Resonant Converters for high voltage and high power applications have been designed. Different Topologies of LLC, LCC, and CLL Resonant Converters have been simulated and compared for the same input voltage. The simulation was done at a very high frequency. The Output Power and the Efficiency of all the three Resonant Converters were calculated.With the results, it has been proved that LCC Resonant Converters were very much suited to give an output voltage of around 62 Kilovolts with a output power of 20 kilowatts.
This paper presents the simulation design of dc/dc interleaved boost converter with zero-voltage switching (ZVS). By employin the interleaved structure, the input current stresses to switching devices were reduced and this signified to a switching conduction loss reduction. All the parameters had been calculated theoretically. The proposed converter circuit was simulated by using MATLAB/Simulink and PSpice software programmes. The converter circuit model, with specifications of output power of 200 W, input voltage range from 10~60 V, and operates at 100 kHz switching frequency was simulated to validate the designed parameters. The results showed that the main switches of the model converter circuit achieved ZVS conditions during the interleaving operation. Consequently, the switching losses in the main switching devices were reduced. Thus, the proposed converter circuit model offers advantages of input current stress and switching loss reductions. Hence, based on the designed parameters and results, the converter model can be extended for hardware implementation.
Analysis of 7-Level Cascaded & MLDCLI with Sinusoidal PWM & Modified Referenc...IJMTST Journal
Multilevel inverter offers several advantages compare to the conventional three phase bridge inverter in terms of lower dv/dt stresses, lower electromagnetic compatibility and better THD features. The primary use of DC to AC conversion & speed control of machines also voltage controller and reduce the harmonics in the levels of inverter by using cascade multilevel inverter. This paper presents a comparison of cascaded and multilevel dc link inverter (MLDCLI) Using only a DC power source and capacitors. A MLDCLI can be constructed by the series connection half and full bridge cells each having its own DC source .A multilevel voltage source inverter can be formed by connecting an MLDCL with a single bridge inverter. The MLDCL provides a DC voltage with the shape of a staircase with or without pulse width modulation (PWM) to the bridge inverter, which in turn alternates the polarity to produce an AC voltage. compared with the cascaded multilevel inverter, The MLDCLI can significantly reduce the switch count as the number of voltage levels increases beyond five for a given number of voltage levels , m , the required number of active switches is 2(m -1) for the existing multilevel inverter but is m+3 for the MLDCL inverters.
This paper presents the performance of a seven level cascaded multilevel inverter &MLDCLI Based on a sinusoidalPWM and modified Reference PWM control techniques. Performance analysis is made based on the results of simulation study conducted on the operation of the cascaded & MLDCLI using MATLAB/SIMULINK. The performance parameters chosen in the work include the waveform pattern harmonic spectrum, fundamental value & total harmonic distortion (THD) of the three phase cascaded H-Bridge MLI & MLDCLI.
Power Factor Corrected Bridgeless Converter Based Improved Power Quality Swit...paperpublications3
Abstract: Many electronic appliances powered up from the utility, utilize the classical method of AC-DC rectification which involves a diode bridge rectifier (DBR) followed by a large electrolytic capacitor. The uncontrolled charging and discharging of this capacitor instigates harmonic rich current being drawn from the utility which goes against the international power quality standard limits. Personal computer (PC) is one of the electronic equipment which is severely affected by power quality problems. Switched Mode Power Supply (SMPS) is an integral part of the computer that converts AC to multiple numbers of suitable DC voltages to impart power to different parts of the PC. It contains a diode bridge rectifier (DBR) with a capacitor filter followed by an isolated DC-DC converter to achieve multiple dc output voltages of different ratings. That result in a highly distorted, high crest factor, periodically dense input current at the single phase ac mains; this violates the limits of international power quality (PQ) standards such as IEC 61000 -3-2 . Employing various power factor corrected (PFC) single-stage and two stage converters effect a perceivable PQ improvement in these SMPSs. Hence from the analysis of different power factor converters a bridgeless buck boost converter is designed and implemented here for near unity power factor.
Keywords: Switched mode power supplies(SMPS), Power Factor correction(PFC) Converter, Power Quality, DC-to-DC Converters, AC-DC rectification.
Title: Power Factor Corrected Bridgeless Converter Based Improved Power Quality Switched Mode Power Supply
Author: Stephy Mathew, Asst. Prof. Nayana J, Asst. Prof. Remya K P
ISSN 2349-7815
International Journal of Recent Research in Electrical and Electronics Engineering (IJRREEE)
Paper Publications
Abstract: AC-DC soft-switching resonant converter with interleaved boost power factor corrector (PFC) is presented. In this converter, an interleaved boost PFC circuit is integrated with a soft-switching resonant converter. High power factor is achieved by the interleaved boost PFC circuit. The input current can be shared among the inductors so that high reliability, power factor and efficiency in power system can be obtained and ripples are also reduced. Another advantage of interleaved technique is reduction of THD. Thus the converter performance can be improved. The voltage across the main switches is confined to the dc-link voltage. Soft-switching operation of main switches and output diodes is achieved. Hence the switching losses are reduced significantly. Therefore, the overall efficiency is improved. Circuit is simulated with 110V AC input voltage and 45V DC output voltage is verified. Performance parameters such as voltage stress and output ripple are also analyzed. The simulation is done in PSIM. Power factor of 0.96 is achieved with this converter. For the hardware, dsPIC30F2010 is used for generating PWM pulse with switching frequency 90 kHz.
Keywords: Power factor correction (PFC), Soft switching, Resonant converter, Interleaved Boost converter.
Title: Resonant AC-DC Converter with Interleaved Boost PFC
Author: Aqulin Ouseph, Prof. Kiran Boby, Prof. Neena Mani
ISSN 2349-7815
International Journal of Recent Research in Electrical and Electronics Engineering (IJRREEE)
Paper Publications
Prof. Cuk invited talk at APEC 2011 plenary session to celebrate
35 years of his creation of this modeling and analysis method.
This talk was also recorded on video by IEEE.tv and can be viewed together. Here is a link to that video.
https://youtu.be/BLx57J2fF5w
Note: first few minutes of the video is Prof. Cuk's interview made after his presentation. This is thern followed by full 25 minutes presentation, which can be followed by the enclosed 67 slides.
call for paper 2012, hard copy of journal, research paper publishing, where t...IJERD Editor
call for paper 2012, hard copy of journal, research paper publishing, where to publish research paper,
journal publishing, how to publish research paper, Call For research paper, international journal, publishing a paper, IJERD, journal of science and technology, how to get a research paper published, publishing a paper, publishing of journal, publishing of research paper, reserach and review articles, IJERD Journal, How to publish your research paper, publish research paper, open access engineering journal, Engineering journal, Mathemetics journal, Physics journal, Chemistry journal, Computer Engineering, Computer Science journal, how to submit your paper, peer reviw journal, indexed journal, reserach and review articles, engineering journal, www.ijerd.com, research journals,
yahoo journals, bing journals, International Journal of Engineering Research and Development, google journals, hard copy of journal
A Low Cost Single-Switch Bridgeless Boost PFC ConverterIJPEDS-IAES
This paper proposes the single-switch bridgeless boost power factor correction (PFC) converter to achieve high efficiency in low cost. The proposed converter utilizes only one active switching device forPFC operation as well as expecting higher efficiency than typical boost PFC converters. On the other hand, the implementation cost is less than traditional bridgeless boost PFC converters, in where two active switching deivces are necessary. The operational principle, the modeling, and the control scheme of the proposed converter arediscussed in detail. In order to verify the operation of the proposed converter, a 500W switching model is built in PSIM software package. The simulation results show that the proposed converter perfectly achieves PFC operation with only a single active switch.
Research Inventy : International Journal of Engineering and Science is published by the group of young academic and industrial researchers with 12 Issues per year. It is an online as well as print version open access journal that provides rapid publication (monthly) of articles in all areas of the subject such as: civil, mechanical, chemical, electronic and computer engineering as well as production and information technology. The Journal welcomes the submission of manuscripts that meet the general criteria of significance and scientific excellence. Papers will be published by rapid process within 20 days after acceptance and peer review process takes only 7 days. All articles published in Research Inventy will be peer-reviewed.
IMPLEMENTATION OF DISCONTINUOUS INDUCTOR CURRENT MODE IN CUK CONVERTERS FED B...Journal For Research
This paper presents a bridgeless Cuk converter-fed brushless DC (BLDC) motor drive. A Bridgeless Cuk converter is constructed to operate at discontinuous inductor current mode to improve the quality of power and power factor at the AC mains for better speed control. The bridgeless converter is designed for obtaining the low conduction losses and requirement of low size of heat sink for the switches. TI-TMS320-F2812-based Digital Signal Processor (DSP) is used for the development of the hardware prototype of proposed BLDC motor drive.
Research Inventy : International Journal of Engineering and Science is published by the group of young academic and industrial researchers with 12 Issues per year. It is an online as well as print version open access journal that provides rapid publication (monthly) of articles in all areas of the subject such as: civil, mechanical, chemical, electronic and computer engineering as well as production and information technology. The Journal welcomes the submission of manuscripts that meet the general criteria of significance and scientific excellence. Papers will be published by rapid process within 20 days after acceptance and peer review process takes only 7 days. All articles published in Research Inventy will be peer-reviewed.
Research Inventy : International Journal of Engineering and Science is published by the group of young academic and industrial researchers with 12 Issues per year. It is an online as well as print version open access journal that provides rapid publication (monthly) of articles in all areas of the subject such as: civil, mechanical, chemical, electronic and computer engineering as well as production and information technology. The Journal welcomes the submission of manuscripts that meet the general criteria of significance and scientific excellence. Papers will be published by rapid process within 20 days after acceptance and peer review process takes only 7 days. All articles published in Research Inventy will be peer-reviewed.
This paper presents a step up DC-to-DC converter with hybrid switch capacitor technique having high voltage conversion ratio with small switch voltage stress . The converter is suitable for the applications where high voltage conversion is required. The proposed DC-DC converter has low voltage ratted MOSFET switch and is connected to PV array to get high output voltage at small duty ratios. Hence it has high efficiency. The principles of operations and the theoretical analysis are presented in this paper. All the simulations are done in MATLAB- SIMULINK Environment and results were obtained with voltage conversion ratio of 4.9.
Transformerless Buck-Boost Converter With Positive Output Voltage and Nominal...paperpublications3
Abstract: This article deals with a transformerless buck-boost converter with simple structure. By inserting an additional switched network into the traditional buck-boost converter new converter is obtained. Compared with the traditional buck-boost converter, its voltage gain is quadratic of the traditional buck-boost converter. It can operate in a wide range of output voltage, that is, the proposed buck-boost converter can achieve high or low voltage gain without extreme duty cycle. Moreover, the output voltage of this transformerless buck-boost converter is common-ground with the input voltage, and its polarity is positive. The two power switches of the proposed buck-boost converter operate synchronously. The operating principles and the steady-state analyses for the buck-boost converter operating in CCM are presented. The PSIM simulations are provided to compare and validate the effectiveness of the buck-boost converter.
Keywords: Buck-Boost, Transformerless, Positive Output Voltage, Quadratic Gain.
Title: Transformerless Buck-Boost Converter With Positive Output Voltage and Nominal Duty Ratio
Author: Aleena Paul K, Prof.Sini Paul, Prof.Geethu James
International Journal of Recent Research in Electrical and Electronics Engineering (IJRREEE)
Paper Publications
A High Step Up Hybrid Switch Converter Connected With PV Array For High Volt...ijitjournal
T
his paper
presents
a
ste
p up DC
-
to
-
DC converter with
hybrid switch capacitor technique having
high
voltage conversion ratio with small
switch voltage stress
. The converter is suitable for the applications
where high voltage conversion is required. The proposed
DC
-
DC converter
has low voltage ratted
MOSFET switch and is connected to PV array to get high output voltage at small duty ratios.
Hence it has
high efficiency.
The principles of operations and the theoretical analysis are presented in this paper.
All the
simulations are
done in MATLAB
-
SIMULINK Environment and
results were obtained with voltage
conversion ratio of 4.
Abstract: A traditional boost converter cannot provide high voltage gain because of the equivalent series resistance present in the circuit. Studies are going on to develop high gain boost converters without extremely high duty ratio. Coupled inductor or transformer link can be used in to get a high step up converter. Transformer links make the circuit bulkier. A dual switch step up converter is a compact solution to get high conversion ratio. High voltage gain can be obtained in a dual switch boost converter, with a low voltage and current stress on the switches. Here a method to further improve the voltage gain of a dual switch converter is presented. A dual switch step up DC/DC converter circuit with high voltage gain is explained. The converter achieves high voltage gain with a low duty cycle. For the same conversion ratio, voltage stress across the switches is also low compared to the traditional dual switch converter. Simulation results in MATLAB/Simulink are also presented.
Interleaved Boost Converter with Cumulative Voltage Unitpaperpublications3
Abstract: A boost converter is a DC to DC converter with an output voltage greater than the source voltage. But it produces large input current ripple. In order to improve the efficiency of the boost converter and reduce the ripple current, an interleaved boost converter is used. An interleaved boost converter consists of several boost converters connected in parallel with switching frequency and a phase shift of 180˚. A new interleaved high step-up DC-DC converter with the circuit of cumulative voltage unit (CVU) is presented in this work. This converter is suitable for the high gain applications. Only two switches are required to form the boosting path and the interleaved topology. Each CVU module can share common diodes to reduce the number of the components and step up the voltage gain. The interleaved structure in the input end can reduce the power loss in each current-owing component and the input current ripple. The interleaved boost converter with voltage summation unit can be verified by using MATLAB/SIMULINK.
Keywords: Cumulative voltage unit, Boost converter, Interleaved boost converter, Voltage Stress.
Title: Interleaved Boost Converter with Cumulative Voltage Unit
Author: Shyma H, Prof. Smitha Paulose, Prof. Leela Salim
ISSN 2349-7815
International Journal of Recent Research in Electrical and Electronics Engineering (IJRREEE)
Paper Publications
Abstract: Energy from the sun and the wind can alleviate the pressure on traditional sources that has been considerably depleted. Many stages of renewable energy conversion require DC-DC converters with high voltage gain and high power. The applications where electrical isolation is not necessary, transformer less high gain converters can be used in order to avoid the difficulty of using large capacity transformers. This is a step up resonant converter which can achieve high voltage-gain using LC parallel resonant tank. Zero-voltage-switching (ZVS) of semiconductor devices in a resonant converter can be achieved by resonant devices. It is characterized by ZVS turn-on and nearly ZVS turn-off of main switches. Moreover, the equivalent voltage stress of the semiconductor devices is lower than other resonant step up converters. A resonant converter is simulated using MATLAB/SIMULINK and experimental results are also verified.
Keywords: Frequency Modulation, Resonant Converter, Zero Voltage Switching, Voltage Stress.
Title: Variable Switching Frequency Based Resonant Converter
Author: Anooja Shahul, Prof. Annie P Oommen, Prof. Sera Mathew
ISSN 2349-7815
International Journal of Recent Research in Electrical and Electronics Engineering (IJRREEE)
Paper Publications
International Journal of Engineering Research and Applications (IJERA) is a team of researchers not publication services or private publications running the journals for monetary benefits, we are association of scientists and academia who focus only on supporting authors who want to publish their work. The articles published in our journal can be accessed online, all the articles will be archived for real time access.
Our journal system primarily aims to bring out the research talent and the works done by sciaentists, academia, engineers, practitioners, scholars, post graduate students of engineering and science. This journal aims to cover the scientific research in a broader sense and not publishing a niche area of research facilitating researchers from various verticals to publish their papers. It is also aimed to provide a platform for the researchers to publish in a shorter of time, enabling them to continue further All articles published are freely available to scientific researchers in the Government agencies,educators and the general public. We are taking serious efforts to promote our journal across the globe in various ways, we are sure that our journal will act as a scientific platform for all researchers to publish their works online.
Transformer less Boost Converter Topologies with Improved Voltage Gain Operat...IJMER
In this project, a new step up converter proposed in a recent work is analyzed, designed, simulated with MATLAB Simulink. Conventional dc–dc boost converters are unable to provide high step-up voltage gains due to the effect of power switches, rectifier diodes, and the equivalent series resistance of inductors and capacitors. This paper proposes transformer less dc–dc converters to achieve high step-up voltage gain without an extremely high duty ratio. In the proposed converters, two inductors with the same level of inductance are charged in parallel during the switch-on period and are discharged in series during the switch-off period. The structures of the proposed converters are very simple.
This project envisages a Buck dc – dc
converter mathematical analysis and simulation. This power
regulator is made up of some vital circuit elements such as
inductor, freewheeling diode, filter capacitor and electronics
power switch. The circuit is analysed based on two modes of
operation namely: continuous current conduction mode and
discontinuous current mode. Ansoft Simplorer software is
used to carry out the circuit simulation under the two modes
of operation which aided in verifying the calculated results.
Both calculated and simulated waveforms are displayed. The
results obtained are very similar.
A new closed loop AC to DC ĈUK converter is presented in this paper. The conventional ĈUK AC to DC converter has no feedback circuit. Thereby, the output voltage of the converter changes while changing the load. The proposed closed loop converter can regulate voltage with the variation of load over a wide range. Moreover, the power factor and Total Harmonic Distortion (THD) of the supply side current found quite satisfactory from this closed loop ĈUK converter. The converter operates in four steps with a different combination of voltage polarities and switching states. The feedback path consists of a voltage control loop and a current control loop. The closed loop ĈUK converter in this study is compared with the open loop version. Additionally, the comparison is made with the conventional converter of the same topology. The effectiveness in terms of power factor and THD of the proposed converter is verified using simulation results.
Low Current Ripple, High Efficiency Boost Converter with Voltage MultiplierIJMTST Journal
An innovative high voltage-gain boost converter, which is made for home inverters contains the combination
of switched capacitors and coupled inductors made a voltage multiplier, which is used to increase the output
gain of a traditional converter abnormally without using an excessive switching frequency. The setup not only
maximizes the efficiency but also eliminates input current ripple almost, which deduces conduction losses
and current stress of switches causes to greater extension of input source lifetime. In addition, due to the
lossless passive clamp performance, leakage energy is recycled to the output terminal. Hence, large voltage
spikes across the main switches are alleviated, and the efficiency is improved. Even the low voltage stress
makes the low-voltage-rated MOSFETs be embraced for reductions conduction losses and expense.
Ultimately, the prototype circuit with 24-V input voltage, 230-V output, and 1000-W output power is operated
to verify its performance. The greatest effectiveness is 97.1 %.
This paper presents the improved single phase AC-DC super lift Luo converter for enhancing quality of power by mitigating the issues. The proposed converter is used for output voltage control, power factor improvement and reduced source current harmonics at supply side. The main intention of this work is to design appropriate closed loop controllers for this AC-DC super lift Luo converter to achieve unity power factor in the source end. The designed control system comprises of two control loops, voltage control in outer loop and the current controller is devised in the inner loop. Fuzzy controller is used for current controller whereas PI controller as voltage controller. In the MATLAB/SIMULINK platform, simulation of the proposed AC-DC super lift Luo converter is done. It is clear from the simulation results that PI integrated fuzzy controller for voltage and control is proven to be better than classical PI with hysteresis controllers. The proposed system is able to achieve high input power factor along with supply current harmonic distortions of less than 5%.
A Comparative Study of Various AC-DC Converters for Low Voltage Energy Harves...paperpublications3
Abstract: Electromagnetic microscale and mesoscale power generators with low voltage outputs are now widely used as kinetic energy harvesters. The extrinsic vibrations on the generator can excite the internal oscillations between the proof mass magnet and the electrical damper coils. These oscillations produce a periodically varying magnetic flux in coil, inducing a corresponding AC output voltage. This output can be converted to dc and can be used to supply power to electronic loads. The conventional AC-DC converters for energy harvesting system with diode rectifiers suffer considerable voltage drop resulting increase in power loss of circuitry and complexity. As a remedy various bridgeless boost converters were designed and implemented. Standard H bridge converter with 4 switch or 2 switch, dual polarity boost converters, parallel combination of boost and buck-boost converter, integrated boost and buck-boost combination bridgeless rectifier are some of these. These circuits are studied, simulated and compared. The simulation models are drawn and simulated using MATLAB R2010a.
Interleaved High Step-Down Synchronous Convertertheijes
For low output voltage, high output current systems applications, Synchronous switching power converters give better performance than non synchronous converters. This paper presents an interleaved synchronous buck converter which has low switch voltage stress with high conversion ratio. The input current can be shared among the inductors so that high reliability and efficiency can be obtained and ripples also reduced, the converter performance can be improved. Thus converter features automatic uniform current sharing characteristic of the interleaved phases without adding extra circuitry or complex control methods. Capacitors switching circuits are combined with interleaved four-phase buck converter for getting a high step-down conversion ratio without adopting an extreme short duty ratio. Synchronous rectifier technology is adopted to increase the converter efficiency. A 30V input voltage, 1.8V output voltage, circuit is simulated to verify the performance. The simulation is done in MATLAB/SIMULINK R2012a.
Non Isolated Bidirectional DC-DC Converter with High Voltage Gainpaperpublications3
Abstract: Dependence of the extracted power of the photovoltaic (PV) and wind energies on environmental specifications and low dynamic response of Fuel cells cause a battery to be required in these systems. In order to charge and discharge the battery, a bidirectional converter is needed. In this paper, a non-isolated bidirectional DC-DC converter is presented. The converter consists of two boost converters to enhance the voltage gain. Four power switches are employed in the converter with their body diodes. Two inductors and a capacitor are also employed as passive components. The input current is divided to the inductor which causes the efficiency to be high and the size of them to become smaller. The voltage gain of the converter is higher than the Conventional Cascaded Bidirectional buck/boost Converter (CCBC) in step-up mode. Besides, the voltage gain in step-down mode is lower than CCBC. Circuit is simulated with 25/250V input voltage and 250/25V DC output voltage is verified. Performance parameters such as voltage stress and output ripples are also analyzed. The efficiency of the converter is more than CCBC while the total stress on active switches are same. The simulation is done in MATLAB R2014a.
Keywords: DC-DC converter, High voltage gain converter, Non-isolated bidirectional converter, Voltage Stress.
Title: Non Isolated Bidirectional DC-DC Converter with High Voltage Gain
Author: Fathima Anooda M P, Prof. Elizabeth Paul, Prof. Honey Susan Eldo
ISSN 2349-7815
International Journal of Recent Research in Electrical and Electronics Engineering (IJRREEE)
Paper Publications
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Comparative Study of Interleaved Buck Converters
1. ISSN 2349-7815
International Journal of Recent Research in Electrical and Electronics Engineering (IJRREEE)
Vol. 4, Issue 2, pp: (61-68), Month: April - June 2017, Available at: www.paperpublications.org
Page | 61
Paper Publications
Comparative Study of Interleaved Buck
Converters
Vinny Babu1
, Prof. Ninu Joy2
, Prof. Honey Susan Eldo3
1
PG Scholar, Dept. of EEE, Mar Athanasius College of Engineering, Kothamangalam, Kerala, India
2,3
Assistant Professor, Dept. of EEE, Mar Athanasius College of Engineering, Kothamangalam, Kerala, India
Abstract: An Interleaved Buck Converter (IBC) with continuous input current, extremely low output current
ripple, low switching losses and improved step-down conversion ratio is presented in this work. The new
interleaved buck converter has lower voltage stress in comparison to the conventional IBC and also can provide a
high step-down ratio which makes it a proper choice for high power applications. Also new interleaved buck
converter can provide current-sharing between two interleaved modules without using additional current-sharing
control method. The new interleaved buck converter is simulated by using MATLAB/Simulink and the
experimental results can be obtained.
Keywords: Two Phase Interleaved Buck Converter, Continuous Conduction Mode, low switching voltage stress.
I. INTRODUCTION
Now adays, the tendency to use high performance high step-down DC-DC converters, in applications such as VRMs for
microprocessors and battery chargers, has increased [1]. For non-isolated low output current ripple applications,
interleaved buck converter (IBC) is an excellent choice due to its simple structure and control. Although, the conventional
IBC has some advantages, like current sharing capability between modules, current ripple cancellation and fast transient
response, but it suffers from few disadvantages. First of all, voltage stress of switches and diodes of conventional IBC is
equal to the input voltage which is an important disadvantage in high input voltage applications. So, high voltage
semiconductor devices should be used, where they suffer from high on resistance, high forward voltage drop, high output
capacitor and high cost. High voltage across switches and diodes, before turn-on and after turn-off causes high switching
losses and high losses related to reverse recovery of diodes [2]. So, a three level buck converter is introduced to reduce
voltage stress of its switches and diodes are half of its input voltage but the conversion ratio is still similar to the
conventional buck converter.
II. INTERLEAVED BUCK CONVERTER
The conventional interleaved buck converter is shown in Fig.1. This converter having two switches Q1 and Q2, diodes D1
and D2, and inductors L1 and L2 only. The conventional interleaved buck converter has many disadvantages are high
ripple current and voltage stress. To overcome the disadvantages of conventional interleaved buck converter, introduce a
new interleaved buck converter. The new interleaved buck converter is shown in Fig.2 which suitable for high input
voltage, high step-down, non-isolated applications with low output current and continuous input current. It is similar to a
three- level buck converter, but the two input capacitors are not connected to each other and also there is an auxiliary
inductor at the converter output stage. The two active switches are controlled by two PWM pulses 180 degrees out of
phase. The converter has four distinct operating intervals in a switching period. The operating waveforms are shown in
Fig.3 and detailed operation modes of the converter also explained.
2. ISSN 2349-7815
International Journal of Recent Research in Electrical and Electronics Engineering (IJRREEE)
Vol. 4, Issue 2, pp: (61-68), Month: April - June 2017, Available at: www.paperpublications.org
Page | 62
Paper Publications
Fig.1. Conventional Interleaved Buck Converter Fig.2. New Interleaved Buck Converter
A. Modes of Operation:
(a). Mode 1[t0 −t1]
Fig.4 shows the equivalent circuit of the new IBC in this interval. Prior to this interval both switches are off, the
freewheeling diodes are conducting and the input capacitors Cin1 and Cin2 are charged. At t0, Q1 is turned on, so D1 turns
off. In this interval Cin2 is charged through Vin and L1, and also Cin1 is being discharged through L1-Lo-Co. In addition, L1
current is increasing through both of the mentioned current paths. L2 current is decreasing in this state.
Fig.3. Theoretical Waveforms
3. ISSN 2349-7815
International Journal of Recent Research in Electrical and Electronics Engineering (IJRREEE)
Vol. 4, Issue 2, pp: (61-68), Month: April - June 2017, Available at: www.paperpublications.org
Page | 63
Paper Publications
Fig.4. Mode1 (Equivalent circuit)
Voltages and current equation of this interval are as following,
VL1 (t) = VCin1 – Vout – VLo (t) = Vin – VCin2 (1)
VLo (t) = Vin + Vout – VCin1 – VCin2 (2)
VL2 (t) = -Vout – VLo (t) (3)
ILo (t) = IL1 + IL2 + Iin (t) (4)
(b). Mode 2[t1 − t3]
Fig.5 shows the equivalent circuit of the new IBC in this interval. This interval starts when Q1 turns off. By turning Q1
off, L1 continues it’s current and turns D1 on. Part of the inductor current which was flowing in Cin1-L1-Lo-Co, continues
its path through D1-L1-Lo-Co, and the other part of L1 current runs through Vin-Cin1-D1-L1-Cin2. So, during this interval, L1
and L2 are discharging and Cin1 and Cin2 are charging through Vin-Cin1-D1-L1-Cin2 and Vin-Cin1-L2-D2-Cin2.
Fig.5. Mode2 (Equivalent circuit)
Using KVL law in D1-L1-Lo-Co and D2-L2-Lo-Co path, VL1 and VL2 are obtained as following,
VL1 (t) = -Vout – VLo (t) (5)
4. ISSN 2349-7815
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Paper Publications
VL2 (t) = -Vout – VLo (t) (6)
And for Vin-Cin1-D1-L1-Cin2 and Vin-Cin1-L2-D2-Cin2 paths VL1 and VL2 would be
VL1 (t) = Vin – VCin1 – VCin2 (7)
VL2 (t) = Vin – VCin1 – VCin2 (8)
So, VLo in this interval is
VLo (t) = Vin + Vout – VCin1 – VCin2 (9)
As it’s obvious, (9) is the same as (2). According to Volt- Second-Balance (VSB), for Lo in one switching period, VLo is
VLo (t) = 0 (10)
Also from KCL law, ILo (t) in this interval is
ILo (t) = IL1 + IL2 - Iin(t) (11)
Due to symmetric operation of two modules in an interleaved buck converter, the operations of interval 3 and interval 4
are similar to those of interval 1 and interval 2.
III. SIMULATION MODEL AND RESULTS
In order to verify the operation principle and the theoretical analysis, conventional and new interleaved buck converters
are simulated with MATLAB/SIMULINK simulation software and the simulation parameters are listed in Table.1. All
switches using in simulation are ideal switches. Switching frequency is takenas100kHz.
TABLE I: SIMULATION PARAMETERS
A. Simulink Model:
Simulink model of conventional and new interleaved buck converters are shown in Fig.7 and Fig.8. MOSFET’s are used
as switches. Output voltage, output current ripple and stresses across switches are analyzed from the simulation results.
Fig.7. Simulink model of Conventional Interleaved Buck Converter
5. ISSN 2349-7815
International Journal of Recent Research in Electrical and Electronics Engineering (IJRREEE)
Vol. 4, Issue 2, pp: (61-68), Month: April - June 2017, Available at: www.paperpublications.org
Page | 65
Paper Publications
Fig.8. Simulink model of New Interleaved Buck Converter
B. Simulation Results:
Fig.9 shows the switching pulseforbothconventionalandnewinterleavedbuckconverter.The two active switches are controlled by two
PWM pulses 180 degrees out of phase. Fig.10 shows that input voltage waveform. Input voltage is given to both
converters are 200V. Fig.11 and Fig.12 shows that output voltage waveform of conventional and new interleaved buck
converter respectively. For conventional interleaved buck converter, 47.7V is obtained and for new interleaved buck
converter, 26.5V is obtained. Fig.13 and Fig.14 shows that inductor current waveform of both conventional and new
interleaved buck converter. Fig.15 and Fig.16 shows that input current waveform of conventional and new interleaved
buck converter respectively. Input current waveform of new interleaved buck converter is continuous compared to
conventional interleaved buck converter. Fig.17 and Fig.18 shows that output current waveform of conventional and new
interleaved buck converter respectively. For conventional interleaved buck converter, 19.87A is obtained and for new
interleaved buck converter, 11.042A is obtained. Fig.19 and Fig.20 shows that voltage stress across switches for
conventional and new interleaved buck converter respectively. Voltage stress across switches in conventional interleaved
buck converter is 200V and for new interleaved buck converter is 116V.
Fig.9. Switching Pulse
6. ISSN 2349-7815
International Journal of Recent Research in Electrical and Electronics Engineering (IJRREEE)
Vol. 4, Issue 2, pp: (61-68), Month: April - June 2017, Available at: www.paperpublications.org
Page | 66
Paper Publications
Fig.10. Input Voltage Waveform of CIBC and NIBC
Fig.11. Output Voltage Waveform of CIBC Fig.12. Output Voltage Waveform of NIBC
Fig.13. Inductor Current of CIBC Fig.14. Inductor Current of NIBC
7. ISSN 2349-7815
International Journal of Recent Research in Electrical and Electronics Engineering (IJRREEE)
Vol. 4, Issue 2, pp: (61-68), Month: April - June 2017, Available at: www.paperpublications.org
Page | 67
Paper Publications
Fig.15. Input Current Waveform of CIBC Fig.16. Input Current Waveform of NIBC
Fig.17. Output Current Waveform of CIBC Fig.18. Output Current Waveform of NIBC
Fig.19. Voltage Stress of Switches in CIBC Fig.20. Voltage Stress of Switches in NIBC
TABLE II: COMPARATIVE STUDY
Parameters Conventional IBC New IBC
Output Voltage 47.7 V 26.5 V
Voltage Stress across Switch 200 V 116 V
Output Current Ripple 0.335 A 0.084 A
Output Voltage Ripple 0.850 V 0.084 A
Input Current Discontinuous Continuous
Stepdown Conversion Ratio 0.24 0.13
8. ISSN 2349-7815
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Vol. 4, Issue 2, pp: (61-68), Month: April - June 2017, Available at: www.paperpublications.org
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Paper Publications
Table II shows that comparative study of conventional and new interleaved buck converter. Output voltage is reduced by
44.4%. Voltage stress across Q1 & Q2 decreased by 42% for both switches. Output current ripple of new interleaved buck
converter is reduced by 74.92%. Voltage conversion ratio is improved by 45.83%. And also, input current of new
interleaved buck converter is continuous compared to conventional interleaved buck converter.
IV. CONCLUSIONS
An interleaved DC-DC step down converter for low output voltage and high output current suitable for VRM application
is presented here. The paper explains clearly the operating principle of two phases IBC with equivalent circuits. The new
interleaved buck converter has many advantages like improved step-down conversion ratio, extremely low output current
ripple and low switching losses. Also, the voltage stress of semiconductor components in the new interleaved buck
converter is much smaller than the conventional interleaved buck converter. All these benefits are obtained without
applying any additional voltage or current stress on the components.
REFERENCES
[1] Pit-Leong Wong, Peng Xu, B. Yang and F.C. Lee, “Performance improvements of interleaving VRMs with coupling
inductors,” IEEE Trans. Power Electron., vol.16, no.4, pp.499, 507, Jul 2001.
[2] Xiong Du, Luowei Zhou, Heng-Ming Tai, “Double-frequency buck converter,” IEEE Trans. Ind. Electron., vol.56,
no.5, pp.1690,1698, May 2009.
[3] Il-Oun Lee, Shin-Young Cho, Gun-Woo Moon, “Interleaved buck converter having low switching losses and
improved step-down conversion ratio,” IEEE Trans. Power Electron., vol.27, no.8, pp.3664,3675, Aug. 2012.
[4] Ching-Tsai Pan, Chen-Feng Chuang, Chia-Chi Chu, “A novel transformerless interleaved high step-down
conversion ratio DC–DC converter with low switch voltage stress,” IEEE Trans. Ind. Electron., vol.61, no.10,
pp.5290,5299, Oct. 2014.
[5] Peng Xu, Jia Wei, Lee F.C, “Multiphase coupled-buck converter-a novel high efficient 12 V voltage regulator
module," IEEE Trans. Power Electron., vol.18, no.1, pp.74,82, Jan 2003.
[6] Xinbo Ruan Bin Li, Qianhong Chen, Siew-Chong Tan, Tse C.K, “Fundamental considerations of three-level DC–
DC converters: topologies, analyses, and control,” IEEE Trans. Circuits and Systems I: Regular Papers, vol.55,
no.11, pp.3733,3743, Dec. 2008.
[7] X. Ruan, J. Wei and Y. Xue, “Three-level converters with the input and output sharing the ground,” Power
Electronics Specialist Conference, 2003. PESC '03. 2003 IEEE 34th Annual, vol.4, no., pp.1919, 1923 vol.4, 1June
2003.
![ISSN 2349-7815
International Journal of Recent Research in Electrical and Electronics Engineering (IJRREEE)
Vol. 4, Issue 2, pp: (61-68), Month: April - June 2017, Available at: www.paperpublications.org
Page | 61
Paper Publications
Comparative Study of Interleaved Buck
Converters
Vinny Babu1
, Prof. Ninu Joy2
, Prof. Honey Susan Eldo3
1
PG Scholar, Dept. of EEE, Mar Athanasius College of Engineering, Kothamangalam, Kerala, India
2,3
Assistant Professor, Dept. of EEE, Mar Athanasius College of Engineering, Kothamangalam, Kerala, India
Abstract: An Interleaved Buck Converter (IBC) with continuous input current, extremely low output current
ripple, low switching losses and improved step-down conversion ratio is presented in this work. The new
interleaved buck converter has lower voltage stress in comparison to the conventional IBC and also can provide a
high step-down ratio which makes it a proper choice for high power applications. Also new interleaved buck
converter can provide current-sharing between two interleaved modules without using additional current-sharing
control method. The new interleaved buck converter is simulated by using MATLAB/Simulink and the
experimental results can be obtained.
Keywords: Two Phase Interleaved Buck Converter, Continuous Conduction Mode, low switching voltage stress.
I. INTRODUCTION
Now adays, the tendency to use high performance high step-down DC-DC converters, in applications such as VRMs for
microprocessors and battery chargers, has increased [1]. For non-isolated low output current ripple applications,
interleaved buck converter (IBC) is an excellent choice due to its simple structure and control. Although, the conventional
IBC has some advantages, like current sharing capability between modules, current ripple cancellation and fast transient
response, but it suffers from few disadvantages. First of all, voltage stress of switches and diodes of conventional IBC is
equal to the input voltage which is an important disadvantage in high input voltage applications. So, high voltage
semiconductor devices should be used, where they suffer from high on resistance, high forward voltage drop, high output
capacitor and high cost. High voltage across switches and diodes, before turn-on and after turn-off causes high switching
losses and high losses related to reverse recovery of diodes [2]. So, a three level buck converter is introduced to reduce
voltage stress of its switches and diodes are half of its input voltage but the conversion ratio is still similar to the
conventional buck converter.
II. INTERLEAVED BUCK CONVERTER
The conventional interleaved buck converter is shown in Fig.1. This converter having two switches Q1 and Q2, diodes D1
and D2, and inductors L1 and L2 only. The conventional interleaved buck converter has many disadvantages are high
ripple current and voltage stress. To overcome the disadvantages of conventional interleaved buck converter, introduce a
new interleaved buck converter. The new interleaved buck converter is shown in Fig.2 which suitable for high input
voltage, high step-down, non-isolated applications with low output current and continuous input current. It is similar to a
three- level buck converter, but the two input capacitors are not connected to each other and also there is an auxiliary
inductor at the converter output stage. The two active switches are controlled by two PWM pulses 180 degrees out of
phase. The converter has four distinct operating intervals in a switching period. The operating waveforms are shown in
Fig.3 and detailed operation modes of the converter also explained.](https://image.slidesharecdn.com/comparativestudyofinterleavedbuck-170627111114/85/Comparative-Study-of-Interleaved-Buck-Converters-1-320.jpg)
![ISSN 2349-7815
International Journal of Recent Research in Electrical and Electronics Engineering (IJRREEE)
Vol. 4, Issue 2, pp: (61-68), Month: April - June 2017, Available at: www.paperpublications.org
Page | 62
Paper Publications
Fig.1. Conventional Interleaved Buck Converter Fig.2. New Interleaved Buck Converter
A. Modes of Operation:
(a). Mode 1[t0 −t1]
Fig.4 shows the equivalent circuit of the new IBC in this interval. Prior to this interval both switches are off, the
freewheeling diodes are conducting and the input capacitors Cin1 and Cin2 are charged. At t0, Q1 is turned on, so D1 turns
off. In this interval Cin2 is charged through Vin and L1, and also Cin1 is being discharged through L1-Lo-Co. In addition, L1
current is increasing through both of the mentioned current paths. L2 current is decreasing in this state.
Fig.3. Theoretical Waveforms](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)