This document summarizes a research paper on a solar-based interleaved boost converter with zero-voltage switching and zero-current switching. The converter uses two boost converters connected in parallel with a phase shift to reduce ripple and improve efficiency. Soft-switching techniques are used to reduce switching losses. Simulation results show the converter maintains a constant output voltage while the induction motor output varies with time, and PWM signals control the switches. The converter achieves a power factor of 0.93 and performs efficiently for power conversion from solar panels.
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.
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 Scienceresearchinventy
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.
Fuzzy based control of Transformer less Coupled inductor based DC-DC converterIJERA Editor
Most of the industrial applications use any one of the basic DC-DC converter configurations namely buck,
boost, buck–boost, and Cuk converters. These converters are non-isolating converters. Buck-boost converters
use inductors for storing energy from the source and release the same to load or output. This results in high
stress across magnetic components. This drawback restricts usage of buck-boost converters to low power
applications. Flyback converters popularly have known as buck-boost converters uses transformers for
achieving wide range of step down and step up voltages. Coupled inductor based converters or tapped inductor
based converters are used for achieving wide input – wide output conversion ratios. Coherent transition between
step-down and step-up modes is achieved by a proper control scheme. This paper proposes fuzzy logic based
closed loop control scheme for control of converter switches. Theoretical derivations of control parameters with
their membership values, mamdani based rules for development of fuzzy rules and simulation results of a
coupled inductor based DC-DC converter using MATLAB / SIMULINK are concluded.
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.
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 Scienceresearchinventy
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.
Fuzzy based control of Transformer less Coupled inductor based DC-DC converterIJERA Editor
Most of the industrial applications use any one of the basic DC-DC converter configurations namely buck,
boost, buck–boost, and Cuk converters. These converters are non-isolating converters. Buck-boost converters
use inductors for storing energy from the source and release the same to load or output. This results in high
stress across magnetic components. This drawback restricts usage of buck-boost converters to low power
applications. Flyback converters popularly have known as buck-boost converters uses transformers for
achieving wide range of step down and step up voltages. Coupled inductor based converters or tapped inductor
based converters are used for achieving wide input – wide output conversion ratios. Coherent transition between
step-down and step-up modes is achieved by a proper control scheme. This paper proposes fuzzy logic based
closed loop control scheme for control of converter switches. Theoretical derivations of control parameters with
their membership values, mamdani based rules for development of fuzzy rules and simulation results of a
coupled inductor based DC-DC converter using MATLAB / SIMULINK are concluded.
An Asymmetrical Dc-Dc Converter with a High Voltage GainIJMER
An asymmetrical full bridge converter is proposed in the paper. The proposed converter
achieves zero voltage switching of all the power switches. Zero current switching of all the output diodes
are also achieved here. This in turn provides a highly efficienct operation. The proposed converter can
provide a high voltage gain and the voltages across the semi- conductor devices are effectively clamped.
The converter can be utilised effectively in high voltage applications as embedded systems, renewable
energy systems, fuel cells, mobility applications and uninterrupted power supply
Design of Half Bridge LLC Resonant Converter for Low Voltage Dc ApplicationsIOSRJEEE
An advanced hybrid LLC series resonant converter with united flying-capacitor cell is proposed in this paper to permit the high step-down conversion in the high input voltage applications. The in-built flyingcapacitor branch in the primary side can efficiently share out the primary switch voltage stress related with the half-bridge LLC converters. And the input voltage can be shared correspondingly and automatically between the two series half-bridge components lacking additional balance circuit or control strategies owing to the built-in flying- capacitor cell. Likewise, the inherent soft switching performance in extensive load range that exists in the LLC converters is still kept to decrease the switching losses, which ensures the high efficiency. In addition, the proposed converter can be comprehensive to reduce the switch voltage stress byemploying stacked connection. Finally, a 500∼640 Vinput 48 Voutput 1 kW prototype is built and tested to verify the efficiency of the proposed converter. The results prove that the proposed converter is an excellent candidate for the high input voltage and high step-down dc/dc conversion systems.
Hysteresis SVM for Coupled Inductor Z Source Diode Clamped 3-Level Inverter B...IAES-IJPEDS
Due to its advantages such as it can defeat problems such as leakage current
and insertion of DC in the grid and provides low stress on power devices,
Diode-clamped three-level inverter (DCTLI) is habitually used in
transformerless photovoltaic (PV) connected to grid network. But it still has
a problem of shoot-through which dwells in its legs, so its operation not
reliable. Z source network is employed to permit operation without shoot
through risk and improve its reliability. Coupled inductors are replaced the
line transformers in to attain lower cost, reduced size, and improved its
reliability and efficiency. Coupled inductor which avoids leakage current
problem and losses. It employs coupled inductor z source diode clamped
three level inverter (CI-Z-DC-TLI) to boost the voltage and further progress
the consistency of the proposed system by avoiding the shoot through the
problem. The proposed system assures that common-mode voltage
and shoot-through risk is avoided. Moreover, controlling DC-TLI with
Hysteresis SVM algorithm which improves output voltage and current
control. Simulation and experimental results of this proposed system were
analyzed using MATLAB environment and FPGA hardware.
Design of an Integrated Power Factor Converter with PI Controller for Low Pow...IOSRJEEE
In this paper, an integrated power factor converter with PI controller is proposed. The circuit topology is obtained by integrating two converters namely the buck converter and a boost converter. The boost converter is normally a step up converter which obtain an unity power factor and performs low harmonics at the input. Based on the simple circuit topology and easy control the boost converter or buck-boost converter is used as power factor correctors. Similarly the buck converter regulates the dc-link voltage and provide a stable dc output voltage. To achieve unity power factor, the output voltage of both converter should be higher than the amplitude of the ac line voltage. The steady -state analysis is developed and a design is provided
A Novel Three Phase Multi-string Multilevel Inverter with High DC-DC Closed o...rnvsubbarao koppineni
this inverter reduces
number power devices and high performances.
Before this inverter provide a high step up DC-DC
converter with PI controller for better conversion
efficiency and to improve the output dc voltage of
varies renewable energy sources. This multi-string
multilevel inverter consists of six switches only
instead of eight switches in cascaded H-bridge
multilevel inverter in order to reduce conversion
losses. The main objective of this paper is to save
cost and size by removing any kind of transformer
as well as reducing the power devices
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.
This paper proposes a non-isolated soft-switching bidirectional dc/dc converter for interfacing energy storage in DC microgrid. The proposed converter employs a half-bridge boost converter at input port followed by a LCC resonant tank to assist in soft-switching of switches and diodes, and finally a voltage doubler circuit at the output port to enhance the voltage gain by two times. The LCC resonant circuit also adds a suitable voltage gain to the converter. Therefore, overall high voltage gain of the converter is obtained without a transformer or large number of multiplier circuit. For operation in buck mode, the high side voltage is divided by half with capacitive divider to gain higher step-down ratio. The converter is operated at high frequency to obtain low output voltage ripple, reduced magnetics and filters. Zero voltage turn-on is achieved for all switches and zero current turn-on and turn-off is achieved for all diodes in both modes i.e., buck/boost operation. Voltage stress across switches and diode is clamped naturally without external snubber circuit. An experimental prototype has been designed, built and tested in the laboratory to verify the performance of the proposed converter.
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology.
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.
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
Comparative Study of Different Five level inverters Using POD Control Strategypaperpublications3
Abstract: Multilevel converters are increasingly being considered for high power applications because of their ability to operate at higher output voltages while producing lower levels of harmonic components in the switched output voltages. This paper proposed a simulation model of four different typologies of single phase five-level inverter. The study investigated four topologies of multilevel inverter namely Flying Capacitor Multilevel Inverter (FCMLI), Diode Clamped Multilevel Inverter (DCMLI), Cascaded H-bridge Multilevel inverter (CHMLI) and POD inverter. These topologies were compared in terms of Total Harmonic Distortion (THD and the number of power electronic components being utilized. The simulation result was conducted using MATLAB/SIMULINK. The findings showed that the POD PWM H-Bridge topology has the lowest total harmonic distortion (THD).
Keywords: Cascade, DCMLI, FCMLI, Multicarrier PWM, Multilevel, multilevel inverter, total harmonic distortion, stepped wave inverter.
Title: Comparative Study of Different Five level inverters Using POD Control Strategy
Author: Jisha Gopinath, Neena Mani, Veena Mathew
ISSN 2349-7815
International Journal of Recent Research in Electrical and Electronics Engineering (IJRREEE)
Paper Publications
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
The use of distributed generation (DG) within distribution systems has increased for the last two decades due to worldwide increase in demand for electricity and governmental policy change from “conventional” energy to “green” energy. High levels of penetration of DG have many significant benefits but also come with many drawbacks such as voltage drop and power losses. This study presents the impact of DG at different locations in a distribution feeder in terms of the feeder voltage profile. A radial distribution system is simulated using PSCAD/EMTDC simulation software while changing the size and location of DG in the system. The obtained results are used for better understanding on the impact of DG on voltage profile in radial distribution feeder.
An Asymmetrical Dc-Dc Converter with a High Voltage GainIJMER
An asymmetrical full bridge converter is proposed in the paper. The proposed converter
achieves zero voltage switching of all the power switches. Zero current switching of all the output diodes
are also achieved here. This in turn provides a highly efficienct operation. The proposed converter can
provide a high voltage gain and the voltages across the semi- conductor devices are effectively clamped.
The converter can be utilised effectively in high voltage applications as embedded systems, renewable
energy systems, fuel cells, mobility applications and uninterrupted power supply
Design of Half Bridge LLC Resonant Converter for Low Voltage Dc ApplicationsIOSRJEEE
An advanced hybrid LLC series resonant converter with united flying-capacitor cell is proposed in this paper to permit the high step-down conversion in the high input voltage applications. The in-built flyingcapacitor branch in the primary side can efficiently share out the primary switch voltage stress related with the half-bridge LLC converters. And the input voltage can be shared correspondingly and automatically between the two series half-bridge components lacking additional balance circuit or control strategies owing to the built-in flying- capacitor cell. Likewise, the inherent soft switching performance in extensive load range that exists in the LLC converters is still kept to decrease the switching losses, which ensures the high efficiency. In addition, the proposed converter can be comprehensive to reduce the switch voltage stress byemploying stacked connection. Finally, a 500∼640 Vinput 48 Voutput 1 kW prototype is built and tested to verify the efficiency of the proposed converter. The results prove that the proposed converter is an excellent candidate for the high input voltage and high step-down dc/dc conversion systems.
Hysteresis SVM for Coupled Inductor Z Source Diode Clamped 3-Level Inverter B...IAES-IJPEDS
Due to its advantages such as it can defeat problems such as leakage current
and insertion of DC in the grid and provides low stress on power devices,
Diode-clamped three-level inverter (DCTLI) is habitually used in
transformerless photovoltaic (PV) connected to grid network. But it still has
a problem of shoot-through which dwells in its legs, so its operation not
reliable. Z source network is employed to permit operation without shoot
through risk and improve its reliability. Coupled inductors are replaced the
line transformers in to attain lower cost, reduced size, and improved its
reliability and efficiency. Coupled inductor which avoids leakage current
problem and losses. It employs coupled inductor z source diode clamped
three level inverter (CI-Z-DC-TLI) to boost the voltage and further progress
the consistency of the proposed system by avoiding the shoot through the
problem. The proposed system assures that common-mode voltage
and shoot-through risk is avoided. Moreover, controlling DC-TLI with
Hysteresis SVM algorithm which improves output voltage and current
control. Simulation and experimental results of this proposed system were
analyzed using MATLAB environment and FPGA hardware.
Design of an Integrated Power Factor Converter with PI Controller for Low Pow...IOSRJEEE
In this paper, an integrated power factor converter with PI controller is proposed. The circuit topology is obtained by integrating two converters namely the buck converter and a boost converter. The boost converter is normally a step up converter which obtain an unity power factor and performs low harmonics at the input. Based on the simple circuit topology and easy control the boost converter or buck-boost converter is used as power factor correctors. Similarly the buck converter regulates the dc-link voltage and provide a stable dc output voltage. To achieve unity power factor, the output voltage of both converter should be higher than the amplitude of the ac line voltage. The steady -state analysis is developed and a design is provided
A Novel Three Phase Multi-string Multilevel Inverter with High DC-DC Closed o...rnvsubbarao koppineni
this inverter reduces
number power devices and high performances.
Before this inverter provide a high step up DC-DC
converter with PI controller for better conversion
efficiency and to improve the output dc voltage of
varies renewable energy sources. This multi-string
multilevel inverter consists of six switches only
instead of eight switches in cascaded H-bridge
multilevel inverter in order to reduce conversion
losses. The main objective of this paper is to save
cost and size by removing any kind of transformer
as well as reducing the power devices
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.
This paper proposes a non-isolated soft-switching bidirectional dc/dc converter for interfacing energy storage in DC microgrid. The proposed converter employs a half-bridge boost converter at input port followed by a LCC resonant tank to assist in soft-switching of switches and diodes, and finally a voltage doubler circuit at the output port to enhance the voltage gain by two times. The LCC resonant circuit also adds a suitable voltage gain to the converter. Therefore, overall high voltage gain of the converter is obtained without a transformer or large number of multiplier circuit. For operation in buck mode, the high side voltage is divided by half with capacitive divider to gain higher step-down ratio. The converter is operated at high frequency to obtain low output voltage ripple, reduced magnetics and filters. Zero voltage turn-on is achieved for all switches and zero current turn-on and turn-off is achieved for all diodes in both modes i.e., buck/boost operation. Voltage stress across switches and diode is clamped naturally without external snubber circuit. An experimental prototype has been designed, built and tested in the laboratory to verify the performance of the proposed converter.
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology.
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.
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
Comparative Study of Different Five level inverters Using POD Control Strategypaperpublications3
Abstract: Multilevel converters are increasingly being considered for high power applications because of their ability to operate at higher output voltages while producing lower levels of harmonic components in the switched output voltages. This paper proposed a simulation model of four different typologies of single phase five-level inverter. The study investigated four topologies of multilevel inverter namely Flying Capacitor Multilevel Inverter (FCMLI), Diode Clamped Multilevel Inverter (DCMLI), Cascaded H-bridge Multilevel inverter (CHMLI) and POD inverter. These topologies were compared in terms of Total Harmonic Distortion (THD and the number of power electronic components being utilized. The simulation result was conducted using MATLAB/SIMULINK. The findings showed that the POD PWM H-Bridge topology has the lowest total harmonic distortion (THD).
Keywords: Cascade, DCMLI, FCMLI, Multicarrier PWM, Multilevel, multilevel inverter, total harmonic distortion, stepped wave inverter.
Title: Comparative Study of Different Five level inverters Using POD Control Strategy
Author: Jisha Gopinath, Neena Mani, Veena Mathew
ISSN 2349-7815
International Journal of Recent Research in Electrical and Electronics Engineering (IJRREEE)
Paper Publications
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
The use of distributed generation (DG) within distribution systems has increased for the last two decades due to worldwide increase in demand for electricity and governmental policy change from “conventional” energy to “green” energy. High levels of penetration of DG have many significant benefits but also come with many drawbacks such as voltage drop and power losses. This study presents the impact of DG at different locations in a distribution feeder in terms of the feeder voltage profile. A radial distribution system is simulated using PSCAD/EMTDC simulation software while changing the size and location of DG in the system. The obtained results are used for better understanding on the impact of DG on voltage profile in radial distribution feeder.
IOSR Journal of Applied Chemistry (IOSR-JAC) is an open access international journal that provides rapid publication (within a month) of articles in all areas of applied chemistry and its applications. The journal welcomes publications of high quality papers on theoretical developments and practical applications in Chemical Science. Original research papers, state-of-the-art reviews, and high quality technical notes are invited for publications.
Review of Step down Converter with Efficient ZVS OperationIJRST Journal
This paper presents the review of step down converter with efficient ZVS operation. The designed buck converter uses ZCS technique and the function is realized so that the power form is converted from 12V DC 5V DC (1A). A detailed analysis of zero current switching buck converters is performed and a mathematical analysis of the mode of operation is also presented. In order to reduce the switching losses in associated with conventional converters; resonant inductor and resonant capacitor (LC resonant circuit) is applied which helps to turn on-off the switch at zero current. The dc-dc buck converter receives the energy from the input source, when the switch is turned-on. The buck–buck converters have characteristics that warrant a more detailed study. The buck converters under discontinuous conduction mode /continuous conduction mode boundary.
GET IEEE BIG DATA,JAVA ,DOTNET,ANDROID ,NS2,MATLAB,EMBEDED AT LOW COST WITH BEST QUALITY PLEASE CONTACT BELOW NUMBER
FOR MORE INFORMATION PLEASE FIND THE BELOW DETAILS:
Nexgen Technology
No :66,4th cross,Venkata nagar,
Near SBI ATM,
Puducherry.
Email Id: praveen@nexgenproject.com
Mobile: 9791938249
Telephone: 0413-2211159
www.nexgenproject.com
GET IEEE BIG DATA,JAVA ,DOTNET,ANDROID ,NS2,MATLAB,EMBEDED AT LOW COST WITH BEST QUALITY PLEASE CONTACT BELOW NUMBER
FOR MORE INFORMATION PLEASE FIND THE BELOW DETAILS:
Nexgen Technology
No :66,4th cross,Venkata nagar,
Near SBI ATM,
Puducherry.
Email Id: praveen@nexgenproject.com
Mobile: 9791938249
Telephone: 0413-2211159
www.nexgenproject.com
Universal demand for power increases due to continuous development to fulfil all these demand. Resources
are used with optimization. A high efficiency and high power factor converters are the major parts of energy
transfer system. This paper present a general review on single stage forward and flyback converter topologies to get
better its performance. This is paper presents a kind general idea of increasing efficiency and power factor of single
stage forward and fly back converter.
NON-ISOLATED SOFT SWITCHING DC-DC CONVERTER AND LOAD AT FULL RANGE OF ZVS IAEME Publication
A non isolated soft switching DC–DC converter and load at full range of zero-voltage
switching (ZVS) characteristic is proposed. The proposed converter consists of an auxiliary circuit,
an inductor, two switches, and 2 diodes to achieving high efficiency at full range of load. At low
and heavy loads, ZVS of switching device is achieved by energy storing component. The inductor
energy stored varies with load and hence results in minimizes conduction loss. This leads to
switching of device for full range of load. The proposed DC - DC converter achieves high
efficiency as switching loss is reduced due to soft switching and ZVS operation which severe to
reduce conduction loss. The efficiency is improved about 4% in boost mode (2.5% in buck mode) at
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prototype are presented.
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International Journal of Modern Engineering Research (IJMER) is Peer reviewed, online Journal. It serves as an international archival forum of scholarly research related to engineering and science education.
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Solar Based Stand Alone High Performance Interleaved Boost Converter with Zvs and Zcs
1. IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE)
e-ISSN: 2278-1676,p-ISSN: 2320-3331, Volume 5, Issue 4 (May. - Jun. 2013), PP 22-28
www.iosrjournals.org
www.iosrjournals.org 22 | Page
Solar Based Stand Alone High Performance Interleaved Boost
Converter with Zvs and Zcs
Ms.Nicy v.b1
, Mr.V.Karthikeyan2
1
(PG Scholar (EEE),Hindusthan college of Engineering and Technology, Coimbatore)
2
(Asst.professor(EEE),Hindusthan College of Engineering and Technology, Coimbatore)
Abstract: This paper introduces interleaved boost converters topology for PFC (power-factor-corrected),
which has continuous input current that you can manipulate with average-current-mode-control techniques to
force input current to track changes in line voltage. The concept of interleaving, or more generally that of
increasing the effective pulse frequency of any periodic power source by synchronizing several smaller sources
and operating them with relative phase shifts. With the help of the interleaving technology the inductor current
of interleaved boost converter can be reduced and thus inductor size is reduced. The Zero voltage technique
provides perfect turn on process of the converter . There is no overlap between the voltages and current, hence
no switching loss takes place at turn on process. The performance of proposed work is tested and verified by
MATLAB/SIMULINK software.
Keywords - interleaved boost converter, power factor correction (PFC), switching loss, zero-current
switching (ZCS), zero-voltage switching (ZVS).
I. INTRODUCTION
The power factor is defined as the ratio of the average power to the apparent power at an AC terminal.
When a converter has less than unity power factor means that the converter absorbs apparent power higher than
the real power consumes. This implies that the power source should be rated with higher VA ratings than the
load needs. In addition the current harmonics converter produces deteriorate the power source quality, which
affect the other equipment. The solution to improve the power factor is to add a passive filter, which is
composed of a capacitor and an inductor. However this passive filter is inefficient and bulky since it operates at
the line frequency. Therefore, thepower factor correction stage has to be inserted to the existing equipment to
achieve a good power factor. The PFC technique reduces current harmonics in utility systems produced by
nonlinear Load. Interleaved operation (the parallel connection of switching converters) of two or more boost
converters has been proposed to increase the output power and reduce the output ripple current [1]-[7]. This
technique consists of a phase shifting of the control signals of several cells in parallel operating at the same
switching frequency. As a result, the input and output current waveforms exhibit lower ripple amplitude. High-
switching-frequency operation is necessary to achieve small size of the converter. However, the switching loss
will increase as the switching frequency is increased. To solve these problem, soft switching techniques are
necessary. The zero-voltage-switched (ZVS) technique and zero-current-switched (ZCS) technique are two
commonly used soft switching methods. By adopting these ZCS and ZVS techniques, either voltage or current is
zero during switching transitions, which reduces the switching loss and also increases the reliability of the
power supplies. The choice of the soft-switching technique, i.e., ZCS(zero current source) or ZVS, it is taking
into account them technology of the semiconductor device will be used. For example, Power MOSFETSs
present a better performance when these are commutated under ZVS since they exhibit turn-on capacitive losses
when operating in ZCS increasing the switching losses and EMI. On the other, the IGBTs present better results
when are commutated under ZCS which can avoid their lath up and the turn-off losses caused by the tail current.
The ZCS techniques have some drawbacks such as a significant voltage stress on main diode, which increases
the conduction losses, and presence of the resonant inductor in series with the main switch, which increases the
magnetic losses. The technique of zero voltage switching is applicable to all switching topologies ZVS
technique [9]-[11]basically consists of forcing to zero the active switch voltage that prior to its turn-on by
creating a resonance between an inductor and a capacitor. The inductor also limits the rate of variation of the
diode current so losses due to the reverse recovery are reduced as well converter are simple topology, , fast
transient response,high power density and continuous input current. Therefore, the boost converters are usually
used in different power electronics applications such as active PFC, photovoltaic power systems and fuel cells.
Also interleaved operation (the parallel connection of switching converters) of two or more boost converters has
been proposed to increase the output power and to the reduce output ripple. This consists of a phase shifting of
the control signals of several cells in parallel operating at the same switching frequency. As a result, the input
and output current waveforms exhibit lower ripple amplitude.
2. Solar Based Stand Alone High Performance Interleaved Boost Converter With Zvs And Zcs
www.iosrjournals.org 23 | Page
High-switching-frequency operation is necessary to achieve small size of the converter. However, the switching
loss will increase as the switching frequency is increased. To solve these problem, soft switching techniques are
necessary. The zero-voltage-switched (ZVS) technique and zero-current-switched (ZCS) technique are two
commonly used soft switching methods. By adopting in these techniques, either current or voltage is zero during
switching transitions, which reduces the switching loss and also increases the reliability of the power supplies.
The choice of the soft-switching techniques, i.e., ZCS or ZVS, it is taking into account the technology of the
semiconductor device that will be used. For example Power MOSFETSs present a better performance when are
commutated under ZVS, since these exhibit turn-on capacitive losses when operating in ZCS increasing the
switching losses and EMI. On the other, the IGBTs present better results when are commutated under ZCS
which can avoid their lath up and the turn-off losses caused by the tail current. The ZCS techniques have some
drawbacks such as, a significant voltage stress on the main diode, which increases the conduction losses, in the
presence of the resonant inductor series with the main switch, which increases the magnetic losses. The
technique of zero voltage switching is applicable to all switching topologies. ZVS technique basically forcing to
zero the active switch voltage that prior to turn-on by creating a resonance between an inductor and a capacitor.
The inductor also limits the rate of variation of the diode current so losses due to the reverse recovery are
reduced as well.
II. Interleaved Boost Converter
Interleaved boost converter composed of two shunted elementary boost conversion units and an
auxiliary inductor. Power for the interleaved boost converter can come from any suitable DC sources, such as
batteries, solar panels,DC generators and rectifiers. A process that changes one DC voltage to a different DC
voltage is called DC to DC conversion. The basic principle of a Boost converter consists of 2 distinct states in
the On-state, switch S is closed, resulting in an increase the inductor current; in the Off-state, switch is open and
the only path offered to inductor current is through the diode D, the capacitor C and load R. These results
transferring the energy accumulated during the On-state into the capacitor. In the interleaved boost converters
cascading two boost converters, so inductor is split in two then huge amount current can be stored.
Fig1: Block diagram
So the accuracy of the system can be increased. This converter is able to turn on both the active power
switches at zero voltage to reduce their switching losses and raise the conversion efficiency. Since two parallel-
operated elementary boost units are identical, operation analysis and design the converter module becomes quite
simple. The benefits of interleaving include high power capability, reliability, and improved modularity.
Power for the interleaved boost converter acquired from the solar panel. Solar panels use light energy
(photons) from the sun to generate electricity through the photovoltaic effect. Here the operation of two phase
interleaved boost converter is explained which is shown in the figure 2. Firstly when the device S1 is turned ON,
the current in the inductor iL1 increases linearly.
3. Solar Based Stand Alone High Performance Interleaved Boost Converter With Zvs And Zcs
www.iosrjournals.org 24 | Page
Fig2: Interleaved boost converter
During this period energy is stored in the inductor L1. When S1 is turned OFF, diode D1 conducts
and the stored energy in the inductor ramps down with a slope based on the difference between the input and
output voltage. The inductor starts to discharge and transfer the current via the diode to the load. After a half
switching cycle of S1, S2 is also turned ON completing the same cycle of events. Since both the power channels
are combined at the output capacitor and the effective ripple frequency is twice than that of a single-phase boost
converter. The amplitude of the input current ripple is small. This advantage makes this topology very attractive
for the renewable sources of energy. The gating pulses of the two devices are shifted by a phase difference of
360/n, where n is the number of parallel boost converters connected in parallel. For a two-phase interleaved
boost converter n=2, which is 180 degrees. By splitting the current into two power paths, conduction (I2
R)
losses can be reduced, and increasing overall efficiency compared to a single-phase converter. Because the two
phases are combined at the output capacitor, effective ripple frequency is doubled, that making ripple voltage
reduction much easier. Likewise, the power pulses drawn from the input capacitor are staggered, reducing the
ripple current requirements. In the figure 1 it can be seen that the input current, i, for two phase interleaved
boost converter is the sum of each channels inductors currents. As the two devices are phase shifted by 180
degrees, the input current ripple produced is the smallest.
2.1 Boost Ratio:
The boosting ratio of the converter is a function of the duty ratio. It is same as in conventional boost
converter. It is defined as
(1)
Where the output voltage is is the input voltage and D is the duty ratio.
The result of interleaved boost converter given to the inverter and invert the output which is given to
the induction motor. An induction motor, it’s a type of AC motor where power is supplied to the rotor by
means of electromagnetic induction. The speed of the induction motor is controlled by the frequency of the
supply voltage. When driven a fixed line frequency, the motor reduces the speed of rotation. When used in this
way, the induction motors are usually run so that in operation the shaft rotation speed is kept above the peak
torque point.
ZVS technique basically forcing to zero the a switch voltage prior to its turn-on by creating a resonance
between an inductor and a capacitor. The inductor also limits the rate of variation of the diode current so losses
due to the reverse recovery are reduced as well.
III. Design Challenges Of Interleaved Boost Converter
The operation of two phase interleaved boost converter is explained which is shown in the figure 2.
Firstly when the device S1 is turned ON, the current in the inductor iL1 increases linearly. During this period
energy is stored in the inductor L1. When S1 is turned OFF, diode D1 conducts and the stored energy in the
inductor ramps down with a slope based on the difference between the input and output voltage. The inductor
starts to discharge and transfer the current via the diode to the load. After a half switching cycle of S1, S2 is also
turned ON completing the same cycle of events. Since both the power channels are combined at the output
capacitor the effective ripple frequency is twice than that of a single-phase boost converter. The amplitude of the
input current ripple is small. This advantage makes this topology very attractive for the renewable sources of
energy. The gating pulses of the two devices are shifted by a phase difference of 360/n, where n is the number of
4. Solar Based Stand Alone High Performance Interleaved Boost Converter With Zvs And Zcs
www.iosrjournals.org 25 | Page
parallel boost converters connected in parallel. For a two-phase interleaved boost converter n=2, which is 180
degrees. By splitting the current into two power paths, conduction (I2
R) losses can be reduced, increasing the
overall efficiency compared to a single-phase converter. Because the two phases are combined at the output
capacitor, effective ripple frequency is doubled that making ripple voltage reduction much easier. Likewise, the
power pulses drawn from the input capacitor are staggered, reducing the ripple current requirements.
In the figure 2 it can be seen that the input current, I, for two phase interleaved boost converter is the
sum of each channels inductors currents. As the two devices are phase shifted by 180 degrees, the input current
ripple produced is the smallest.
An induction or asynchronous motor is a type of AC motor where power is supplied to the rotor by
means of electromagnetic induction. The speed of the induction motor is controlled by the frequency of the
supply voltage. When driven a fixed line frequency, the motor reduces the rotation speed. When used in this
way, the induction motors are usually run so that in operation the shaft rotation speed is kept above the peak
torque point.
(2)
Where is the input power and is the voltage.
(3)
L= (4)
Where Vs represent the source voltage IL represent the inductor current and Fs Is the switching frequency
(5)
IV. Simulation Model
Fig3:Simulation model
Two Boost converters working on same switching frequency are connected in parallel supplied
from the same rectified dc from ac supply mains and feeding a load. Two boost converters are connected in
parallel with same control technique used as earlier in single boost PFC circuit switches working with same
switching frequency and different duty cycles (phase shifting of switch conduction).As parallel connection is
used, smoothening of line current will occur and because of PFC circuit line current harmonics will reduce.
5. Solar Based Stand Alone High Performance Interleaved Boost Converter With Zvs And Zcs
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V. RESULTS AND DISCUSSION
Fig.4 shows the P-V curves obtained at the two temperatures. The circular markers in the graphs
represent experimental (V, I) and (V, P) points extracted from the datasheet. Fig.4 proves that the model
accurately matches with the experimental data both in the current and power curves as expected.
X axis-Time, Y axis-Voltage
Fig 4: PV model output
Fig 5: Interleaved Boost Converter diagram
X axis-Time
Y axis-Voltage
Fig 6: Interleaved boost converter output
This is the interleaved boost converter output. in This x-axis shown the voltage and y-axis shown the
time at 450 voltage its constant. The following equations and the graph of Figure show how the ratio of output-
capacitor ripple current and the change in inductor current vary with duty cycle. Figure illustrates that the
maximum inductor ripple current cancellation occurs at 50% duty cycle.
X axis-Time
Y axis-Voltage
Fig 7: Induction motor output
6. Solar Based Stand Alone High Performance Interleaved Boost Converter With Zvs And Zcs
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X axis-Time
Y axis-Voltage
Fig.8: PWM output for IGBT2
This is the PWM output for interleaved boost converter switches. The process of PWM
conversion is non-linear and it is generally supposed that low pass filter signal recovery is imperfect for PWM.
The PWM sampling theorem shows the PWM conversion can be perfect. The theorem states that any band
limited baseband signal within ±0.637 can be represented by a pulse width modulation (PWM) waveform with
unit amplitude. The number of pulses in this waveform is equal to the number of Nyquist samples and the peak
constraint is independent of whether the waveform is two-level or three-level.
VI. Conclusion
In this paper, a new interleaved boost PFC converter is proposed, which provides switching for the
power MOSFETs, through a circuit. This circuit provides reactive current during the transition times of the
MOSFETs [13]-[17] to charge and discharge the output capacitors of the MOSFETs. In addition, the control
system effectively optimizes the amount of reactive current required to achieve ZVS for the power MOSFETs.
The frequency loop, which is introduced in the control system, determines the frequency of the modulator based
on the load condition and the duty cycle of the converter. The experimental results and efficiency curves show
the superior performance of the proposed converter compared to the conventional one. The power factor
correction circuits were employed with PI controller to optimize the performance. So with this effect, the
converter module performs very well with the power factor as high as 0.93.
Acknowledgement
Authors would like to thank all the researchers who have contributed in this field of research. The comments
of anonymous reviewers to improve the quality of this paper are also acknowledged.
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