Implementation of Full-Bridge Single-Stage Converter with Reduced Auxiliary C...IJERA Editor
The inclusion of a few additional diodes and passive elements in the high-frequency full-bridge ac–dc converter with galvanic isolation permits one to achieve sinusoidal input-current wave shaping and output-voltage regulation simultaneously without adding any auxiliary transistors. Recently, this procedure, together with an appropriate control process, has been used to obtain low-cost high-efficiency single-stage converters. In an attempt to improve the performance of such converters, this paper introduces three new single-stage full-bridge ac–dc topologies with some optimized characteristics and compares them with the ones of the existing full-bridge single-stage topologies. The approach used consists in the definition of the operating principles identifying the boost function for each topology, their operating limits, and the dependence between the two involved conversion processes. Experimental results for each topology were obtained in 500-W modular voltage disturbances that result from the input-current wave-shaping process.
A Three Level Single Stage PFC Converter for Variable Power Applicationspaperpublications3
Abstract: AC/DC power converters are required to operate with high power factor (PF) and low total harmonic distortion (THD) for improved grid quality and full capacity utilization of the transmission lines. Passive PF correction (PFC) circuits consist of inductive and capacitive filters followed by a diode bridge. They provide the simplest way of achieving high PF with high efficiency; however, they require low line frequency filters which are bulky and heavy. This work presents a new single stage three level isolated AC/DC PFC converter for high DC link voltage low-power applications achieved through an effective integration of AC/DC and DC/DC stages where all of the switches are shared between two operations. With the converter and switching scheme, input current shaping and output voltage regulation can be achieved simultaneously without introducing additional switches or switching actions. Due to the flexible DC link voltage structure, high power factor can be achieved at high line voltage. The performance of the single stage PFC converter is simulated in MATLAB/SIMULINK environment.
Keywords: Power Factor (PF), DC Link Voltage, Power Factor Correction Circuits (PFC).
Title: A Three Level Single Stage PFC Converter for Variable Power Applications
Author: Litty Joseph, Prof. Neetha John, Prof. Emmanuel Babu P
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
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.
A three-phase bidirectional isolated dc-dc converter consists of two six-pulse two-level active converters that enable bidirectional power flow by introducing a lag phase-shift angle of one converter with respect to the other converter. This paper explains the operating modes of a three-phase bidirectional isolated dc-dc converter in detail, taking into account the transfer of energy between the dc voltage sources and high-frequency ac inductances in the three-phase bidirectional isolated dc-dc converter. The power flow of the dc-dc converter is also examined based on the operating modes.
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.
Implementation of Full-Bridge Single-Stage Converter with Reduced Auxiliary C...IJERA Editor
The inclusion of a few additional diodes and passive elements in the high-frequency full-bridge ac–dc converter with galvanic isolation permits one to achieve sinusoidal input-current wave shaping and output-voltage regulation simultaneously without adding any auxiliary transistors. Recently, this procedure, together with an appropriate control process, has been used to obtain low-cost high-efficiency single-stage converters. In an attempt to improve the performance of such converters, this paper introduces three new single-stage full-bridge ac–dc topologies with some optimized characteristics and compares them with the ones of the existing full-bridge single-stage topologies. The approach used consists in the definition of the operating principles identifying the boost function for each topology, their operating limits, and the dependence between the two involved conversion processes. Experimental results for each topology were obtained in 500-W modular voltage disturbances that result from the input-current wave-shaping process.
A Three Level Single Stage PFC Converter for Variable Power Applicationspaperpublications3
Abstract: AC/DC power converters are required to operate with high power factor (PF) and low total harmonic distortion (THD) for improved grid quality and full capacity utilization of the transmission lines. Passive PF correction (PFC) circuits consist of inductive and capacitive filters followed by a diode bridge. They provide the simplest way of achieving high PF with high efficiency; however, they require low line frequency filters which are bulky and heavy. This work presents a new single stage three level isolated AC/DC PFC converter for high DC link voltage low-power applications achieved through an effective integration of AC/DC and DC/DC stages where all of the switches are shared between two operations. With the converter and switching scheme, input current shaping and output voltage regulation can be achieved simultaneously without introducing additional switches or switching actions. Due to the flexible DC link voltage structure, high power factor can be achieved at high line voltage. The performance of the single stage PFC converter is simulated in MATLAB/SIMULINK environment.
Keywords: Power Factor (PF), DC Link Voltage, Power Factor Correction Circuits (PFC).
Title: A Three Level Single Stage PFC Converter for Variable Power Applications
Author: Litty Joseph, Prof. Neetha John, Prof. Emmanuel Babu P
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
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.
A three-phase bidirectional isolated dc-dc converter consists of two six-pulse two-level active converters that enable bidirectional power flow by introducing a lag phase-shift angle of one converter with respect to the other converter. This paper explains the operating modes of a three-phase bidirectional isolated dc-dc converter in detail, taking into account the transfer of energy between the dc voltage sources and high-frequency ac inductances in the three-phase bidirectional isolated dc-dc converter. The power flow of the dc-dc converter is also examined based on the operating modes.
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.
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.
A Novel Approach of Position Estimation and Power Factor Corrector Converter ...IJPEDS-IAES
This paper proposes a Power factor Corrected (PFC) Bridgeless Buck-Boost converter fed BLDC motor drive. The Bridgeless configuration eliminates the Diode Bridge Rectifier in order to reduce the number of components and the conduction loss. The position sensors used in BLDC drives have drawbacks of additional cost, mechanical alignment problems. These bottle necks results in sensorless technique. The Sensorless technique mostly relies on measurement of Back EMF to determine relative positions of stator and rotor for the correct coil energising sequence can be implemented. This paper introduces the offline Finite Element method for sensorless operation. The proposed sensorless scheme estimates the motor position at standstill and running condition. The obtained Power Factor is within the acceptable limits IEC 61000-3-2. The proposed drive is simulated in MATLAB/Simulink the obtained results are validated experimentally on a developed prototype of the drive.
This paper proposed a new sparce matrix converter with Z-source network to provide unity voltage transfer ratio. It is an ac-to-ac converter with diode-IGBT bidirectional switches. The limitations of existing matrix converter like higher current THD and less voltage transfer ratio issues are overcome by this proposed matrix converter by inserting a Z-source. Due to this Z-source current harmonics are totally removed. The simulation is performed for different frequencies. The simulation results are presented to verify the THD and voltage transfer ratio and compared with the existing virtual AC/DC/AC matrix converter. The experimental output voltage amplitude can be varied with the variable frequencies.
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.
Review of Integrated Power Factor Correction (PFC) Boost converter topologies...IJARBEST JOURNAL
This paper provides a review of various Power Factor Correction (PFC) boost
converter topologies suitable for telecoms. A novel integrated PFC topology is proposed which acts
as a backup power supply for telecommunication systems. The advantage of the proposed circuit is
that it operates based on soft switching principle thereby reducing the switching losses in the
converter. The topologies analyzed in this paper are conventional average current mode control
boost PFC, bridgeless boost PFC, semi-bridgeless boost PFC, totem-pole bridgeless boost PFC and
proposed integrated boost PFC. All these topology studies are investigated by carrying out the
simulation of the converter circuits using PSIM software. A detailed comparison of all the
topologies have been done and they are compared in terms of supply power factor, supply current
THD and displacement factor. From the results, it is inferred that the proposed integrated PFC
provides a reduced supply current THD and improved power factor. The results are validated.
Two port network parameters, Z, Y, ABCD, h and g parameters, Characteristic impedance,
Image transfer constant, image and iterative impedance, network function, driving point and
transfer functions – using transformed (S) variables, Poles and Zeros.
Three Phase Single Stage Isolated Cuk based PFC ConverterAsoka Technologies
In this paper, analysis and design of a three phase isolated Cuk based power factor correction (PFC) converter has been proposed. The proposed converter is operated in discontinuous output inductor current mode (DOICM) to achieve PFC at ac input. This avoids the inner current control loop which further eliminates the sensing of current. This makes the system more reliable and robust. The converter requires only one simple voltage control loop for output voltage regulation and all the power switches are driven by the same gate signal which simplifies the gate driver circuit. The detailed operation of the converter and design calculations are presented. And also a small signal model of the converter by using CIECE approach is presented to aid the controller design. The experimental results from a 2-kW laboratory prototype with 208-V line-to-line input voltage, 400-V output voltage are presented to confirm the operation of the proposed converter. An input power factor of 0.999, an input current total harmonic distortion of as low as 4.06% and a high conversion efficiency of 95.1% are achieved from laboratory prototype.
International Journal of Engineering Research and Development (IJERD)IJERD Editor
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 three level quasi-two-stage single-phase pfc converter with flexible output...LeMeniz Infotech
A three level quasi-two-stage single-phase pfc converter with flexible output voltage and improved conversion efficiency
To Get this projects Call : 9566355386 / 99625 88976
Visit : www.lemenizinfotech.com / www.ieeemaster.com
Mail : projects@lemenizinfotech.com
Now day’s the power factor has become a major problem in power system to improve the power quality of the grid, as power factor is affected on the grid due to the nonlinear loads connected to it. Single phase bridgeless AC/DC power factor correction (PFC) topology to improve the power factor as well as the total harmonic distortion (THD) of the utility grid is proposed. By removing the input bridge in conventional PFC converters, the control circuit is simplified; the total harmonics distortion (THD) and power factor (PF) are improved. The PI controller operates in two loops one is the outer control loop which calculates the reference current through LC filter and signal processing. Inner current loop generates PWM switching signals through the PI controller. The output of the proposed PFC topology is verified for prototype using MATLAB circuit simulations. The experimental system is developed, and the simulation results are obtained.
Soft Computing Technique for the Control of Triple-Lift Luo ConverterIJERA Editor
Positive output Luo converters are a series of new DC-DC step-up (boost) converters, which were developed from prototypes using voltage lift technique. These converters perform positive to positive DC-DC voltage increasing conversion with high power density, high efficiency and cheap topology in simple structure. They are different from other existing DC-DC step-up converters with a high output voltage and small ripples. Triple lift LUO circuit is derived from positive output elementary Luo converter by adding the lift circuit three times. Due to the time varying and switching nature of the Luo converters, their dynamic behaviour becomes highly nonlinear. The classical control methods employed to design the controllers for Luo converters depend on the operating point so that it is very difficult to select control parameters because of the presence of parasitic elements, time varying loads and variable supply voltages. Conventional controllers require a good knowledge of the system and accurate tuning in order to obtain the desired performances. A fuzzy logic controller is a soft computing technique which neither requires a precise mathematical model of the system nor complex computations. The performances of the Triple-lift Luo converter with fuzzy logic controller are evaluated under line and load disturbances using Matlab-Simulink based simulation. The results are presented and analyzed.
Comprehensive Study of Single-Phase AC-DC Power Factor Corrected Converters w...Asoka Technologies
Solid-state switch mode AC-DC converters having high-frequency transformer isolation are developed in buck, boost, and buck-boost configurations with improved power quality in terms of reduced total harmonic distortion (THD) of input current, power-factor correction (PFC) at AC mains and precisely regulated and isolated DC output voltage feeding to loads from few Watts to several kW. This paper presents a comprehensive study on state of art of power factor corrected single-phase AC-DC converters configurations, control strategies, selection of components and design considerations, performance evaluation, power quality considerations, selection criteria and potential applications, latest trends, and future developments. Simulation results as well as comparative performance are presented and discussed for most of the proposed topologies.
AN ACTIVE PFC WITH FLYBACK DESIGN FOR INTELLIGENCE IN STREET LIGHT APPLICATIONJournal For Research
As the requirement of energy demand is increasing due to rapid industrial development, it is necessary to meet the growing demand of energy. This can be achieved in two ways: find alternate resource to supply power or energy; or reduce the energy consumption of present resources available. The proposed work is basically the design and implementation of an intelligent street light of 50 W power output from the offline converter by using power LED. As power LED draws huge non sinusoidal current due to the presence of AC-DC converter, a Boost PFC and a fly back converter is used for better power factor and for dc voltage regulation. Along with this a PIR sensor and LDR sensors are also used. A PIC microcontroller is used for PWM dimming. This makes to reduce the power consumption in street light especially in urban cities in which most of the power is wasted in lighting streets during late night.
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.
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.
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.
A Novel Approach of Position Estimation and Power Factor Corrector Converter ...IJPEDS-IAES
This paper proposes a Power factor Corrected (PFC) Bridgeless Buck-Boost converter fed BLDC motor drive. The Bridgeless configuration eliminates the Diode Bridge Rectifier in order to reduce the number of components and the conduction loss. The position sensors used in BLDC drives have drawbacks of additional cost, mechanical alignment problems. These bottle necks results in sensorless technique. The Sensorless technique mostly relies on measurement of Back EMF to determine relative positions of stator and rotor for the correct coil energising sequence can be implemented. This paper introduces the offline Finite Element method for sensorless operation. The proposed sensorless scheme estimates the motor position at standstill and running condition. The obtained Power Factor is within the acceptable limits IEC 61000-3-2. The proposed drive is simulated in MATLAB/Simulink the obtained results are validated experimentally on a developed prototype of the drive.
This paper proposed a new sparce matrix converter with Z-source network to provide unity voltage transfer ratio. It is an ac-to-ac converter with diode-IGBT bidirectional switches. The limitations of existing matrix converter like higher current THD and less voltage transfer ratio issues are overcome by this proposed matrix converter by inserting a Z-source. Due to this Z-source current harmonics are totally removed. The simulation is performed for different frequencies. The simulation results are presented to verify the THD and voltage transfer ratio and compared with the existing virtual AC/DC/AC matrix converter. The experimental output voltage amplitude can be varied with the variable frequencies.
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.
Review of Integrated Power Factor Correction (PFC) Boost converter topologies...IJARBEST JOURNAL
This paper provides a review of various Power Factor Correction (PFC) boost
converter topologies suitable for telecoms. A novel integrated PFC topology is proposed which acts
as a backup power supply for telecommunication systems. The advantage of the proposed circuit is
that it operates based on soft switching principle thereby reducing the switching losses in the
converter. The topologies analyzed in this paper are conventional average current mode control
boost PFC, bridgeless boost PFC, semi-bridgeless boost PFC, totem-pole bridgeless boost PFC and
proposed integrated boost PFC. All these topology studies are investigated by carrying out the
simulation of the converter circuits using PSIM software. A detailed comparison of all the
topologies have been done and they are compared in terms of supply power factor, supply current
THD and displacement factor. From the results, it is inferred that the proposed integrated PFC
provides a reduced supply current THD and improved power factor. The results are validated.
Two port network parameters, Z, Y, ABCD, h and g parameters, Characteristic impedance,
Image transfer constant, image and iterative impedance, network function, driving point and
transfer functions – using transformed (S) variables, Poles and Zeros.
Three Phase Single Stage Isolated Cuk based PFC ConverterAsoka Technologies
In this paper, analysis and design of a three phase isolated Cuk based power factor correction (PFC) converter has been proposed. The proposed converter is operated in discontinuous output inductor current mode (DOICM) to achieve PFC at ac input. This avoids the inner current control loop which further eliminates the sensing of current. This makes the system more reliable and robust. The converter requires only one simple voltage control loop for output voltage regulation and all the power switches are driven by the same gate signal which simplifies the gate driver circuit. The detailed operation of the converter and design calculations are presented. And also a small signal model of the converter by using CIECE approach is presented to aid the controller design. The experimental results from a 2-kW laboratory prototype with 208-V line-to-line input voltage, 400-V output voltage are presented to confirm the operation of the proposed converter. An input power factor of 0.999, an input current total harmonic distortion of as low as 4.06% and a high conversion efficiency of 95.1% are achieved from laboratory prototype.
International Journal of Engineering Research and Development (IJERD)IJERD Editor
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 three level quasi-two-stage single-phase pfc converter with flexible output...LeMeniz Infotech
A three level quasi-two-stage single-phase pfc converter with flexible output voltage and improved conversion efficiency
To Get this projects Call : 9566355386 / 99625 88976
Visit : www.lemenizinfotech.com / www.ieeemaster.com
Mail : projects@lemenizinfotech.com
Now day’s the power factor has become a major problem in power system to improve the power quality of the grid, as power factor is affected on the grid due to the nonlinear loads connected to it. Single phase bridgeless AC/DC power factor correction (PFC) topology to improve the power factor as well as the total harmonic distortion (THD) of the utility grid is proposed. By removing the input bridge in conventional PFC converters, the control circuit is simplified; the total harmonics distortion (THD) and power factor (PF) are improved. The PI controller operates in two loops one is the outer control loop which calculates the reference current through LC filter and signal processing. Inner current loop generates PWM switching signals through the PI controller. The output of the proposed PFC topology is verified for prototype using MATLAB circuit simulations. The experimental system is developed, and the simulation results are obtained.
Soft Computing Technique for the Control of Triple-Lift Luo ConverterIJERA Editor
Positive output Luo converters are a series of new DC-DC step-up (boost) converters, which were developed from prototypes using voltage lift technique. These converters perform positive to positive DC-DC voltage increasing conversion with high power density, high efficiency and cheap topology in simple structure. They are different from other existing DC-DC step-up converters with a high output voltage and small ripples. Triple lift LUO circuit is derived from positive output elementary Luo converter by adding the lift circuit three times. Due to the time varying and switching nature of the Luo converters, their dynamic behaviour becomes highly nonlinear. The classical control methods employed to design the controllers for Luo converters depend on the operating point so that it is very difficult to select control parameters because of the presence of parasitic elements, time varying loads and variable supply voltages. Conventional controllers require a good knowledge of the system and accurate tuning in order to obtain the desired performances. A fuzzy logic controller is a soft computing technique which neither requires a precise mathematical model of the system nor complex computations. The performances of the Triple-lift Luo converter with fuzzy logic controller are evaluated under line and load disturbances using Matlab-Simulink based simulation. The results are presented and analyzed.
Comprehensive Study of Single-Phase AC-DC Power Factor Corrected Converters w...Asoka Technologies
Solid-state switch mode AC-DC converters having high-frequency transformer isolation are developed in buck, boost, and buck-boost configurations with improved power quality in terms of reduced total harmonic distortion (THD) of input current, power-factor correction (PFC) at AC mains and precisely regulated and isolated DC output voltage feeding to loads from few Watts to several kW. This paper presents a comprehensive study on state of art of power factor corrected single-phase AC-DC converters configurations, control strategies, selection of components and design considerations, performance evaluation, power quality considerations, selection criteria and potential applications, latest trends, and future developments. Simulation results as well as comparative performance are presented and discussed for most of the proposed topologies.
AN ACTIVE PFC WITH FLYBACK DESIGN FOR INTELLIGENCE IN STREET LIGHT APPLICATIONJournal For Research
As the requirement of energy demand is increasing due to rapid industrial development, it is necessary to meet the growing demand of energy. This can be achieved in two ways: find alternate resource to supply power or energy; or reduce the energy consumption of present resources available. The proposed work is basically the design and implementation of an intelligent street light of 50 W power output from the offline converter by using power LED. As power LED draws huge non sinusoidal current due to the presence of AC-DC converter, a Boost PFC and a fly back converter is used for better power factor and for dc voltage regulation. Along with this a PIR sensor and LDR sensors are also used. A PIC microcontroller is used for PWM dimming. This makes to reduce the power consumption in street light especially in urban cities in which most of the power is wasted in lighting streets during late night.
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.
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.
Design and implementation of Closed Loop Control of Three Phase Interleaved P...IJMTST Journal
A single-phase, three-level, single-stage power-factor corrected AC/DC converter operated under closed
loop manner is presented. That operates with a single controller to regulate the output voltage and the input
inductor act as a boost inductor to have a single stage power factor correction with good output response. The
paper deals with a new single stage three level ac-dc converter which performs both power factor correction
and voltage regulation in a single stage. The proposed converter has two separate controllers, one for power
factor correction and the other for regulating the output voltage. A comprehensive review of the existing single
stage topologies has been carried out. Then the operating principle, control scheme and the design of the new
converter are presented. The proposed converter is having an input power factor close to unity and better
voltage regulation compared to the conventional ac-dc converter topologies. Proposed topology is evaluated
through Matlab/Simulink platform and simulation results are conferred.
International Journal of Engineering Research and Applications (IJERA) aims to cover the latest outstanding developments in the field of all Engineering Technologies & science.
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To overcome the problem of mismatched voltage levels between parallel-connected low voltage photovoltaic (PV)
arrays and the higher grid voltage, a hybrid boost three level dc-dc converter is developed based on three level inverter with
the traditional single phase diode clamping. Only one inductor, two capacitors in series, and those power switches and diodes,
which are easy to be integrated, are used for establish the topology with transformerless high voltage gain. The operation
principle of the topology is analyzed, and then the pulse width modulation (PWM) control method is obtained according to
the switching functions about the output pulse voltages of both half-bridges. Therefore, the converter can not only operate
with high voltage gain, but also make the duty cycles of power switches closer to 0.5. A feedforward closed loop control
operation is proposed such that even in varying input the converter is capable of giving a constant output. Finally an
experimental is set up in the laboratory for open loop control operation. All experimental results verify the feasibility of the
circuit and validity of the PWM control method.
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.
International Journal of Engineering Research and Development (IJERD)IJERD Editor
International Journal of Engineering Research and Development is an international premier peer reviewed open access engineering and technology journal promoting the discovery, innovation, advancement and dissemination of basic and transitional knowledge in engineering, technology and related disciplines.
This study presents a new two-switch multi-input high step-up DC/DC converter. A coupled inductor is used to enhance the voltage gain. Having a bidirectional port makes the converter suitable for applications in need of battery such as stand-alone photovoltaic (PV) systems. As a result, the proposed converter has the merits of integrating two power sources along with boosting the input voltage. Furthermore, in comparison with typical three-port DC/DC converters which utilize three switches, the presented converter employ only two switches to control the converter. Hence, cost and size of the structure is reduced. In order to verify the performance of the converter, simulation results are taken and depicted.
Transformer Less Voltage Quadrupler Based DC-DC Converter with Coupled Induct...IJPEDS-IAES
In this paper a voltage quadrupler dc-dc converter with coupled inductor
and π filter is presented. The use of the coupled inductor reduces the high
leakage inductance which is present in a transformer enabled converter.
The output ripples in the converter is reduced by providing a π filter.
The interleaved voltage quadrupler is used in this system in order to boost the
output voltage. The voltage multiplier improves the output voltage gain.
The main advantage of this system is more voltage gain when compared with
the transformer eneabled circuit and the overall efficiency of the system is
improved. The circuit is simple to control. As a final point of this research,
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demonstrate the effectiveness of this proposed converter.
Single-Input Double Output High Efficient Boost Dc–Dc ConverterIJMER
The aim of this project is to develop a high-efficiency single-input multiple-output (SIMO) dc–dc converter. The proposed converter can boost the voltage of a low-voltage input power source to a controllable high-voltage dc bus and middle-voltage output terminals. The high-voltage dc bus can take as the main power for a high-voltage dc load or the front terminal of a dc–ac inverter.Moreover, middle-voltage output terminals can supply powers for individual middle-voltage dc loads or for charging auxiliary power sources (e.g., battery modules). In this project, a coupled-inductor based dc–dc converter scheme utilizes only one power switch with the properties of voltage clamping and soft switching, and the corresponding device specifications are adequately designed. As a result, the objectives of high-efficiency power conversion, high step up ratio, and various output voltages with different levels can be obtained
The International Journal of Engineering and Science (The IJES)theijes
The International Journal of Engineering & Science is aimed at providing a platform for researchers, engineers, scientists, or educators to publish their original research results, to exchange new ideas, to disseminate information in innovative designs, engineering experiences and technological skills. It is also the Journal's objective to promote engineering and technology education. All papers submitted to the Journal will be blind peer-reviewed. Only original articles will be published.
A Single-Stage High-Frequency Isolated Secondary- Side Controlled AC-DC Conve...IDES Editor
This paper presents a new single-stage highfrequency
isolated ac-dc converter that uses a simple control
circuit. It is well suitable for wide input variation power
sources. The circuit configuration combines a diode rectifier,
boost converter and half-bridge dc-dc resonant converter. A
high power factor is achieved by discontinuous current mode
(DCM) operation of the front-end integrated power factor
correction circuit. The output voltage is regulated by fixedfrequency,
secondary-side phase-shift active rectifier. Softswitching
operation is achieved for all the switches. This
converter operates in three modes, which is classified
according to conduction of different switches and diodes. The
intervals of operation and steady-state analysis are presented
in detail. Design example of a 100 W proposed converter is
given together with its simulation and experiment results for
wide variation in input voltage.
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A New Single-Stage Multilevel Type Full-Bridge Converter Applied to closed loop condition
1. IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE)
e-ISSN: 2278-1676,p-ISSN: 2320-3331, Volume 8, Issue 5 (Nov. - Dec. 2013), PP 24-33
www.iosrjournals.org
www.iosrjournals.org 24 | Page
A New Single-Stage Multilevel Type Full-Bridge Converter
Applied to closed loop condition
K Vamshi Krishna Varma*1
, Vemana Arun Sai*2
,
Mohammed Wajidunnisa*3
, Nasina Jyothirmayi*4
, S.Sridhar*5
Asst professor in EEE department, Training & placement officer in Geethanjali Institute of Science &
Technology Gangavaram (Nellore Dist) A.P, India
Department of Electronics and commmunication Engineering, Geethanjali Institute of Science &
TechnologyGangavaram(Nellore Dist) A.P, India.
Department of Electronics and commmunication Engineering, Geethanjali Institute of Science &
TechnologyGangavaram(Nellore Dist) A.P, India.
Department of Electronics and commmunication Engineering, Geethanjali Institute of Science &
TechnologyGangavaram(Nellore Dist) A.P, India.
Assoc professor in EEE department, H.O.D Of EEE in Geethanjali Institute of Science & Technology
Gangavaram (Nellore Dist) A.P, India
Abstract: Switch Mode rectifiers for power-factor correction have gained considerable attention, due to the
increasing demand for improved power quality. A new three-phase single-stage rectifier with Brushless DC
motor is proposed in this paper. Each converter operates in the continuous conduction mode (CCM), which
allows a high power factor and a small EMI filter. The outstanding features of the proposed rectifier are that it
can produce input currents that do not have dead band regions and an output current that can be continuous
when the converter is operating from maximum load to at least half of the load. Here we proposed full bridge
converter with machine load condition system is validated through MATLAB/SIMULINK Platform.
Keywords: AC–DC power conversion, single-stage power factor correction (SSPFC), three-level converters,
DC motor, Brushless DC motor.
I. INTRODUCTION
Electric Power quality is a term which has captured increasing attention in power engineering in the
recent years, The measure of power quality depends upon the needs of the equipment that is being supplied. The
low power factor and high pulsating current from the AC mains are the main disadvantages of the diode rectifier
and phase controlled rectifier. A three phase ac-dc power conversion with input power factor correction (PFC)
and transformer isolation is typically done using a six-switch front-end ac-dc converter to do the PFC and a
four-switch full-bridge converter to do the dc-dc conversion [1].
This approach, however, is expensive and complicated as it needs ten active switches along with
associated gate drive and control circuitry. Moreover, the converter must be operated with sophisticated control
methods that require the sensing of certain key parameters such as the input currents and voltages; this is
particularly true if online pulse width modulation (PWM) techniques are used. Researchers have tried to reduce
the cost and complexity of the standard converter by modifying the ac-dc front end converters. Proposed
alternatives have included: 1) using three separate ac-dc boost converter modules [2]; 2) using a reduced switch
ac-dc converter [3]; and 3) using a single-switch boost converter [4]. Two separate switch-mode converters are
still needed, however, to perform three-phase ac-dc power conversion with transformer isolation. Researchers
have tried to further reduce the cost and complexity associated with single-phase and three-phase ac-dc power
conversion and PFC by proposing single-stage converters that integrate the functions of PFC and isolated dc-dc
conversion in a single power converter. Previously proposed three-phase single-stage ac-dc converters as shown
in Fig.1, however, have at least one of the following drawbacks that have limited their widespread use.
1) They are implemented with three separate ac-dc single stage modules.
2) Converter components are exposed to very dc bus high voltages so that switches and bulk capacitors with
very high voltage ratings are required.
3) Input currents are distorted and contain a significant amount of low-frequency harmonics because the
converter has difficulty performing PFC and dc-dc conversion simultaneously.
4) Converter must be controlled using very sophisticated techniques and/or nonstandard techniques. This is
particularly of resonant type converter that need variable switching frequency control methods to operate.
5) Output inductor must be very low, which makes the output current to be discontinuous. This results in a very
high output ripple so that secondary diodes with high peak current ratings and large output capacitors to filter
the ripple are needed. This paper presents a new three-phase, single-stage rectifier that does not have any of
2. A New Single-Stage Multilevel Type Full-Bridge Converter Applied to closed loop condition
www.iosrjournals.org 25 | Page
these drawbacks. In this paper, the operation of the new converter is explained, its features and design are
discussed in results, and converter is applied to drive to check the performance of drive.
Fig.1 Previous proposed AC/DC Single Stage Converter
Fig.2 Newly Proposed AC/DC Single Stage Converter
II. CONVERTER OPERATING PRINCIPLE
The proposed converter and its key waveforms are shown in Figs. 2 and 3. The basic principle behind
the proposed converter is that it used auxiliary windings that are taken from the converter transformer to cancel
the dc bus capacitor voltage so that the voltage that appears across the diode bridge output is zero. This voltage
cancellation occurs whenever there is voltage across the main transformer winding and current in the input
inductors rises when it does. When there is no voltage across the main transformer primary winding, the total
voltage across the dc bus capacitors appears at the output of the diode bridge; since this voltage is greater than
the input voltage, the input currents falls.
Fig. 3. Typical waveforms describing the modes of operation.
To simplify the analysis, the following assumptions are made, If the input currents are discontinuous, they will
be naturally nearly sinusoidal (when filtered) and in phase with the input voltages. 1) The input voltage value
can be considered as constant within a switching period as the period of the three-phase voltage supply is much
longer than the switching period;
2) All devices are ideal; 3) The currents in inductors La = Lb = Lc = Lin are iLa, iLb, iLc and have the same
amplitude; 4) The dc bus voltage has no ripple.
3. A New Single-Stage Multilevel Type Full-Bridge Converter Applied to closed loop condition
www.iosrjournals.org 26 | Page
The equivalent circuit in each stage is shown in Fig. 4. The converter goes through the following modes of
operation in a half switching cycle.
Mode 1 (t0 < t < t1):
During this interval, switches S1 and S2 are ON. The switches remain ON for a period given by D/2fsw. In this
mode, energy from the dc link capacitor C1 flows to the output load. Due to magnetic coupling, a voltage
appears across one of the auxiliary windings and cancels the total dc bus capacitor voltage; the voltage at the
diode bridge output is zero, and the input currents rise. Due to the high switching frequency, the supply voltage
is assumed constant within a switching cycle. In this mode, the three-phase input current equations are as
follows:
(1)
As it can be seen from (1), the equations that describe the relation between the current and voltage of input
currents iLa, iLb, and iLc are the same, but with different notation. Therefore, instead of using terms with
subscripts a, b, and c in this paper, a general notation → is defined so that only one equation is written instead of
three equations. Equation (1) can thus be rewritten as
(2)
The auxiliary inductor current increases during this mode,
and the following expression can be written:
(3)
At the end of Mode I, the current in the auxiliary inductor
Lin, during the kth interval is
(4)
where vk is the average value of the supply voltage in the interval k, D is the duty cycle, and fsw is the switching
frequency. Since the converter operates with a steady-state duty cycle D that is constant throughout the line
cycle, the peak value of an input inductor current at the end of this mode is dependent only on the supply
voltage.
The output inductor current can be expressed as
(5)
4. A New Single-Stage Multilevel Type Full-Bridge Converter Applied to closed loop condition
www.iosrjournals.org 27 | Page
where Vbus is the average dc-link voltage and VL is the average load voltage and N is the transformer ratio
between input and output (N = n1/n2). If it is assumed that the output inductor current is continuous, then the
following expression for peak to peak ripple can be derived:
(6)
(a)Mode 1(t0 < t < t1)
(b) Mode 2 (t1 < t < t2).
(c) Mode 3 (t2 < t < t3).
5. A New Single-Stage Multilevel Type Full-Bridge Converter Applied to closed loop condition
www.iosrjournals.org 28 | Page
(d) Mode 4 (t3 < t < t4).
Fig. 4. Modes of operation
Mode 2 (t1 < t < t2):
In this mode, S1 is OFF, and S2 remains ON. The energy stored in the auxiliary inductor during the previous
mode is completely transferred into the dc link capacitor. The amount of stored energy in the auxiliary inductor
depends upon the rectified supply voltage. This mode ends when the auxiliary inductor current reaches zero.
Also, during this mode, the load inductor current freewheels in the secondary of the transformer. The voltage
across the auxiliary inductors in Mode II is Vk| − Vbus, thus, the auxiliary current expression is as follows:
(7)
This mode ends when the auxiliary inductor current reaches zero. This mode lasts for Δs,k/2fsw amount of time;
using (4), the following expression can be found:
(8)
where Δs,k is the normalized period of Mode II. Equation (8) shows that the duration of this mode is time
varying along one ac line period. In order to ensure a discontinuous input current, the normalized period Δs,k
must satisfy the expression D+Δs,k < 1 for any interval k and any load conditions. Using (8), this constraint can
be written as
(9)
On the other hand, the load inductor current freewheels in the secondary of the transformer, which defines a
voltage across the load filter inductor equal to −VL; therefore, the load inductor current is given by
(10)
(11)
6. A New Single-Stage Multilevel Type Full-Bridge Converter Applied to closed loop condition
www.iosrjournals.org 29 | Page
Consequently, the following expression can be derived from (6) and (11)
(12)
Mode 3 (t2 < t < t3):
In this mode, the primary current of the main transformer circulates through D1 and S2, and the output inductor
current freewheels in the secondary. There is no energy transferred to the dc bus capacitors.
Mode 4 (t3 < t < t4):
In this mode, S1 and S2 are OFF, and the primary current of the transformer charges C2 through the body
diodes of S3 and S4. Switches S3 and S4 are switched ON at the end of this mode and the half switching cycle
ends. For the remainder of the switching cycle, the converter goes through Modes 1 to 4, but with S3 and S4 ON
instead of S1 and S2.
Mode 5 (t4 < t < t5): In this mode, S3 and S4 are ON; a symmetrical period begins. In this mode, energy flows
from the capacitor C2 into the load. The voltage across the auxiliary inductors becomes only the rectified supply
voltage of each phase, and the current flowing through each inductor increases.
Mode 6 (t5 < t < t6): In this mode, S3 is ON, and S4 is OFF. The energy stored in the auxiliary inductors during
the previous mode is completely transferred into the dc-link capacitor.
Mode 7 (t6 < t < t7): In this mode, S4 is OFF, and the primary current of the main transformer circulates through
the diode D2 and S3. The output inductor current also freewheels in the secondary of the transformer during this
mode.
Mode 8 (t7 < t < t8): In this mode, S3 and S4 are OFF, and the primary current of the transformer charges the
capacitor C1 through the body diodes of S1 and S2. Switches S1 and S2 are switched on at the end of this mode.
Output voltage regulation can be done by standard control methods that control duty cycle D. Duty cycle, D in
(4), is defined as the time when S1 and S2 are both ON during the first half cycle or when S3 and S4 are both
ON during the second half cycle. These two cases correspond to energy transfer modes of operation. Any
control method that can be used to regulate a two-level full-bridge converter by controlling D can be used to
regulate the proposed converter; the only difference is how the gating signals are implemented. For example, the
control for the proposed converter can be implemented with a conventional phase-shift PWM controller, and
some logic can be added to the output of the controller to generate the appropriate gating signals. Since the
converter is a multilevel converter, it should be implemented with some sort of capacitor voltage balancing to
ensure the voltage across each bus capacitor is the same.
Various such techniques have been proposed in the literature, including techniques that sense the capacitor
voltages and adjust the duty cycle of the converter switches appropriately.
III. MATLAB/SIMULINK MODELLING AND SIMULATION RESULTS
Here the simulation is carried out by two cases 1. Proposed Full Bridge Multilevel Converter 2. Proposed
Full Bridge Multilevel Converter with DC Machine Loading.
Case 1: Proposed Full Bridge Multilevel Converter
Fig. 5 Matlab/Simulink Model of Proposed Multilevel Full Bridge Converter
As above fig. 5 shows the Matlab/Simulink Model of Proposed Multilevel Full Bridge Converter.
7. A New Single-Stage Multilevel Type Full-Bridge Converter Applied to closed loop condition
www.iosrjournals.org 30 | Page
Fig. 6 Input current and voltage
As above Fig. 6 shows the input current and voltage, it represents the source side power factor of proposed
converter.
Fig.7 Voltage at Primary side Transformer
Fig. 8 Voltage Across switch
As above Fig. 8 shows the voltage across the switch in proposed multilevel full bridge converter.
Fig. 9 Output Voltage
As above fig. 9 shows the Output Voltage of Proposed Multilevel Full Bridge Converter. Here we get output at
steady state after the 0.1 sec.
Case 2: Proposed Full Bridge Multilevel Converter with Machine Loading
8. A New Single-Stage Multilevel Type Full-Bridge Converter Applied to closed loop condition
www.iosrjournals.org 31 | Page
Fig. 10 Matlab/Simulink Model of Proposed Multilevel Full Bridge Converter with machine load
As above fig. 10 shows the Matlab/Simulink Model of Proposed Multilevel Full Bridge Converter with DC
machine loading.
Fig. 11 Speed of motor
Fig.12 Armature Current
Fig.13 Electromagnetic Torque
As fig shows the performance characteristics of DC motor with proposed multilevel full bridge converter.
Case3:-proposed Full Bridge Multilevel Converter with closed loop condition
Fig14 Matlab/Simulink Model of Proposed Multilevel Full Bridge Converter with closed loop
v+
-
v5
v+
-
v4
v+
-
v3
v+
-
v2
v+
-
v1
v+
-
v
Discrete,
Ts = 5e-007 s.
powergui
i+
-
i3
i
+ -
i2
i
+ -
i1
i
+ -
i
Va2
Va1
Va
In1Out1
Subsystem1
In1Out1
Subsystem
Scope7
Scope6
Scope5
Scope4
Scope3
Scope2
Scope1
Scope
Pulse
Generator2
Pulse
Generator1
L3
L2
L1
L
3
Gain3
10
Gain1
10
Gain
PI
Discrete
PI Controller
m
a
k
D9
m
a
k
D8
m
a
k
D7
m
a
k
D6
m
a
k
D5
m
a
k
D4
m
a
k
D3
m
a
k
D2
m
a
k
D12
m
a
k
D11
m
a
k
D10
m
a
k
D1
3
Constant
C3
C2
C1
C
1
2
3
Aux1
12
Aux
gm
CE
4
gm
CE
3
gm
CE
2
gm
CE
1
9. A New Single-Stage Multilevel Type Full-Bridge Converter Applied to closed loop condition
www.iosrjournals.org 32 | Page
Fig15:-PI controller output
Fig:-16voltage across switch
Fig17:-Current across inductor
V. CONCLUSION
A three-phase, three-level, single-stage power-factor corrected ac/dc converter that operates with a
single controller to regulate the output voltage was presented in this paper. The proposed converter has the
following features. Proposed converter has an auxiliary circuit that can cancel the capacitor voltage in which
way the input inductor acts as a boost inductor to have a single-stage PFC. Proposed converter can operate with
lower peak voltage stresses across the switches and the dc bus capacitors as it is a three-level converter. This
allows for greater flexibility in the design of the converter and ultimately improved performance, proposed
converter is applied to closed loop condition.
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Authors Profile
K Vamshi krishna varma recieved the B.Tech (EEE) in 1994-1998 from S.V.University,
Tirupati(A.P)
, M.tech (Power electronics) in 2011 -2013 from PBRVITS Kavali(Nellore Dist) A.P.Worked
on reasearch areas Embedded systems, ARM processors, Bluetooth, Wi-fi, VLSI,Power plant
simulators, SCADA in various Multinational companies (TI Israel, Access company LTD
Japan, Samsung) from 1998 to 2011.currently working as Asst professor in EEE department ,
Training & placement officer in Geethanjali Institute of Science & Technology,
Gangavaram(Nellore Dist)
Vemana Arun sai pursuing B.Tech final-semester(ECE) from Geethanjali Institute of
Science & Technology Gangavaram(Nellore Dist)
Nasina Jyothirmayi pursuing B.Tech final-semester(ECE) from Geethanjali Institute of Science
& Technology Gangavaram(Nellore Dist)
Mohammed Wajidunnisa pursuing B.Tech final-semester(ECE) from Geethanjali Institute of
Science & Technology Gangavaram(Nellore Dist)
S.SRIDHAR recieved the B.Tech (EEE) in 1995-199 from AEC, Thiruvannamalai, T.N,
M.E in Applied Electronics from HCET,chennaiin 1999-2001,Worked as an Associate
Professor from Feb-2002 to July 2008 in department of Electrical & Electronics at
Annamacharya Institute of Science & Technology, Rajampet, Working as an Associate
Professor & H.O.D of EEE in department of Electrical &Electronics at Geethanjali Institute of
Science & Technology , Nellore since July -2008 to till date