In recent years, people have been committed to the development and the design of new lighting sources. The life of LED lamps depends on the life of the LED driver which has a great relationship with the life of the electrolytic capacitor. In this paper the advantages of the drive power of the electrolytic capacitor are analyzed and the design of the PFC circuit and the transformer is described in details. On the basis of the LNK417 driver chip, a novel single-stage flyback drive circuit without the electrolytic capacitor is designed, which combines the power factor correction technology and constant current control to avoid the use of large electrolytic capacitors. The design and implementation of the control circuit are given and the overall performance is tested and analyzed in the article. The test results show that the driver is of high efficiency, high PF and long life etc. The efficiency is up to 85% and the PF value is not less than 0.9.
A Novel Power Factor Correction Modified Bridge Less-CUK Converter for LED La...IJPEDS-IAES
In recent decades, several research works have been focused on the efficient Power Factor Correction (PFC) converter design in to meet the power supply efficiency. Conventional PFC cuk converter widely uses the full bridge rectifier which had resulted in overall increase of converter losses and inefficiency. This paper is intended to develop a novel PFC Bridgeless cuk converter for LED lamp applications. In this work, the limitations of the conventional PFC Cuk converter are resolved. The major contributions of the proposed work include the minimization in the number of conduction devices and minimization of the power utility devices which in turn resulted in minimal losses and better efficiency. Moreover, the proposed converter works in DCM which requires only one voltage sensor which results in reduced cost. The proposed Modified BL Cuk converter (MBL-CUK) for LED lamp is simulated in MATLAB and the corresponding results show the better power quality indices such as power factor and Total Harmonic Distortion.
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,
Analysis and design of single switch forward-flyback two-channel led driver w...LeMeniz Infotech
Analysis and design of single switch forward-flyback two-channel led driver with resonant-blocking capacitor
To Get this projects Call : 9566355386 / 99625 88976
Visit : www.lemenizinfotech.com / www.ieeemaster.com
Mail : projects@lemenizinfotech.com
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.
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.
A Novel Power Factor Correction Modified Bridge Less-CUK Converter for LED La...IJPEDS-IAES
In recent decades, several research works have been focused on the efficient Power Factor Correction (PFC) converter design in to meet the power supply efficiency. Conventional PFC cuk converter widely uses the full bridge rectifier which had resulted in overall increase of converter losses and inefficiency. This paper is intended to develop a novel PFC Bridgeless cuk converter for LED lamp applications. In this work, the limitations of the conventional PFC Cuk converter are resolved. The major contributions of the proposed work include the minimization in the number of conduction devices and minimization of the power utility devices which in turn resulted in minimal losses and better efficiency. Moreover, the proposed converter works in DCM which requires only one voltage sensor which results in reduced cost. The proposed Modified BL Cuk converter (MBL-CUK) for LED lamp is simulated in MATLAB and the corresponding results show the better power quality indices such as power factor and Total Harmonic Distortion.
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,
Analysis and design of single switch forward-flyback two-channel led driver w...LeMeniz Infotech
Analysis and design of single switch forward-flyback two-channel led driver with resonant-blocking capacitor
To Get this projects Call : 9566355386 / 99625 88976
Visit : www.lemenizinfotech.com / www.ieeemaster.com
Mail : projects@lemenizinfotech.com
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.
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.
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.
Closed loop simulation and hardware implementation of a LED driving circuit f...IJERA Editor
This work deals with the design and implementation of an AC to DC LED driving circuit consisting of a buck
boost converter and a flyback converter. A buck boost converter is integrated with a fly back converter by
sharing a single power switch. A recycling path is also provided to recycle the leakage energy stored in
transformer. An EMI filter and a diode bridge rectifier is also included in this converter topology, EMI filter is
used to eliminate high frequency current harmonics at the input line. Diode bridge rectifier is used to convert
AC source voltage to DC voltage. The control of this single switch is done by using DSPIC 30F2010.This
converter has simple structure, low cost, and ease of control as well. In this way, the developed converter can
provide high PF and low total harmonic distortion.
The detailed circuit operations and analysis are provided. The theoretical studies and analysis are tested by a
prototype of 16-W LED driver with a switching frequency of 60 kHz and also a closed loop simulation is done
in MATLAB simulink. The developed converter has maximum power factor of 0.96 and total harmonic
distortion of 10.54%
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.
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
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.
Light emitting diodes (LEDs) are current driven devices. So, it is essential to maintain the stability of LED voltage and current. Variation of temperature may cause of instabilities and bifurcations in the LED driver. Driving LEDs from an offline power source faces design challenges like it have to maintain low harmonics in input current, to achieve high power factor, high efficiency and to maintain constant LED current and to ensure long lifetime. This paper proposes the technique of harmonics reduction by using parametric optimization of Single ended primary inductor converter (SEPIC) based LED driver. Without optimization of SEPIC parameters input energy will not be properly transferred to the load and this un-transferred energy will be transmitted to the source. Consequently, the quality of input current will be hampered i.e. harmonics will contaminate the input current. Focussing this, the paper has presented the design of a non-isolated integrated-stage single-switch constant current LED driver operating in discontinuous conduction mode (DCM) in SEPIC incorporating the design of control circuit with soft start mechanism. This LED driver has achieved a good efficiency (90.6%) and high-power factor (0.98) with reduced harmonics (3.35%). System stability has been determined and simulation studies are performed to confirm the validity of the LED driver circuit. A laboratory prototype is built.
This paper presents the optimization of PFC Cuk converter parameter design for the minimization of THD and voltage ripple. In this study, the PFC Cuk converter is designed to operate in discontinuous conduction mode (DCM) in order to achieve almost unity power factor. The passive components, i.e., inductor and capacitor are designed based on switching frequency and resonant frequency. Nevertheless, the ranges of duty cycle for buck and boost operations are 0<D<0.5 and 0.5<D<1, respectively for the output voltage variation of the converter. The principle of the parameters design optimization is based on the balancing energy compensation between the input capacitor and output inductor for minimization of THD current. In addition, the selection of high output capacitance will minimize the output voltage ripple significantly. A 65 W PFC Cuk converter prototype is developed and experimentally tested to confirm the parameters design optimization principle. The experimental results show that the THD current is reduced to 4.5% from 61.3% and the output voltage ripple is reduced to 7 V from 18 V after parameters optimization are realized. Furthermore, it is confirmed that the output voltage ripple frequency is always double of the input line frequency, 50 Hz and the output voltage ripple is always lower than the maximum input voltage ripple.
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.
IEEE 2015-15 Power Electronics and Power System Project titles for ME and BE Students,Bangalore.power electronics and power system projects in bangalore.
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.
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.
A Five – Level Integrated AC – DC ConverterIJTET Journal
This paper presents the implementation of a new five – level integrated AC – DC converter with high input power factor and reduced input current harmonics complied with IEC1000-3-2 harmonic standards for electrical equipments. The proposed topology is a combination of boost input power factor pre – regulator and five – level DC – DC converter. The single – stage PFC (SSPFC) approach used in this topology is an alternative solution to low – power and cost – effective applications.
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.
Closed loop simulation and hardware implementation of a LED driving circuit f...IJERA Editor
This work deals with the design and implementation of an AC to DC LED driving circuit consisting of a buck
boost converter and a flyback converter. A buck boost converter is integrated with a fly back converter by
sharing a single power switch. A recycling path is also provided to recycle the leakage energy stored in
transformer. An EMI filter and a diode bridge rectifier is also included in this converter topology, EMI filter is
used to eliminate high frequency current harmonics at the input line. Diode bridge rectifier is used to convert
AC source voltage to DC voltage. The control of this single switch is done by using DSPIC 30F2010.This
converter has simple structure, low cost, and ease of control as well. In this way, the developed converter can
provide high PF and low total harmonic distortion.
The detailed circuit operations and analysis are provided. The theoretical studies and analysis are tested by a
prototype of 16-W LED driver with a switching frequency of 60 kHz and also a closed loop simulation is done
in MATLAB simulink. The developed converter has maximum power factor of 0.96 and total harmonic
distortion of 10.54%
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.
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
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.
Light emitting diodes (LEDs) are current driven devices. So, it is essential to maintain the stability of LED voltage and current. Variation of temperature may cause of instabilities and bifurcations in the LED driver. Driving LEDs from an offline power source faces design challenges like it have to maintain low harmonics in input current, to achieve high power factor, high efficiency and to maintain constant LED current and to ensure long lifetime. This paper proposes the technique of harmonics reduction by using parametric optimization of Single ended primary inductor converter (SEPIC) based LED driver. Without optimization of SEPIC parameters input energy will not be properly transferred to the load and this un-transferred energy will be transmitted to the source. Consequently, the quality of input current will be hampered i.e. harmonics will contaminate the input current. Focussing this, the paper has presented the design of a non-isolated integrated-stage single-switch constant current LED driver operating in discontinuous conduction mode (DCM) in SEPIC incorporating the design of control circuit with soft start mechanism. This LED driver has achieved a good efficiency (90.6%) and high-power factor (0.98) with reduced harmonics (3.35%). System stability has been determined and simulation studies are performed to confirm the validity of the LED driver circuit. A laboratory prototype is built.
This paper presents the optimization of PFC Cuk converter parameter design for the minimization of THD and voltage ripple. In this study, the PFC Cuk converter is designed to operate in discontinuous conduction mode (DCM) in order to achieve almost unity power factor. The passive components, i.e., inductor and capacitor are designed based on switching frequency and resonant frequency. Nevertheless, the ranges of duty cycle for buck and boost operations are 0<D<0.5 and 0.5<D<1, respectively for the output voltage variation of the converter. The principle of the parameters design optimization is based on the balancing energy compensation between the input capacitor and output inductor for minimization of THD current. In addition, the selection of high output capacitance will minimize the output voltage ripple significantly. A 65 W PFC Cuk converter prototype is developed and experimentally tested to confirm the parameters design optimization principle. The experimental results show that the THD current is reduced to 4.5% from 61.3% and the output voltage ripple is reduced to 7 V from 18 V after parameters optimization are realized. Furthermore, it is confirmed that the output voltage ripple frequency is always double of the input line frequency, 50 Hz and the output voltage ripple is always lower than the maximum input voltage ripple.
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.
IEEE 2015-15 Power Electronics and Power System Project titles for ME and BE Students,Bangalore.power electronics and power system projects in bangalore.
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.
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.
A Five – Level Integrated AC – DC ConverterIJTET Journal
This paper presents the implementation of a new five – level integrated AC – DC converter with high input power factor and reduced input current harmonics complied with IEC1000-3-2 harmonic standards for electrical equipments. The proposed topology is a combination of boost input power factor pre – regulator and five – level DC – DC converter. The single – stage PFC (SSPFC) approach used in this topology is an alternative solution to low – power and cost – effective applications.
Design and Implementation of Single Phase AC-DC Buck-Boost Converter for Powe...IJPEDS-IAES
This paper discusses the Power Factor Correction (PFC) for single phase AC-DC Buck-Boost Converter (BBC) operated in Continuous Conduction Mode (CCM) using inductor average current mode control. The proposed control technique employs Proportional-Integral (PI) controller in the outer voltage loop and the Inductor Average Current Mode Control (IACMC) in the inner current loop for PFC BBC. The IACMC has advantages such as robustness when there are large variations in line voltage and output load. The PI controller is developed by using state space average model of BBC. The simulation of the proposed system with its control circuit is implemented in MatLab/Simulink. The simulation results show a nearly unity power factor can be attained and there is almost no change in power factor when the line frequency is at various ranges. Experimental results are provided to show its validity and feasibility.
A Novel Integrated AC-DC Five Level Converter Strategy for Power Factor Corre...IJMTST Journal
Multilevel configuration has the advantage of its simplicity and modularity over the configurations of the other converters. With the application of multilevel converter in the high voltage and large power occasions in recent years, its modulation strategy has become a research hot point in the field of power electronics. The proposed power-factor-correction circuit can achieve unity power factor and ripple-free input current using a coupled inductor. The proposed rectifier can also produce input currents that do not have dead band regions and an output current that is continuous for all load conditions. The features of this converter are that it has lower input section peak current stresses and a better harmonic content than similar converter with a non-interleaved output, the output current is continuous for all load ranges, and the dc bus voltage is less than 450 for all line and load conditions. In this paper, the operation of the new converter is explained, its steady-state characteristics are determined by analysis, and these characteristics are used to develop a procedure for the design of the converter. Hence the simulation results are obtained using MATLAB/SIMULINK software. The proposed system provides a closed loop control for variable output voltage. The SSPFC AC/DC converter can operate with lower peak voltage stresses across the switches and the DC bus capacitors as it is a three-level converter. The proposed concept can be implemented with 5-level for efficient output voltage.
The conventional lighting sources like incandescent and fluorescent lamps are replaced by High Brightness Light Emitting Diodes (HB-LEDs). In this paper, a HBLED driver using a Single Ended Primary Inductor Converter (SEPIC) with input Power Factor Correction (PFC) is presented. PFC is accomplished using a commercial inexpensive Peak Current Mode Controller (PCMC) IC UC3842 is newly combined with SEPIC converter. Extensive simulation results are carried out and a laboratory prototype to power 18W LED array from AC mains is implemented and the results are presented in detail.
ENERGY-EFFICIENT LOW DROPOUT REGULATOR WITH SWITCHING MECHANISM AND COURSE RE...ijesajournal
The proposed work presents an Energy-efficient, low dropout (LDO) regulator with switching mechanism reduces the energy consumption of IoT devices when the sensors are in idle time. Based on the analysis of IoT devices and sensors, modern power management designs for IoT demands for fully integrated solutions to decrease power consumption while maintaining the quick transient response to signal variations. LDO voltage regulators, as power management devices should adjust to modern technological and industrial trends. To increase the current capability with a minimum standby quiescent current under small-signal operation, the proposed work has a switching circuit acting as an ON and OFF switch. To reduce the dropout a course regulator and loop filter is added and circuit is enhanced for maximum reduced dropout. As a result, the efficiency gets increased.
Average current control of DC-DC Cuk Converters as Power Factor CorrectorIJERA Editor
The era of electronic devices in all loads due to the manufacturing technologies replaced many conventional electrical or mechanical loads including lighting loads where Light Emitting Diodes (LEDs) is becoming an emerging technique with many advantages. High frequency switching dc-dc converter is a new technology to control the load and the supply side simultaneously. Due to additional harmonics generated by these switching converters power factor correction has become a necessity in utility side. This paper focuses on the power factor correction of the supply side when employing an ideal LED load with dc-dc Cuk converter. This paper also illustrates the controlling of the power factor correction employing high switching frequency dc-dc converters. The control loops employed are discussed and the strategy for designing the compensator is also explained. The simulated results have been shown to ascertain the accepted performance of the power factor correction converter.
ENERGY-EFFICIENT LOW DROPOUT REGULATOR WITH SWITCHING MECHANISM AND COURSE RE...ijesajournal
The proposed work presents an Energy-efficient, low dropout (LDO) regulator with switching mechanism
reduces the energy consumption of IoT devices when the sensors are in idle time. Based on the analysis of
IoT devices and sensors, modern power management designs for IoT demands for fully integrated solutions
to decrease power consumption while maintaining the quick transient response to signal variations. LDO
voltage regulators, as power management devices should adjust to modern technological and industrial
trends. To increase the current capability with a minimum standby quiescent current under small-signal
operation, the proposed work has a switching circuit acting as an ON and OFF switch. To reduce the
dropout a course regulator and loop filter is added and circuit is enhanced for maximum reduced dropout.
As a result, the efficiency gets increased.
Design Simulation and Hardware Construction of an Arduino Microcontroller Bas...ijtsrd
This study primarily focuses on the design of a high side buck converter using an Arduino microcontroller. The converter is specifically intended for use in DC DC applications, particularly in standalone solar PV systems where the PV output voltage exceeds the load or battery voltage. To evaluate the performance of the converter, simulation experiments are conducted using Proteus Software. These simulations provide insights into the input and output voltages, currents, powers, and efficiency under different state of charge SoC conditions of a 12V,70Ah rechargeable lead acid battery. Additionally, the hardware design of the converter is implemented, and practical data is collected through operation, monitoring, and recording. By comparing the simulation results with the practical results, the efficiency and performance of the designed converter are assessed. The findings indicate that while the buck converter is suitable for practical use in standalone PV systems, its efficiency is compromised due to a lower output current. Chan Myae Aung | Dr. Ei Mon "Design Simulation and Hardware Construction of an Arduino-Microcontroller Based DC-DC High-Side Buck Converter for Standalone PV System" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-8 | Issue-1 , February 2024, URL: https://www.ijtsrd.com/papers/ijtsrd64518.pdf Paper Url: https://www.ijtsrd.com/engineering/mechanical-engineering/64518/design-simulation-and-hardware-construction-of-an-arduinomicrocontroller-based-dcdc-highside-buck-converter-for-standalone-pv-system/chan-myae-aung
Power factor improvement on LED lamp driver using BIFRED converterTELKOMNIKA JOURNAL
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This paper presents the functions of Series-Loaded Resonant Converter (SLRC). Series Loaded Resonant DC-DC converter is a type of soft-switching topology widely known for providing improved efficiency. Zero voltage switching (ZVS) buck converter is more preferable over hard switched buck converter for low power, high frequency DC-DC conversion applications. Zero Voltage switching techniques will be used to improve the efficiency of current and voltage at the series loaded half-bridge rectifier. The results will be described from PSIM simulation, Programming of MATLAB calculation and hardware testing.
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In this paper, a Neural Network (NN) controlled Buck-Boost Converter (BBC) based Switched Mode Power Supply (SMPS) for a PC application is proposed. The proposed BBC is analyzed, modeled and designed for the rated load. Generally, the utilization of Multiple Output SMPS (MOSMPS) for PC application introduces Power Quality (PQ) issues in the power system network. Unlike conventional SMPS the proposed NN controlled BBC can accomplish improvement of power quality. The NN controller reduces the Total Harmonic Distortion (THD) of source current below 5%, maintains input side Power Factor (PF) to be nearly unity and improves the output voltage regulation. In the proposed system, NN controller replaces the conventional PI controller and overcomes the drawbacks of the conventional system. The proposed BBC is validated adopting MATLAB/SIMULINK software. The simulation analysis validate that the proposed NN controlled BBC performs better than conventional converter in terms of PQ indices under fluctuating conditions.
Similar to Design of LED Driver Power Based on LNK417EG (20)
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About
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Technical Specifications
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
Key Features
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface
• Compatible with MAFI CCR system
• Copatiable with IDM8000 CCR
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
Application
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
TECHNICAL TRAINING MANUAL GENERAL FAMILIARIZATION COURSEDuvanRamosGarzon1
AIRCRAFT GENERAL
The Single Aisle is the most advanced family aircraft in service today, with fly-by-wire flight controls.
The A318, A319, A320 and A321 are twin-engine subsonic medium range aircraft.
The family offers a choice of engines
Cosmetic shop management system project report.pdfKamal Acharya
Buying new cosmetic products is difficult. It can even be scary for those who have sensitive skin and are prone to skin trouble. The information needed to alleviate this problem is on the back of each product, but it's thought to interpret those ingredient lists unless you have a background in chemistry.
Instead of buying and hoping for the best, we can use data science to help us predict which products may be good fits for us. It includes various function programs to do the above mentioned tasks.
Data file handling has been effectively used in the program.
The automated cosmetic shop management system should deal with the automation of general workflow and administration process of the shop. The main processes of the system focus on customer's request where the system is able to search the most appropriate products and deliver it to the customers. It should help the employees to quickly identify the list of cosmetic product that have reached the minimum quantity and also keep a track of expired date for each cosmetic product. It should help the employees to find the rack number in which the product is placed.It is also Faster and more efficient way.
1. IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE)
e-ISSN: 2278-1676,p-ISSN: 2320-3331, Volume 12, Issue 1 Ver. IV (Jan. – Feb. 2017), PP 16-22
www.iosrjournals.org
DOI: 10.9790/1676-1201041622 www.iosrjournals.org 16 | Page
Design of LED Driver Power Based on LNK417EG
Fu Xiansong1,3
Hao Changjie2,3
1
.School of Electrical Engineering & Automation Tianjin Polytechnic University Tianjin China
2
.School of Electronics & Information Engineering Tianjin Polytechnic University Tianjin China
3
Key Laboratory of Advanced Electrical Engineering and Energy Technology Tianjin China)
Abstract: In recent years, people have been committed to the development and the design of new lighting
sources. The life of LED lamps depends on the life of the LED driver which has a great relationship with the life of
the electrolytic capacitor. In this paper the advantages of the drive power of the electrolytic capacitor are
analyzed and the design of the PFC circuit and the transformer is described in details. On the basis of the LNK417
driver chip, a novel single-stage flyback drive circuit without the electrolytic capacitor is designed, which
combines the power factor correction technology and constant current control to avoid the use of large
electrolytic capacitors. The design and implementation of the control circuit are given and the overall
performance is tested and analyzed in the article. The test results show that the driver is of high efficiency, high
PF and long life etc. The efficiency is up to 85% and the PF value is not less than 0.9.
Keywords: electrolytic capacitor; single-stage flyback; high power factor; LNK417
I. Introduction
In recent years people have been committed to the development and the design of new lighting
sources. The drive power with high efficiency, low cost, high power factor and long life is the key to ensuring
LED light quality and overall performance[1]
. Due to the ambient temperature, voltage, ripple current, frequency
and other factors, the life of the electrolytic capacitor is only a few thousand hours, while the life of LED light
source can reach tens of thousands of hours. Their lives do not match, greatly reducing the life of the LED drive
power[2]
. This article is to study how to solve the problem of the short life of the LED drive power by removing
or replacing the capacitors.
This paper designs a new type of LED drive circuit without electrolytic capacitor based on
LNK417EG, analyses the main part in details and finally produces a prototype to verify the conclusion.
II. Design Indicators and Overall Framework of the Drive Circuit
2.1 Design Indicators
The input is a wide range of AC voltage 90V ~ 265V and the output is 500mA/30V. In the rated input voltage
range, the efficiency reaches 85% and the power factor is not less than 0.9.
2.2 Hardware Design
LED driver hardware design of no electrolytic capacitor includes 9 parts: the preceding-stage protection circuit,
EMI filter circuit, rectifier circuit, clamp circuit, power conversion circuit, control circuit, feedback circuit,
output circuit, and LED array. The system block is shown as the Fig 1.
Pre-protection
circuit
EMI filter
circuit
Rectifier circuit Clamp circuit
Power conversion
circuit
Output circuit LED array
Control circuit Feedback circuit
fig.1 block diagram of the circuit
2.3 Analysis of the LNK417EG Working Mechanism
LNK417EG belongs to the Power Internationas company's Linkswitch-H series. The LNK417EG chip
itself has very good electrical characteristics and perfect protection and has integrated the PWM control module
into the chip, which can effectively prevent the strobe from impacting the LED working efficiency, making the
output frequency of the voltage within a very good range. Besides, chips of LinkSwitch-PH series are highly
integrated, in small size and more stable.
2. Design of LED Driver Power Based on LNK417EG
DOI: 10.9790/1676-1201041622 www.iosrjournals.org 17 | Page
The internal principle of LNK417 chip is shown in Figure 2.
fig.2 LNK417 chip internal schematic
Pin Function Description:
R pin: reference pin. This pin is used to connect the external precise resistors in the circuit and acts as an
intervening pin for non-TRIAC dimming modes.
V pin: voltage detection pin. This pin is connected to the external circuit input main line and detects its peak
value.
FB pin: feedback pin. This pin is used for feedback connection of the output voltage.
BP pin: bypass pin. This pin can choose to output different powers as well as different capacitance values
according to actual requirements.
S pin: source pin. In the LNK417EG chip is a 725V internal FET and this pin will connect the internal power
FET source pin.
D pin: drain pin. This pin is connection point for the drain of the power FET and can provide start and stable
internal operating current, making the whole chip work in a stable current state.
III. PFC and Transformer Design
3.1 Single-stage Flyback PFC Circuit Design
After years of development, the two-stage PFC technology has been mature and stable. The two-stage
PFC technology has many excellent electrical properties: THD less than 5%, PF up to 0.99, PFC stage constant
output voltage, wide input voltage range and so on. However, the realization needs complex circuit structure.
The high production costs and the increasing power supply volume lead to the lack of competitiveness in
low-power applications[3]
.
This power supply uses single-stage flyback PFC circuit design and has different flyback converter
modes. The current flowing through the inductor depends on the actual conditions, which may be divided into
the following three modes: current critical mode (BCM), the current discontinuous mode (DCM), and current
continuous mode (CCM). Flyback converter working in CCM mode not only can guarantee that the output
current is continuous but also make the output ripple current smaller[4]
. So in this case the output part of the
circuit and rectifier filter circuit are relatively easy to achieve and can make the overall efficiency of the system
much higher[5]
. If it works in DCM mode, the output current is discontinuous, the output ripple is larger and the
rectifier filter part is relatively complex and thus makes the system less efficient.
Single-stage PFC scheme is shown in Figure 3. Compared with the two-stage PFC circuit, the
single-stage circuit combines DC/DC stage and PFC stage and has only one switch and one control circuit.
When the switch V conducts, the voltage VC is applied to the primary winding of the transformer. When the
rectified voltage is greater than Np, the current will flow through the capacitor C2. When V is cut off, the
reverse voltage applied to C2 is the sum of the voltage VN2 on Ns and VC1 minus the input voltage. The
addition of two coupling coils N1 and N2 provides a negative feedback voltage that reduces the voltage stress
on C1 and improves efficiency.
3. Design of LED Driver Power Based on LNK417EG
DOI: 10.9790/1676-1201041622 www.iosrjournals.org 18 | Page
R1 R0
T
C0
PFC
DC/DC
DC/DC
controller
V
Vref
Np Ns
C1
C2
fig.3 single-stage PFC schematic
3.2 Transformer Design
Flyback high-frequency transformer is actually a power inductor design. It needs the following steps to calculate
the primary side inductance value, core size and winding turns.
(1) Maximum duty cycle
According to the volt seconds balance method it can be:
i n o n o r o f fV t V t
(1)
Where ton is T conductance time and toff is the T cutoff time.
The duty cycle D satisfies the following formula:
offon
on
tt
t
D
(2)
Finishing the two formula it is available that:
or
or in
V
D
V V
(3)
According to the design requirements, the minimum input voltage Vin(max)=√2×90V=127V, Dmax=0.44.
(2) Calculate the primary side current
MOS tube during the opening meets the relationship:
dt
di
LV p
pin (4)
Thus:
T
di
I
T
p
AVG
0
(5)
The flyback converter designed in this paper operates in continuous mode
0 (min)
( )
(min)
2 ( )or in
pk ccm pk
in or
P V V
I I
V V
(6)
According to practical experience, in this design take =0.6 into the parameters )(ccmpkI
= 0.81A.
(3) Find the primary side inductance value
The primary side inductance value is expressed as
4. Design of LED Driver Power Based on LNK417EG
DOI: 10.9790/1676-1201041622 www.iosrjournals.org 19 | Page
2
(max)0
22
(max)
)(
)(2 inors
orin
ccmp
VVfP
VV
L
(7)
Take the parameters to find Lp=1.6mH.
The actual operation allows the error range to be within 10%.
(4) Core size selection
Using AP method to find the core size:
ew AAAP (8)
Where AP represents the core area product, Aw means the core windable wire window area [6]
.
Derived:
wswf
SRMSsRMSp
ew
JKfBK
IVIV
AAAP
(9)
The final selected core is RM10.
(5) The calculation of the number of turns of the second and second sides
Find the primary winding formula:
BA
IL
N
e
ccmpkp
p
)(
(10)
Magnetic core RM10's Ae=0.966cm2, take =0.25T, then Np = 45 turns.
According to the basic principles of the transformer:
s
s
P
or
N
V
N
V
(11)
Substituting data, then Ns = 15 turns.
The relationship between the secondary winding Ns and the auxiliary side winding NB is:
d
B
s
B
VV
V
N
N
0
(12)
Substituting data, NB = 9 turns.
IV. Design of Circuit and Test Results
4.1 Overall circuit design
According to the choice of the chip before, PFC circuit and the calculation of the transformer, the LED driver is
designed with an output voltage of 30V and an output current of 500mA.
The overall circuit design is shown in Figure 4.
F
1
1
0
K
R
5
1
0
K
R
1
47nF/275V
C
X
1
1000
uH
,
0.3
A
L
1
L
N
1.33K
R14
D
3
22uf/50V
C
2
2
0
K
R
4
1
5
0
R
R
3
1
0
0
K
R
6
0.15uF
C13
100
nF
,
50
V
C12
1
u
F
,
50
V
C14
B
R
1
Bridge1
V
R
2
D
4
D
7
V
2
S
5
R
1
F
B
3
B
P
4
U
1
LNK417
V
+
V
-
10uF/50v
C
7
2.2nF
C
9
250
V
,
0.2
A
D
7
24.9K
R10
1
K
R12
1
0
K
R11
V
R
1
3.01K
R
8
1
0
5
K
R
9
D
6
D
2
D
5
D
1
2
M
R
2
1
M
R
7
8
8
7
K
R13
100nF/500V
C10
220nF/630V
C
8
100nF/500V
C11
1000
uH
,
0.3
A
L
2
1000
uH
,
0.3
A
L
3
R
V
1
1
3
1
0
8
6
5
2
T
1
RM10
Q
1
1000
uH
,
0.3
A
L
0
fig.4 schematic diagram
5. Design of LED Driver Power Based on LNK417EG
DOI: 10.9790/1676-1201041622 www.iosrjournals.org 20 | Page
The physical diagram of the circuit is shown in Figure 5.
fig.5 physical diagram
4.2 PFC Test Results and Analysis
Steady-state input voltage and current waveform and input current harmonic test are shown in Figure 6.
(a) Steady-state voltage and current waveform
(b) Steady-state current harmonic test chart
fig.6 input voltage and current waveforms and the input current harmonic waveform
In Figure 6 (a), the above waveform is the current waveform; the bottom is the voltage waveform.
From the figure it can be seen that the input current and input voltage conduction angle is the same–the standard
sine wave. In the single-stage flyback PFC circuit, the correction of the power factor is not as ideal as the
two-stage circuit[7]
, but for low-power products its circuit structure and cost advantages are reflected because of
the mathematical relationship between total harmonic distortion and PF[8]
. Therefore, the total harmonic diagram
has a more intuitive judgment for the power factor. Figure 6 (b) is the total harmonic map.
4.3 Test Results under Wide Range of Input Voltage
When the input voltage changes from 85V to 265V, the efficiency curve is shown in Figure 7.
80 100 120 140 160 180 200 220 240 260 280
87.0
87.5
88.0
88.5
89.0
89.5
90.0
90.5
91.0
91.5
92.0
effectiveness
input voltage (v)
27V
30V
33V
fig.7 efficiency graph
6. Design of LED Driver Power Based on LNK417EG
DOI: 10.9790/1676-1201041622 www.iosrjournals.org 21 | Page
Figure 7 shows that when the output voltage is 27V, 30V, and 33V respectively, with the input voltage
changes, the efficiency first increases and then reduces. When the voltage is 210V or so, it reaches the maximum
and no matter how the input voltage changes, the efficiency remains above 88% to meet the design
requirements.
When the input voltage changes from 85V to 265V, the power factor curve is shown in Figure 8.
80 100 120 140 160 180 200 220 240 260 280
0.86
0.88
0.90
0.92
0.94
0.96
0.98
1.00
Powerfactor
Input voltage(V)
27V
30V
33V
fig.8 power factor graph
It can be seen from Figure 8 that the power factor decreases gradually with the input voltage
increasing and decreases to 0.91 when the input voltage is 265 V. When the input voltage is constant, the higher
the output voltage, the higher the power factor. Within the wide input voltage range, when the overall power
factor is greater than 0.9, it meets the design requirements.
When the input voltage changes from 85V to 265V, the harmonic current curve is shown in Figure 9.
80 100 120 140 160 180 200 220 240 260 280
10
12
14
16
18
20
22
24
26
28
30
32
Harmoniccurrent(%)
Input voltage(V)
27v
30v
33v
fig.9 harmonic current graph
It can be seen from Figure 9, within the input voltage range, the content of THD has a clear upward trend. When
the input voltage is constant, the content of THD decreases as the output voltage increases.
V. Conclusion
According to the design requirements of home lighting condition, this paper designs an LED drive
power of no electrolytic capacitor with the characteristics of LNK417EG chip and calculates and designs the
PFC circuit and transformer parameters and makes the prototype and performs the performance test.
Experimental results show that this power supply’s output current is stable, the power efficiency is up to 85%,
power factor is higher than 0.90, and the overall performance of the circuit is good and meets the design
requirements. Because the design of no electrolytic capacitors greatly optimizes the life of the LED driver, it has
an effective use value.
7. Design of LED Driver Power Based on LNK417EG
DOI: 10.9790/1676-1201041622 www.iosrjournals.org 22 | Page
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