This paper presents a high step-down transformerless single-stage single-switch AC/DC converter suitable for universal line applications from 90-270Vrms. The topology integrates a buck-type power factor correction cell with a buck-boost DC/DC cell, allowing part of the input power to transfer directly to the output after the first power processing stage. This direct power transfer feature, along with shared capacitor voltages, allows for efficient power conversion with high power factor, low voltage stress under 130V on the intermediate bus, and low output voltage without needing a high step-down transformer. Experimental results validate the analysis and design procedures for the proposed circuit.
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.
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.
We provide project guidance for final year MTech, BTech, MSc, MCA, ME, BE, BSc, BCA & Diploma students in Electronics, Computer Science, Information Technology, Instrumentation, Electrical & Electronics, Power electronics, Mechanical, Automobile etc. We provide live project assistance and will make the students involve throughout the project. We specialize in Matlab, VLSI, CST, JAVA, .NET, ANDROID, PHP, NS2, EMBEDDED, ARDUINO, ARM, DSP, etc based areas. We research in Image processing, Signal Processing, Wireless communication, Cloud computing, Data mining, Networking, Artificial Intelligence and several other areas. We provide complete support in project completion, documentation and other works related to project.Success is a lousy teacher. It seduces smart people into thinking they can't lose.we have better knowledge in this field and updated with new innovative technologies.
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Design of Half Bridge LLC Resonant Converter for Low Voltage Dc ApplicationsIOSRJEEE
An advanced hybrid LLC series resonant converter with united flying-capacitor cell is proposed in this paper to permit the high step-down conversion in the high input voltage applications. The in-built flyingcapacitor branch in the primary side can efficiently share out the primary switch voltage stress related with the half-bridge LLC converters. And the input voltage can be shared correspondingly and automatically between the two series half-bridge components lacking additional balance circuit or control strategies owing to the built-in flying- capacitor cell. Likewise, the inherent soft switching performance in extensive load range that exists in the LLC converters is still kept to decrease the switching losses, which ensures the high efficiency. In addition, the proposed converter can be comprehensive to reduce the switch voltage stress byemploying stacked connection. Finally, a 500∼640 Vinput 48 Voutput 1 kW prototype is built and tested to verify the efficiency of the proposed converter. The results prove that the proposed converter is an excellent candidate for the high input voltage and high step-down dc/dc conversion systems.
We provide project guidance for final year MTech, BTech, MSc, MCA, ME, BE, BSc, BCA & Diploma students in Electronics, Computer Science, Information Technology, Instrumentation, Electrical & Electronics, Power electronics, Mechanical, Automobile etc. We provide live project assistance and will make the students involve throughout the project. We specialize in Matlab, VLSI, CST, JAVA, .NET, ANDROID, PHP, NS2, EMBEDDED, ARDUINO, ARM, DSP, etc based areas. We research in Image processing, Signal Processing, Wireless communication, Cloud computing, Data mining, Networking, Artificial Intelligence and several other areas. We provide complete support in project completion, documentation and other works related to project.Success is a lousy teacher. It seduces smart people into thinking they can't lose.we have better knowledge in this field and updated with new innovative technologies.
Call me at: 9037291113.
Infographic: Europe Online Gaming Market 2015yStats.com
Free infographic from our report "Europe Online Gaming Market 2015".
Find it here: https://www.ystats.com/infographic-europe-online-gaming-market-2015/
Find the report available for download here: https://www.ystats.com/product/europe-online-gaming-market-2015/
Design of Half Bridge LLC Resonant Converter for Low Voltage Dc ApplicationsIOSRJEEE
An advanced hybrid LLC series resonant converter with united flying-capacitor cell is proposed in this paper to permit the high step-down conversion in the high input voltage applications. The in-built flyingcapacitor branch in the primary side can efficiently share out the primary switch voltage stress related with the half-bridge LLC converters. And the input voltage can be shared correspondingly and automatically between the two series half-bridge components lacking additional balance circuit or control strategies owing to the built-in flying- capacitor cell. Likewise, the inherent soft switching performance in extensive load range that exists in the LLC converters is still kept to decrease the switching losses, which ensures the high efficiency. In addition, the proposed converter can be comprehensive to reduce the switch voltage stress byemploying stacked connection. Finally, a 500∼640 Vinput 48 Voutput 1 kW prototype is built and tested to verify the efficiency of the proposed converter. The results prove that the proposed converter is an excellent candidate for the high input voltage and high step-down dc/dc conversion systems.
Universal demand for power increases due to continuous development to fulfil all these demand. Resources
are used with optimization. A high efficiency and high power factor converters are the major parts of energy
transfer system. This paper present a general review on single stage forward and flyback converter topologies to get
better its performance. This is paper presents a kind general idea of increasing efficiency and power factor of single
stage forward and fly back converter.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
New Topology for Transformer less Single Stage -Single Switch AC/DC ConverterIJMER
This paper presents a transformer less single-stage single-switch ac/dc converter suitable for universal line applications (90–270 Vrms). The topology consists of a buck-type power-factor correction (PFC) cell with a buck–boost dc/dc cell and part of the input power is directly coupled to the output after the first power processing. With this direct power transfer and sharing capacitor voltages, the converter is able to achieve efficient power conversion, high power factor, low voltage stress on intermediate bus (less than 120 V) and low output voltage without a high step-down transformer. The absence of transformer reduces the size of the circuit , component counts and cost of the converter. Unlike most of the boost-type PFC cell, the main switch of the proposed converter only handles the peak inductor current of dc/dc cell rather than the superposition of both inductor currents. Tight voltage regulation is provided by using PID controller. Detailed analysis and design procedures and simulation of the proposed circuit are given .
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.
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.
Design of an Integrated Power Factor Converter with PI Controller for Low Pow...IOSRJEEE
In this paper, an integrated power factor converter with PI controller is proposed. The circuit topology is obtained by integrating two converters namely the buck converter and a boost converter. The boost converter is normally a step up converter which obtain an unity power factor and performs low harmonics at the input. Based on the simple circuit topology and easy control the boost converter or buck-boost converter is used as power factor correctors. Similarly the buck converter regulates the dc-link voltage and provide a stable dc output voltage. To achieve unity power factor, the output voltage of both converter should be higher than the amplitude of the ac line voltage. The steady -state analysis is developed and a design is provided
Research Inventy : International Journal of Engineering and Scienceresearchinventy
Research Inventy : International Journal of Engineering and Science is published by the group of young academic and industrial researchers with 12 Issues per year. It is an online as well as print version open access journal that provides rapid publication (monthly) of articles in all areas of the subject such as: civil, mechanical, chemical, electronic and computer engineering as well as production and information technology. The Journal welcomes the submission of manuscripts that meet the general criteria of significance and scientific excellence. Papers will be published by rapid process within 20 days after acceptance and peer review process takes only 7 days. All articles published in Research Inventy will be peer-reviewed.
IOSR Journal of Electrical and Electronics Engineering(IOSR-JEEE) is an open access international journal that provides rapid publication (within a month) of articles in all areas of electrical and electronics engineering and its applications. The journal welcomes publications of high quality papers on theoretical developments and practical applications in electrical and electronics engineering. Original research papers, state-of-the-art reviews, and high quality technical notes are invited for publications.
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.
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.
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GET IEEE BIG DATA,JAVA ,DOTNET,ANDROID ,NS2,MATLAB,EMBEDED AT LOW COST WITH BEST QUALITY PLEASE CONTACT BELOW NUMBER
FOR MORE INFORMATION PLEASE FIND THE BELOW DETAILS:
Nexgen Technology
No :66,4th cross,Venkata nagar,
Near SBI ATM,
Puducherry.
Email Id: praveen@nexgenproject.com
Mobile: 9791938249
Telephone: 0413-2211159
www.nexgenproject.com
Similar to A high step down transformer less single-stage single-switch acdc converter (20)
A high step down transformer less single-stage single-switch acdc converter
1. A HIGH STEP-DOWN TRANSFORMER LESS SINGLE-STAGE
SINGLE-SWITCH AC/DC CONVERTER
ABSTRACT:
This paper presents a high step-down tranformerless single-stage single-switch ac/dc converter
suitable for universal line applications (90-270 Vrms). The topology integrates a buck-type power-factor
correction (PFC) cell with a buck-boost dc/dc cell and part of the input power is coupled to the output
directly after the first power processing. With this direct power transfer feature and sharing capacitor
voltages, the converter is able to achieve efficient power conversion, high power factor, low voltage stress
on intermediate bus (less than 130 V) and low output voltage without a high step-down transformer. The
absence of transformer reduces the component counts and cost of the converter. Unlike most of the boosttype PFC cell, the main switch of the proposed converter only handles the peak inductor current of dc/dc cell
rather than the superposition of both inductor currents. Detailed analysis and design procedures of the
proposed circuit are given and verified by experimental results.
