The document discusses the design, operation, and control of inductive charging converters. It begins by introducing inductive power transfer and its advantages over wired charging. It then covers the concepts of mutual coupling between conductors and how this enables wireless power transfer. The document focuses on LLC resonant converter topology, describing the converter stages and equivalent circuit model. It provides the transfer function analysis and discusses designing the converter parameters, such as quality factor and inductance values, to achieve high efficiency power transfer over a suitable frequency range.
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
International Journal of Engineering Research and Applications (IJERA) aims to cover the latest outstanding developments in the field of all Engineering Technologies & science.
International Journal of Engineering Research and Applications (IJERA) is a team of researchers not publication services or private publications running the journals for monetary benefits, we are association of scientists and academia who focus only on supporting authors who want to publish their work. The articles published in our journal can be accessed online, all the articles will be archived for real time access.
Our journal system primarily aims to bring out the research talent and the works done by sciaentists, academia, engineers, practitioners, scholars, post graduate students of engineering and science. This journal aims to cover the scientific research in a broader sense and not publishing a niche area of research facilitating researchers from various verticals to publish their papers. It is also aimed to provide a platform for the researchers to publish in a shorter of time, enabling them to continue further All articles published are freely available to scientific researchers in the Government agencies,educators and the general public. We are taking serious efforts to promote our journal across the globe in various ways, we are sure that our journal will act as a scientific platform for all researchers to publish their works online.
Efficiency of Wireless Power Transfer System with PWM Methode as Rectifier on...TELKOMNIKA JOURNAL
One part of the wireless power transfer system is rectifier, where the energy which received by
the receiver conditioned according to the device character. While devices with direct current as a wave
form of electrical energy is commonly used. Conventional rectifier was using half wave or full wave circuit
where uses diode circuit, capacitor and transformer as filter. The disadvantage of the system is reactive
power and harmonization. We proposed the pulse width modulation because PWM could enhanced power
factor value on an AC voltage source system with 50 Hz frequency. The main focus on which this study
was based was to derive efficiency values from pulse width modulation utilization in the rectification
process while the frequency work at 5 MHz and highest power at 54.48 Watt, and compare this reasearch
with published research for similar systems. To achieve the objectives of this study then performed design
and build system, measurement and analysis of the value of system efficiency. The results of the research
obtained the highest value of efficiency at 81%.
Coupled Inductor Based High Step-Up DC-DC Converter for Multi Input PV SystemIJERA Editor
With the shortage of the energy and ever increasing of the oil price, research on the renewable and green energy
sources, especially the solar arrays and the fuel cells, becomes more and more important. How to achieve high
step-up and high efficiency DC/DC converters is the major consideration in the renewable power applications
due to the low voltage of PV arrays and fuel cells. In this paper a coupled inductor dc-dc converter for photovoltaic
system is proposed. The circuit configuration of the proposed converter is very simple. Thus, the
proposed converter has higher step-up and step-down voltage gains than the conventional bidirectional dc–dc
boost/buck converter. Under same electric specifications for the proposed converter and the conventional
bidirectional boost/buck converter, the average value of the switch current in the proposed converter is less than
the conventional bidirectional boost/buck converter. The operating principles have been applied to multi input
photovoltaic system and outputs have been observed.
Electrical, Electronics and Computer Engineering,
Information Engineering and Technology,
Mechanical, Industrial and Manufacturing Engineering,
Automation and Mechatronics Engineering,
Material and Chemical Engineering,
Civil and Architecture Engineering,
Biotechnology and Bio Engineering,
Environmental Engineering,
Petroleum and Mining Engineering,
Marine and Agriculture engineering,
Aerospace Engineering.
International Journal of Engineering Research and 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
International Journal of Engineering Research and Applications (IJERA) aims to cover the latest outstanding developments in the field of all Engineering Technologies & science.
International Journal of Engineering Research and Applications (IJERA) is a team of researchers not publication services or private publications running the journals for monetary benefits, we are association of scientists and academia who focus only on supporting authors who want to publish their work. The articles published in our journal can be accessed online, all the articles will be archived for real time access.
Our journal system primarily aims to bring out the research talent and the works done by sciaentists, academia, engineers, practitioners, scholars, post graduate students of engineering and science. This journal aims to cover the scientific research in a broader sense and not publishing a niche area of research facilitating researchers from various verticals to publish their papers. It is also aimed to provide a platform for the researchers to publish in a shorter of time, enabling them to continue further All articles published are freely available to scientific researchers in the Government agencies,educators and the general public. We are taking serious efforts to promote our journal across the globe in various ways, we are sure that our journal will act as a scientific platform for all researchers to publish their works online.
Efficiency of Wireless Power Transfer System with PWM Methode as Rectifier on...TELKOMNIKA JOURNAL
One part of the wireless power transfer system is rectifier, where the energy which received by
the receiver conditioned according to the device character. While devices with direct current as a wave
form of electrical energy is commonly used. Conventional rectifier was using half wave or full wave circuit
where uses diode circuit, capacitor and transformer as filter. The disadvantage of the system is reactive
power and harmonization. We proposed the pulse width modulation because PWM could enhanced power
factor value on an AC voltage source system with 50 Hz frequency. The main focus on which this study
was based was to derive efficiency values from pulse width modulation utilization in the rectification
process while the frequency work at 5 MHz and highest power at 54.48 Watt, and compare this reasearch
with published research for similar systems. To achieve the objectives of this study then performed design
and build system, measurement and analysis of the value of system efficiency. The results of the research
obtained the highest value of efficiency at 81%.
Coupled Inductor Based High Step-Up DC-DC Converter for Multi Input PV SystemIJERA Editor
With the shortage of the energy and ever increasing of the oil price, research on the renewable and green energy
sources, especially the solar arrays and the fuel cells, becomes more and more important. How to achieve high
step-up and high efficiency DC/DC converters is the major consideration in the renewable power applications
due to the low voltage of PV arrays and fuel cells. In this paper a coupled inductor dc-dc converter for photovoltaic
system is proposed. The circuit configuration of the proposed converter is very simple. Thus, the
proposed converter has higher step-up and step-down voltage gains than the conventional bidirectional dc–dc
boost/buck converter. Under same electric specifications for the proposed converter and the conventional
bidirectional boost/buck converter, the average value of the switch current in the proposed converter is less than
the conventional bidirectional boost/buck converter. The operating principles have been applied to multi input
photovoltaic system and outputs have been observed.
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.
Modified Bidirectional Converter with Current Fed InverterIJPEDS-IAES
A bidirectional dc-dc converter with multiple outputs are concatenated with a
high frequency current source parallel resonant push pull inverter is
presented in this paper. The two outputs are added together and it is taken as
the input source for the inverter. The current source parallel resonant push
pull inverter implemented here with high frequency applications like
induction heating, Fluorescent lighting, Digital signal processing sonar. This
paper proposes a simple photovoltaic power system consists of a
bidirectional converter and a current fed inverter for regulating the load
variations. Solar power is used as the input source for the system. Simulation
of the proposed system is carried out in PSIM software and experimentally
verified the results.
A Novel Control Strategy of Indirect Matrix Converter Using Space Vector Modu...IJPEDS-IAES
This paper introduces a control scheme of Indirect Matrix Converter which includes space vector modulation to stabilize the frequency variations. The terminal voltage and frequency of any synchronous machine can be controlled easily with this scheme. Further the control strategy is proposed and implemented in Matlab/Simulink Embedded system which gives significant better performance compared to conventional control technique like better Total Harmonic Distortion (THD), more output voltage with same Modulation Index, less switching stress and less switching loss. This method might prove effective for wind energy conversion system using DFIG as the DFIG speed is close to synchronous speed. The complete control strategy is verified using MATLAB/Simulink.
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.
The control of motor rotation speed by the change of resistor resistance value in armature circuit is called ‘resistor control”. For the regulation of resistance value R0, included in armature winding circuit, we can use various technical solutions. The most used solution is the discrete variation of armature added resistance value by shunting its parts with contactors contacts. Nowadays, the change of resistor resistance in armature circuit can be realized by shunting with a given porosity γ of resistor R0 trough electronic keys. In this paper, we study the design of control system represented on figure 1.
Simulation of 3-phase matrix converter using space vector modulationIJECEIAES
This paper illustrates the simulation of 3-phase matrix converter using Space Vector Modulation (SVM). Variable AC output voltage engendered using matrix converter with bidirectional power switches controlled by appropriate switching pulse. The conventional PWM converter engenders switching common mode voltage across the load system terminals, which cause to common mode current and its leads to bearing failure in load drive. These problems can be rectified using SVM and which minimize the effect on the harmonic fluctuation in AC output voltage and stress on the power switch is reduced using bidirectional switch for proposed 3-phase matrix converter. The simulation results have been presented to validate the proposed system using matlab / simulink.
International Journal of Engineering Research and Applications (IJERA) is a team of researchers not publication services or private publications running the journals for monetary benefits, we are association of scientists and academia who focus only on supporting authors who want to publish their work. The articles published in our journal can be accessed online, all the articles will be archived for real time access.
Our journal system primarily aims to bring out the research talent and the works done by sciaentists, academia, engineers, practitioners, scholars, post graduate students of engineering and science. This journal aims to cover the scientific research in a broader sense and not publishing a niche area of research facilitating researchers from various verticals to publish their papers. It is also aimed to provide a platform for the researchers to publish in a shorter of time, enabling them to continue further All articles published are freely available to scientific researchers in the Government agencies,educators and the general public. We are taking serious efforts to promote our journal across the globe in various ways, we are sure that our journal will act as a scientific platform for all researchers to publish their works online.
High gain dc-dc step up converters have been used in renewable energy systems, for example, photovoltaic grid connected system and fuel cell power plant to step up the low level dc voltage to a high level dc bus voltage. If the conventional boost converter is to meet this demand, it should be operated at an extreme duty cycle (duty cycle closes to unity), which will cause electromagnetic interference, reverse recovery problem and conduction loss at the power switches. This paper proposes a class of non-isolated dc-dc step up converters which provide very high voltage gain at a small duty cycle (duty cycle < 0.5). Firstly, the converter topologies are derived based on active switched inductor network and combination of active and passive switched inductor networks; secondly, the modes of operation of proposed active switched inductor converter and combined active and passive switched inductor converter are illustrated; thirdly, the performance of the proposed converters are analyzed mathematically in details and compared with conventional boost converter. Finally, the analysis is verified by simulation results.
In this article, we have proposed a new control of a PV system connected to the grid. The goal is
to reduce current and voltage harmonicsfor increasing the quality of delivered energy. First, we have
modeled a PV panel. Then we have dimensioned the BOOST converter by finding L and C values. Next,
we have used Perturb and Observe (P&O) Maximum Power Point Control (MPPT) to improve energy
efficiency. Finally, We have developed a control of single-phase H-bridge inverter in order to eliminate the
3rd,5th,7th and 9th harmonics order, and added an LCLTo connect the PV inverter to the grid, an LCL
betweenthe inverter and the grid. Theperformance of the proposed system was tested by computing
spectrum and THD usingMatlab/Simulink software. The proposed architecture provides better Total
Harmonic Distortion (THD) which satisfy the EN50160 requirement the THD must be less than 4.66%. We
found that THD was decreased from 61.93% to 0.04%.
Modern trend in power generation is the use of two-stage configuration i.e., allocating a single PV cell
to a converter to produce grid voltage of adequate requirement and then to convert DC to AC voltage for grid
cnnection. Usually, the first stage is a DC-DC boost type converter which is responsible for extracting maximum
power from panel and boosting PV voltage to a value higher than peak of grid voltage. A converter is proposed,
which is derived from an active network based converter, is chosen as the first stage and a five level inverter is
used as the second stage of the configuration. Thus, in overall, the converter used is having high gain and reduced
switching stress. The Inverter used is having the advantage of low filter requirement, reduced stress, EMI and
reduced THD level. A closed loop control of the converter is done to maintain constant output voltage under
varying input voltage. MATLAB R2014a version software is used to simulate the model. The prototype of the
two stage configuration was developed and tested in the laboratory and results were verified using PIC 16F877A.
Comparative Evaluation of Generalized Multicell Impedance Source Inverter for...IJPEDS-IAES
Voltage-Source Inverter is limited by its only voltage step-down operation. In adding with extra boosting the flexibility is kept active for the number of semiconductors which is unchanged, voltage-type Z-source inverter was earlier proposed. This new class of inverter is generally less sensitive to electromagnetic noises. However, their boosting capabilities are anyhow less with high component stresses and poorer spectral performances caused by low modulation index ratios. Their boosting gains are, therefore, restricted in practice. To overcome these we use the generalized switched-inductor Z- source inverter is proposed, By comparing with PWM technique and SPWM technique, whose extra boosting abilities and other advantages have been verified in simulation analysis and experiment.
On the dynamic behavior of the current in the condenser of a boost converter ...TELKOMNIKA JOURNAL
In this paper, an analytical and numerical study is conducted on the dynamics of the current in the condenser of a boost converter controlled with ZAD, using a pulse PWM to the symmetric center. A stability analysis of periodic 1T-orbits was made by the analytical calculation of the eigenvalues of the Jacobian matrix of the dynamic system, where the presence of flip and Neimar–Sacker-type bifurcations was determined. The presence of chaos, which is controlled by ZAD and FPIC techniques, is shown from the analysis of Lyapunov exponents.
This paper presents the simulation design of dc/dc interleaved boost converter with zero-voltage switching (ZVS). By employin the interleaved structure, the input current stresses to switching devices were reduced and this signified to a switching conduction loss reduction. All the parameters had been calculated theoretically. The proposed converter circuit was simulated by using MATLAB/Simulink and PSpice software programmes. The converter circuit model, with specifications of output power of 200 W, input voltage range from 10~60 V, and operates at 100 kHz switching frequency was simulated to validate the designed parameters. The results showed that the main switches of the model converter circuit achieved ZVS conditions during the interleaving operation. Consequently, the switching losses in the main switching devices were reduced. Thus, the proposed converter circuit model offers advantages of input current stress and switching loss reductions. Hence, based on the designed parameters and results, the converter model can be extended for hardware implementation.
Modified Bidirectional Converter with Current Fed InverterIJPEDS-IAES
A bidirectional dc-dc converter with multiple outputs are concatenated with a
high frequency current source parallel resonant push pull inverter is
presented in this paper. The two outputs are added together and it is taken as
the input source for the inverter. The current source parallel resonant push
pull inverter implemented here with high frequency applications like
induction heating, Fluorescent lighting, Digital signal processing sonar. This
paper proposes a simple photovoltaic power system consists of a
bidirectional converter and a current fed inverter for regulating the load
variations. Solar power is used as the input source for the system. Simulation
of the proposed system is carried out in PSIM software and experimentally
verified the results.
A Novel Control Strategy of Indirect Matrix Converter Using Space Vector Modu...IJPEDS-IAES
This paper introduces a control scheme of Indirect Matrix Converter which includes space vector modulation to stabilize the frequency variations. The terminal voltage and frequency of any synchronous machine can be controlled easily with this scheme. Further the control strategy is proposed and implemented in Matlab/Simulink Embedded system which gives significant better performance compared to conventional control technique like better Total Harmonic Distortion (THD), more output voltage with same Modulation Index, less switching stress and less switching loss. This method might prove effective for wind energy conversion system using DFIG as the DFIG speed is close to synchronous speed. The complete control strategy is verified using MATLAB/Simulink.
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.
The control of motor rotation speed by the change of resistor resistance value in armature circuit is called ‘resistor control”. For the regulation of resistance value R0, included in armature winding circuit, we can use various technical solutions. The most used solution is the discrete variation of armature added resistance value by shunting its parts with contactors contacts. Nowadays, the change of resistor resistance in armature circuit can be realized by shunting with a given porosity γ of resistor R0 trough electronic keys. In this paper, we study the design of control system represented on figure 1.
Simulation of 3-phase matrix converter using space vector modulationIJECEIAES
This paper illustrates the simulation of 3-phase matrix converter using Space Vector Modulation (SVM). Variable AC output voltage engendered using matrix converter with bidirectional power switches controlled by appropriate switching pulse. The conventional PWM converter engenders switching common mode voltage across the load system terminals, which cause to common mode current and its leads to bearing failure in load drive. These problems can be rectified using SVM and which minimize the effect on the harmonic fluctuation in AC output voltage and stress on the power switch is reduced using bidirectional switch for proposed 3-phase matrix converter. The simulation results have been presented to validate the proposed system using matlab / simulink.
International Journal of Engineering Research and Applications (IJERA) is a team of researchers not publication services or private publications running the journals for monetary benefits, we are association of scientists and academia who focus only on supporting authors who want to publish their work. The articles published in our journal can be accessed online, all the articles will be archived for real time access.
Our journal system primarily aims to bring out the research talent and the works done by sciaentists, academia, engineers, practitioners, scholars, post graduate students of engineering and science. This journal aims to cover the scientific research in a broader sense and not publishing a niche area of research facilitating researchers from various verticals to publish their papers. It is also aimed to provide a platform for the researchers to publish in a shorter of time, enabling them to continue further All articles published are freely available to scientific researchers in the Government agencies,educators and the general public. We are taking serious efforts to promote our journal across the globe in various ways, we are sure that our journal will act as a scientific platform for all researchers to publish their works online.
High gain dc-dc step up converters have been used in renewable energy systems, for example, photovoltaic grid connected system and fuel cell power plant to step up the low level dc voltage to a high level dc bus voltage. If the conventional boost converter is to meet this demand, it should be operated at an extreme duty cycle (duty cycle closes to unity), which will cause electromagnetic interference, reverse recovery problem and conduction loss at the power switches. This paper proposes a class of non-isolated dc-dc step up converters which provide very high voltage gain at a small duty cycle (duty cycle < 0.5). Firstly, the converter topologies are derived based on active switched inductor network and combination of active and passive switched inductor networks; secondly, the modes of operation of proposed active switched inductor converter and combined active and passive switched inductor converter are illustrated; thirdly, the performance of the proposed converters are analyzed mathematically in details and compared with conventional boost converter. Finally, the analysis is verified by simulation results.
In this article, we have proposed a new control of a PV system connected to the grid. The goal is
to reduce current and voltage harmonicsfor increasing the quality of delivered energy. First, we have
modeled a PV panel. Then we have dimensioned the BOOST converter by finding L and C values. Next,
we have used Perturb and Observe (P&O) Maximum Power Point Control (MPPT) to improve energy
efficiency. Finally, We have developed a control of single-phase H-bridge inverter in order to eliminate the
3rd,5th,7th and 9th harmonics order, and added an LCLTo connect the PV inverter to the grid, an LCL
betweenthe inverter and the grid. Theperformance of the proposed system was tested by computing
spectrum and THD usingMatlab/Simulink software. The proposed architecture provides better Total
Harmonic Distortion (THD) which satisfy the EN50160 requirement the THD must be less than 4.66%. We
found that THD was decreased from 61.93% to 0.04%.
Modern trend in power generation is the use of two-stage configuration i.e., allocating a single PV cell
to a converter to produce grid voltage of adequate requirement and then to convert DC to AC voltage for grid
cnnection. Usually, the first stage is a DC-DC boost type converter which is responsible for extracting maximum
power from panel and boosting PV voltage to a value higher than peak of grid voltage. A converter is proposed,
which is derived from an active network based converter, is chosen as the first stage and a five level inverter is
used as the second stage of the configuration. Thus, in overall, the converter used is having high gain and reduced
switching stress. The Inverter used is having the advantage of low filter requirement, reduced stress, EMI and
reduced THD level. A closed loop control of the converter is done to maintain constant output voltage under
varying input voltage. MATLAB R2014a version software is used to simulate the model. The prototype of the
two stage configuration was developed and tested in the laboratory and results were verified using PIC 16F877A.
Comparative Evaluation of Generalized Multicell Impedance Source Inverter for...IJPEDS-IAES
Voltage-Source Inverter is limited by its only voltage step-down operation. In adding with extra boosting the flexibility is kept active for the number of semiconductors which is unchanged, voltage-type Z-source inverter was earlier proposed. This new class of inverter is generally less sensitive to electromagnetic noises. However, their boosting capabilities are anyhow less with high component stresses and poorer spectral performances caused by low modulation index ratios. Their boosting gains are, therefore, restricted in practice. To overcome these we use the generalized switched-inductor Z- source inverter is proposed, By comparing with PWM technique and SPWM technique, whose extra boosting abilities and other advantages have been verified in simulation analysis and experiment.
On the dynamic behavior of the current in the condenser of a boost converter ...TELKOMNIKA JOURNAL
In this paper, an analytical and numerical study is conducted on the dynamics of the current in the condenser of a boost converter controlled with ZAD, using a pulse PWM to the symmetric center. A stability analysis of periodic 1T-orbits was made by the analytical calculation of the eigenvalues of the Jacobian matrix of the dynamic system, where the presence of flip and Neimar–Sacker-type bifurcations was determined. The presence of chaos, which is controlled by ZAD and FPIC techniques, is shown from the analysis of Lyapunov exponents.
This paper presents the simulation design of dc/dc interleaved boost converter with zero-voltage switching (ZVS). By employin the interleaved structure, the input current stresses to switching devices were reduced and this signified to a switching conduction loss reduction. All the parameters had been calculated theoretically. The proposed converter circuit was simulated by using MATLAB/Simulink and PSpice software programmes. The converter circuit model, with specifications of output power of 200 W, input voltage range from 10~60 V, and operates at 100 kHz switching frequency was simulated to validate the designed parameters. The results showed that the main switches of the model converter circuit achieved ZVS conditions during the interleaving operation. Consequently, the switching losses in the main switching devices were reduced. Thus, the proposed converter circuit model offers advantages of input current stress and switching loss reductions. Hence, based on the designed parameters and results, the converter model can be extended for hardware implementation.
Similar to Operation and Control of Inductive Wireless Power Transfer (20)
6th International Conference on Machine Learning & Applications (CMLA 2024)ClaraZara1
6th International Conference on Machine Learning & Applications (CMLA 2024) will provide an excellent international forum for sharing knowledge and results in theory, methodology and applications of on Machine Learning & Applications.
NO1 Uk best vashikaran specialist in delhi vashikaran baba near me online vas...Amil Baba Dawood bangali
Contact with Dawood Bhai Just call on +92322-6382012 and we'll help you. We'll solve all your problems within 12 to 24 hours and with 101% guarantee and with astrology systematic. If you want to take any personal or professional advice then also you can call us on +92322-6382012 , ONLINE LOVE PROBLEM & Other all types of Daily Life Problem's.Then CALL or WHATSAPP us on +92322-6382012 and Get all these problems solutions here by Amil Baba DAWOOD BANGALI
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Hierarchical Digital Twin of a Naval Power SystemKerry Sado
A hierarchical digital twin of a Naval DC power system has been developed and experimentally verified. Similar to other state-of-the-art digital twins, this technology creates a digital replica of the physical system executed in real-time or faster, which can modify hardware controls. However, its advantage stems from distributing computational efforts by utilizing a hierarchical structure composed of lower-level digital twin blocks and a higher-level system digital twin. Each digital twin block is associated with a physical subsystem of the hardware and communicates with a singular system digital twin, which creates a system-level response. By extracting information from each level of the hierarchy, power system controls of the hardware were reconfigured autonomously. This hierarchical digital twin development offers several advantages over other digital twins, particularly in the field of naval power systems. The hierarchical structure allows for greater computational efficiency and scalability while the ability to autonomously reconfigure hardware controls offers increased flexibility and responsiveness. The hierarchical decomposition and models utilized were well aligned with the physical twin, as indicated by the maximum deviations between the developed digital twin hierarchy and the hardware.
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.
Overview of the fundamental roles in Hydropower generation and the components involved in wider Electrical Engineering.
This paper presents the design and construction of hydroelectric dams from the hydrologist’s survey of the valley before construction, all aspects and involved disciplines, fluid dynamics, structural engineering, generation and mains frequency regulation to the very transmission of power through the network in the United Kingdom.
Author: Robbie Edward Sayers
Collaborators and co editors: Charlie Sims and Connor Healey.
(C) 2024 Robbie E. Sayers
Final project report on grocery store management system..pdfKamal Acharya
In today’s fast-changing business environment, it’s extremely important to be able to respond to client needs in the most effective and timely manner. If your customers wish to see your business online and have instant access to your products or services.
Online Grocery Store is an e-commerce website, which retails various grocery products. This project allows viewing various products available enables registered users to purchase desired products instantly using Paytm, UPI payment processor (Instant Pay) and also can place order by using Cash on Delivery (Pay Later) option. This project provides an easy access to Administrators and Managers to view orders placed using Pay Later and Instant Pay options.
In order to develop an e-commerce website, a number of Technologies must be studied and understood. These include multi-tiered architecture, server and client-side scripting techniques, implementation technologies, programming language (such as PHP, HTML, CSS, JavaScript) and MySQL relational databases. This is a project with the objective to develop a basic website where a consumer is provided with a shopping cart website and also to know about the technologies used to develop such a website.
This document will discuss each of the underlying technologies to create and implement an e- commerce website.
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CW RADAR, FMCW RADAR, FMCW ALTIMETER, AND THEIR PARAMETERSveerababupersonal22
It consists of cw radar and fmcw radar ,range measurement,if amplifier and fmcw altimeterThe CW radar operates using continuous wave transmission, while the FMCW radar employs frequency-modulated continuous wave technology. Range measurement is a crucial aspect of radar systems, providing information about the distance to a target. The IF amplifier plays a key role in signal processing, amplifying intermediate frequency signals for further analysis. The FMCW altimeter utilizes frequency-modulated continuous wave technology to accurately measure altitude above a reference point.
We have compiled the most important slides from each speaker's presentation. This year’s compilation, available for free, captures the key insights and contributions shared during the DfMAy 2024 conference.
Gen AI Study Jams _ For the GDSC Leads in India.pdf
Operation and Control of Inductive Wireless Power Transfer
1. DESIGN, OPERATION AND CONTROL OF INDUCTIVE CHARGING
CONVERTER
Team Members
• Akash Vishwakarma - 224102101 (Theory, LaTeX and Documentation)
• Kotnana Akesh - 224102102 (Theory content and MATLAB Simulation)
• Satyam Mishra - 224102108 (Visio and LaTeX works)
2. 1. Introduction:
Inductive Power Transfer (IPT) is the transfer of electrical energy from source to electrical load
by magnetic coupling having isolation between at least two electrical circuit. There are various DC
load like Mobile Phones and Electrical Vehicles to charges such types of load using Inductive Power
Transfer (IPT) having safety and comfort are key benefits compare to wired traditional wired recharge
method. During the use of wires connection probability of electrocution risk is more, especially for
high power systems and in wet conditions. In place of wired connection between source and electrical
load completely, placing the load device upon or near to a magnetic pad can provide wireless battery
charging.
Wireless battery charging systems are actually available on the market for both low power
applications, such as mobile phones, and high power levels, such as in electrical vehicle. Research is
still focused on efficiency related issues, there are several innovative solutions to improve the power
conversion efficiency are presented.[2-3]
2. Origin of Inductive Power Transfer and Wireless Charging:
In 1894, Inductive power transfer was first time used when M. Hutin and M. Le-Blanc proposed
an apparatus and method to feed power to electric vehicle. In 1972, Professor Don Otto from the
University Auckland proposed a vehicle, IPT is takes place when transmitters in the road and a receiver
on the vehicle. In 1977, John E. Trombly was awarded a patent for an ”Electromagnetically coupled
battery charger.” This patent discuss an application to charge headlamp batteries. The first application
of inductive charging used in the US(united states) was performed by J.G. Bolger, F.A. Kirsten, and
S. Ng in 1978. They made an electric vehicle powered with a system at 180 Hz with 20 kW.[5-6]
3. Concept of Mutual Coupling:
A current carrying conductor produce magnetic field and the direction of that magnetic field
can be determine by Fleming’s right hand thumb rule. It tells us that, if one holds a current carrying
conductor in right hand in such a way that thumb is placed the direction of current flow through
the conductor then the curled fingers of the right hand indicate the direction of magnetic field. If
these magnetic field links with any other conductor then these two conductors are said to be mutually
coupled. For increasing the magnetic filed we are using Numbers of coils. Here L1 and L2 are the
self inductance and M is mutual inductance between the windings. 𝜔 is the angular frequency of ac
voltage.
1
3. Figure 1: Circuit of Mutual Coupling
By simplification of Figure 1 we will get Figure 2.
Figure 2: Simplified Circuit of Mutual Coupling
After applying KVL in above circuit we can get these equations.
𝑉𝑠 = (𝑅 + 𝑗𝜔𝐿1) ∗ 𝐼1 + 𝑗𝜔𝑀 ∗ 𝐼2 (1)
𝑉𝑜 = 𝑗𝜔𝑀 ∗ 𝐼1 + (𝑅2 + 𝑗𝜔𝐿2) ∗ 𝐼2 (2)
From above two equation it is clear that just because of mutual coupling we are getting output.
4. Overview of Inductive Charging Converter:
There are several ways to transfer electrical power wirelessly through a converter but here we are
using a LLC resonant converter.It has several advantages and desired features such as high efficiency.
LLC resonant converter operating at three different mode by varying the switching frequency around
2
4. resonant frequency. There are three stages to operate converter.
Figure 3: Inductive Charging Converter
•
shows a Full-Bridge LLC converter. Here in first stage circuit is Full Bridge Inverter which generate
square waveform (on the basis of switching) and second stage circuit is Full Bridge Rectifier, both
stages linked togather with LLC resonant Tank.To excite the LLC resonant tank, result in a resonant
sinusoidal current. After passing through LLC tank IPT takes place and rectify the AC signal in DC,
at the end of second stage we can connect load to draw DC current for charging.
5. Block Diagram and Equivalent circuit of the Converter:
Here by using power balance we can refer dc resistance on ac side, this is known as ac equivalent
resistance.
Figure 4: Simplified Block Diagram of the Converter
3
5. Figure 5: Equivalent Circuit of Converter
So, By equating power on both sides,
𝑃𝑎𝑐 = 𝑃𝑑𝑐
𝐼2
𝑎𝑐 ∗ 𝑅𝑎𝑐 = 𝐼2
𝑑𝑐 ∗ 𝑅𝑑𝑐
𝐼2
𝑎𝑐 ∗ 𝑅𝑎𝑐 = (
2𝐼𝑚
𝜋
)2
∗ 𝑅𝑑𝑐
𝐼2
𝑎𝑐 ∗ 𝑅𝑎𝑐 = (
2
√
2𝐼𝑎𝑐
𝜋
)2
∗ 𝑅𝑑𝑐
Equivalent ac resistance on secondary side of the transformer is -
𝑅𝑎𝑐 =
8
𝜋2
𝑅𝑑𝑐
Assume N𝑃 is primary turns and N𝑆 is the secondary turns of the transformer, then ac resistance
referred to primary side is-
𝑅′
𝑎𝑐 =
8
𝜋2
𝑁2
𝑃
𝑁2
𝑆
𝑅𝑑𝑐 (3)
4
6. a. Transfer Function of the Converter:
Transfer function of the system is defined as Laplace transform of the ratio of output to input of
the system with taking all initial condition zero.
𝑉𝑐𝑑
𝑉𝑎𝑏
=
𝑍𝑦
𝑍𝑥 + 𝑍𝑦
𝑉𝑐𝑑
𝑉𝑎𝑏
=
𝑗𝑋𝑚𝑅𝑒
𝑗𝑋𝑚+𝑅𝑒
𝑗𝑋𝑚𝑅𝑒
𝑗𝑋𝑚+𝑅𝑒
+ 𝑗𝑋𝐿𝑟 − 𝑗𝑋𝑐𝑟
𝑉𝑐𝑑
𝑉𝑎𝑏
=
𝑗𝑋𝑚 𝑅𝑒
𝑗𝑋𝑚 𝑅𝑒 + ( 𝑗𝑋𝐿𝑟 − 𝑗𝑋𝑐𝑟)( 𝑗𝑋𝑚 + 𝑅𝑒)
𝑉𝑐𝑑
𝑉𝑎𝑏
=
1
1 + 𝑗𝑋𝐿𝑟
𝑅𝑒
− 𝑗𝑋𝑐𝑟
𝑅𝑒
+ 𝑋𝐿𝑟
𝑋𝑚
− 𝐶𝑐𝑟
𝑋𝑚
𝑉𝑐𝑑
𝑉𝑎𝑏
=
1
(1 + 𝑋𝐿𝑟 −𝑋𝑐𝑟
𝑋𝑚
) + 𝑗( 𝑋𝐿𝑟 −𝑋𝑐𝑟
𝑅𝑒
)
considering the fundamental component is
𝑉𝑜1
𝑉𝑖1
=
8
𝜋2
√︃
(1 + 𝐿𝑟
𝐿𝑚
− 𝐿𝑟
𝜔2𝐶𝑟 𝐿𝑟 𝐿𝑚
)2 + (𝜔𝐿𝑟
𝑅𝑒
− 1
𝜔𝐶𝑟 𝑅𝑒
)2
now let us define
𝑄 =
𝜔𝑜𝐿𝑟
𝑅𝑒
=
1
𝜔𝑜𝐶𝑟 𝑅𝑒
𝜔𝑜 =
1
√
𝐿𝑟𝐶𝑟
, 𝜔𝑥 =
𝜔
𝜔𝑜
𝑉𝑜1
𝑉𝑖1
=
8
𝜋2
√︃
((1 + 𝐿𝑟
𝐿𝑚
)(1 − 1
𝜔2
𝑥
))2 + 𝑄2(𝜔𝑥 − 1
𝜔𝑥
)2
𝑅𝑒 =
8
𝜋2
𝑁2
𝑃
𝑁2
𝑆
∗ 𝑅𝐿
𝑚 =
𝐿𝑚 + 𝐿𝑟
𝐿𝑟
𝑎𝑛𝑑 𝜔𝑥 =
𝜔
𝜔𝑜
Voltage gain of the above equivalent circuit is-
𝐺(𝑄, 𝑚, 𝜔𝑥) =
𝑉𝑜
𝑉𝑖𝑛
=
8
𝜋2
∗
𝜔2
𝑥 (𝑚 − 1)
√︁
(𝑚𝜔2
𝑥 − 1)2 + 𝑄2𝜔2
𝑥 (𝜔2
𝑥 − 1)2(𝑚 − 1)2
(4)
5
7. where
𝑚 =
𝐿𝑚 + 𝐿𝑟
𝐿𝑟
𝑎𝑛𝑑 𝜔𝑥 =
𝜔
𝜔𝑜
from the above expression, we can say that Gain is varying inversely with of. For high a values range
of frequencies that the converter can operate is good , but the gain is less. Similarly if we take less Q
value the gain is good but frequency range becomes less.
Quality Factor of the circuit is the ratio of energy stored in energy storage element to energy
dissipated in the circuit. So Quality Factor of the circuit is-
𝑄 =
𝜔𝑜𝐿𝑟
𝑅𝑎𝑐
=
1
𝜔𝑜𝐶𝑟 𝑅𝑎𝑐
(5)
6. Designing parameters of the converter:
Here we are going to design parameter in such a way that performance of the converter gives
best performance.We will maintain maximum efficiency at which converter can operate safely and
fulfilling the requirements.
Step 1: Selecting the Q𝑚𝑎𝑥 Value: Quality factor of the circuit is depend on the load. We
can vary Quality Factor Q on the basis of load, For heavy load (large load current) maintaining high
value of Quality factor Q and for light load condition (Small load current) maintaining low value of
Quality Factor Q. It is important to set a Q𝑚𝑎𝑥 value related with the maximum load point, in order
to maintain mininum Voltage regulation, Figure 6 shows an example voltage gain v/s frequency plot
for different-different Q values.Let’s assume that the required gain of resonant tank is from 0.8 to 1.2
for example, we can see that the low Q value curve (Q=0.3) can variation in gain is very much. It
is more sensitive to for lower values of frequency but less sensitive for frequency “above resonance
f𝑠>f𝑟” region. So we have to increase the switching frequency in order to reach the minimum voltage
gain (K=0.8), this high switching frequency causes higher switching losses, while for higher Q value
curve (take Q=1) we can fulfil the minimum gain criteria (K=0.8) with less switching frequency, but
at this Q we can not fulfil maximum gain (K=1.2) criteria. Therefore, we have to go for a moderate
Q value, around 0.5 seems to satisfy the voltage gain desired criteria in this specific case. So, we can
conclude that by adjusting the Q value possible to achieve maximum gain but increases the frequency
modulation range, thus, we should not rely on tuning the Q𝑚𝑎𝑥 value as a design iteration in order
to reach maximum gain. Tuning of m value is better option for simplicity. Tuning of m value will
explain in next step. Although there isn’t any direct method for selecting the optimum Q value, we
should select Q𝑚𝑎𝑥 moderately as discussed previously and based on the specific design in hand.
6
8. Figure 6: Gain v/s frequency plot for m=6
Step 2: Selection of m Value: m is a static parameter that we have define earlier now we are
going to design and optimizing its value, m value plays an important role for the converter, first we
are seeing the impact of m for the converter operation. Here in below figures showing the variation
of gain for different-2 m values (m=3,6 and 15). It is clear that lower value of m resulting higher
boost gain for narrow range of frequency, so meaning more flexible control and regulation, which is
valuable in applications with wide input voltage range. However, low values of m for the same quality
factor Q and resonant frequency f𝑟 means smaller magnetizing inductance L𝑚, hence, it will draw
higher magnetising current, it causing increased circulating energy and conduction losses. we have to
vary m values from 6 to 10 for selecting best suitable m value. at the end we can optimize it by few
iteration to get the maximum m value that can still achieve the maximum gain requirement for all load
conditions.[1]
At Low m value At High m value
Higher boost gain Higher magnetizing inductance
Narrower frequency range Lower magnetizing circulating current
flexible regulation Higher efficiency
Table 1: Input Parameters
7
10. Step 3: Finding the Minimum Normalized Switching Frequency: After selecting Q𝑚𝑎𝑥 value
and an initial m value, we have to find the minimum normalized switching frequency that will ensure
inductive operation for the Q𝑚𝑎𝑥 (max load) condition, this minimum frequency will also guarantee
inductive operation for all other loads. The minimum normalized switching frequency occurs at the
peak gain of the Q𝑚𝑎𝑥 curve, so it can be found by the following equation
𝑑
𝑑𝐹𝑥
𝐾(𝑄, 𝑚, 𝐹𝑥𝑚𝑖𝑛) = 0 (6)
solve for F𝑥𝑚𝑖𝑛 from the above equation.
Step 4: Voltage Gain Verification: This step is to check that the maximum gain K𝑚𝑎𝑥 reached
during the maximum load by the selected m value is suitable. This can be done by solving Eq. 7, or
can be visually spotted in the gain plot as in Figure 6.Few iterations are needed in order to reach the
optimized design, If K𝑚𝑎𝑥 is not enough, then we have to reduce the m value and repeat step 3 and
step 4, in order to get the higher boost gain. On the other side, If required value of K is lower than the
K𝑚𝑎𝑥; in that case we can increase the m value and repeat step 3 and step 4 in order to gain a better
efficiency.
𝐾𝑚𝑎𝑥 = 𝐾(𝑄𝑚𝑎𝑥, 𝑚, 𝐹𝑥𝑚𝑖𝑛) (7)
Step 5: Calculating Resonant Components Value: Resonant tank values L𝑟 , C𝑟, and then L𝑚
can be calculated using the following equations
𝑅𝑎𝑐,𝑚𝑖𝑛 =
8
𝜋2
𝑁2
𝑃
𝑁2
𝑆
𝑉2
𝑜
𝑃𝑜𝑚𝑎𝑥
𝑄 =
√︁
𝐿𝑟/𝐶𝑟
𝑅𝑎𝑐,𝑚𝑖𝑛
𝐹𝑥𝑚𝑖𝑛 =
𝑓𝑠
𝑓𝑟
𝑓𝑟 =
1
2𝜋
√
𝐿𝑟𝐶𝑟
𝑚 =
𝐿𝑚 + 𝐿𝑟
𝐿𝑟
Here we can observe that the resonant frequency f𝑟 was not considered in the design steps above,it
is due to fact that, it has no effect on the maximum gain and operating region of the resonant converter,
however it is selected based on the converter power density and power losses of the converter.
9
11. 7. Modes of Operation of the Converter:
For this converter Resonant frequency (f𝑟) is fixed but changing parameter is switching frequency
(f𝑠). we can operate the converter in different modes by changing the switching frequency only and
converter can only work in two possible operations , those are-
1) Power delivery operation: This occurs twice in a switching cycle; Fig 9.1 and Fig 9.2
describes these 2 occurances. first,in the first half of the switching cycle, when the resonant tank is
excited with a positive voltage, so the current resonates in the positive direction, shown in Figure 9.1,
and second occurance is,in the second half of the switching cycle when the resonant tank is excited
with negative voltage and current resonates in the negative direction , shown in Figure 9.2.
Figure 9.1 Figure 9.2
2) Freewheeling operation: This operation is after power delivery operation only if current
at resonance will reach upto the transformer magnetizing current, this only happens when f𝑠<f𝑟,
and secondary current of transformerto will reach zero and the rectifier will disconnect,now the
magnetizing inductor is free to enter into the resonance with the resonant inductor and capacitor, the
frequency of this second resonance is smaller than the original resonant frequency f𝑟.Fig 9.3 and 9.4
shows these operation
Figure 9.3 Figure 9.4
10
12. • When the switching frequency is less the than resonant frequency. f𝑠<f𝑟 In the first half
cycle , power delivery is done and in the following cycel freewheeling operation is done.The
converter operates in this mode at lower input voltage, where a step up gain or boost operation
is required.
• When switching frequency is equal as resonant frequency. f𝑠=f𝑟 Each half of the switching
cycle contains a complete power delivery operation, where the resonant half cycle is completed
during the switching half cycle.Now,the resonant tank has unity gain at this frequency and
transfomer taps also designed nominal for this frequency
• When switching frequency is greater than resonant frequency. f𝑠>f𝑟 Each half of the switch-
ing cycle contains a partial power delivery operation.In this mode,the converter operates at higher
input voltage, where a step down gain or buck operation is required.[1]
8. Simulation and Results:
Figure 7: Simulation Diagram on MATLAB
Voltage(V)
time(ms)
15.18 15.26
15.22
-400
0
+400
Figure 8: Output of the Inverter before filter
11
13. time(ms)
Voltage(V)
15.18 15.22 15.26
-400
0
+400
Figure 9: Output of the Inverter after filter
time(ms)
Current(A)
26.47 26.49 26.51
32.5
32.7
32.9
Figure 10: Converter Output current
time(ms)
26.47 26.49 26.51
Voltage(V)
687
689
691
Figure 11: Converter Output Voltage
12
15. Results and Parameters: From the above output waveform Figure 10 it is clear that battery is
charging by the use of LLC resonant converter. Parameters for the converters are following-
Input Parameters Values Input Parameters Values
Input Voltage (V𝑠) 400V Source Internal Resistance (r𝑠) 0 Ω
Battery Rating (E) 360V, 22kW Battery Internal Resistance (r𝐵) 10 Ω
Self Inductance (L𝑚) 172 𝜇H Resonant Tank Inuctance (L𝑟) 34.4 𝜇 H
Resonant Tank Capacitance (C𝑟) 0.6011 𝜇 F Resonant Frequency (f𝑟) 35kHz
Output Capacitance(C𝑜) 60 𝜇 F Ratio parameter (m) 0.6
Table 2: Input Parameters
Sr. No. Output Parameters Values
1 Output Voltage (V𝑜) 689V
2 Output Current (I𝑜) 32.7A
3 Battery Voltage (E) 361.93V
Table 3: Output Parameters
9. Conclusion:
For the applications of inductive charging converter , LLC resonant converter has been used with
a input voltage of 400v and output voltage of around 700 volts to charge a 360V battery. A 400v/720V
transformer is used to boost the voltage to the appropriate level. From table 3, we can conclude that
battery is charging at 32 amps (with initial state of charge = 50%,nominal voltage=350v and 100Ah
capacity) with battery internal voltage of 360V. so, it will take around 3 hrs to get full charge with this
current. From above discussion we can conclude that, a converter is designed to charge the battery by
inductive power transfer.
14
16. 10. References:
1.Resonant LLC Converter: Operation and Design,Application Note AN 2012-09 V1.0 Septem-
ber 2012 250W 33Vin 400Vout Design Example,Infineon Technologies North America (IFNA)
Corp
2.. J. Sallan, J. L. Villa, A. Llombart, and J. F. Sanz, “Optimal Design of ICPT Systems Applied
to Electric Vehicle Battery Charge,” Industrial Electronics, IEEE Transactions on, vol. 56, pp.
2140–2149, 2009.
3. S. Hasanzadeh and S. Vaez-Zadeh, “Resonance based contactless energy transfer,” in Power
Electronics and Drive Systems Technology (PEDSTC), 2012 3rd, 2012, pp. 441–447.
4. S. Hasanzadeh, S. Vaez-Zadeh, and A. H. Isfahani, “Optimization of a Contactless Power
Transfer System for Electric Vehicles,” Vehicular Technology, IEEE Transactions on, vol. 61,
pp. 3566–3573, 2012.
5. Treffers, Menno (2015). ”History, Current Status and Future of the Wireless Power Consor-
tium and the Qi Interface Specification”. IEEE Circuits and Systems Magazine. Vol. 15, no. 2.
pp. 28–31. doi:10.1109/mcas.2015.2418973.
6. US527857A, Maurice Hutin and Maurice Leblanc, ”TRANSFORMER SYSTEM FOR
ELEC- TRIC RAILWAYS”, published 1894-10-23
15