The electronic domain is highly nonlinear, hence it is valuable to study the nonlinear effect particularly the
chaos and bifurcation. The present paper deals with the simulative analysis of nonlinear dynamics in the
boost converter with the help of bifurcation diagrams. In this brief communication, the current through inductor (IL) was considered as state variable and reference current (IREF) was considered as a controlled variable. The capacitor value was varied from 1µf to 50µf while the other parameter was kept unaltered. Itwas observed that, as the value of capacitor was increased, the corresponding period- 1 bifurcation,period- 2 bifurcations, and period- 3 bifurcations points were shifted in incremental order. It was alsoobserved that period- 2 bifurcations, and peri
This document provides an overview of direct current (DC) circuits and circuit analysis techniques. It defines key concepts like voltage sources, current sources, ideal and real sources, and dependent and independent sources. It also explains Kirchhoff's laws, nodal analysis, and mesh analysis. Kirchhoff's current law states that the algebraic sum of currents at a node is zero. Kirchhoff's voltage law states that the algebraic sum of voltages in a closed loop is zero. Nodal analysis uses Kirchhoff's current law to set up equations relating node voltages. Mesh analysis uses Kirchhoff's voltage law to set up equations relating mesh currents.
Electrical elements are conceptual abstractions representing idealized electrical components, such as resistors, capacitors, and inductors, used in the analysis of electrical networks. All electrical networks can be analyzed as multiple electrical elements interconnected by wires.
This chapter provides complete solution of of first, Second order differential equations of series & parallel R-L, R-C, R-L-C circuits, bu using different methods.
This document presents a study on dynamic modeling of flyback switching power supplies using graph modeling for application in variable speed DC drives. It first reviews DC motor speed control using a flyback switching power supply and optimal symmetric controlling method to control the converter's switch-on and switch-off times. It then introduces graph modeling as a precise, simple and efficient method to model DC-to-DC converters to reduce simulation time while maintaining accuracy. The document models a flyback converter using graph modeling and simulates it, finding the modeled simulation takes much less time than simulating the actual converter circuit. It then designs a variable speed DC drive using the flyback converter and controller and models the complete system using graph modeling, verifying the modeled
1) DC circuits can be linear or non-linear depending on whether their parameters such as resistance, inductance, and capacitance remain constant or change with voltage and current.
2) Kirchhoff's laws, including Kirchhoff's current law and Kirchhoff's voltage law, are important laws for analyzing electrical circuits and networks.
3) Circuit analysis methods such as mesh analysis, nodal analysis, and Thevenin's theorem allow circuits to be simplified to aid in calculation of voltage and current.
Ekeeda Provides Online Electrical and Electronics Engineering Degree Subjects Courses, Video Lectures for All Engineering Universities. Video Tutorials Covers Subjects of Mechanical Engineering Degree.
Menuntut ilmu adalah TAQWA - Seeking knowledge is piety.
Menyampaikan ilmu adalah IBADAH - Conveying knowledge is worship.
Mengulang-ulang ilmu adalah ZIKIR - Repeating knowledge is remembrance of God.
Mencari ilmu adalah JIHAD - Seeking knowledge is jihad.
This document provides an overview of direct current (DC) circuits and circuit analysis techniques. It defines key concepts like voltage sources, current sources, ideal and real sources, and dependent and independent sources. It also explains Kirchhoff's laws, nodal analysis, and mesh analysis. Kirchhoff's current law states that the algebraic sum of currents at a node is zero. Kirchhoff's voltage law states that the algebraic sum of voltages in a closed loop is zero. Nodal analysis uses Kirchhoff's current law to set up equations relating node voltages. Mesh analysis uses Kirchhoff's voltage law to set up equations relating mesh currents.
Electrical elements are conceptual abstractions representing idealized electrical components, such as resistors, capacitors, and inductors, used in the analysis of electrical networks. All electrical networks can be analyzed as multiple electrical elements interconnected by wires.
This chapter provides complete solution of of first, Second order differential equations of series & parallel R-L, R-C, R-L-C circuits, bu using different methods.
This document presents a study on dynamic modeling of flyback switching power supplies using graph modeling for application in variable speed DC drives. It first reviews DC motor speed control using a flyback switching power supply and optimal symmetric controlling method to control the converter's switch-on and switch-off times. It then introduces graph modeling as a precise, simple and efficient method to model DC-to-DC converters to reduce simulation time while maintaining accuracy. The document models a flyback converter using graph modeling and simulates it, finding the modeled simulation takes much less time than simulating the actual converter circuit. It then designs a variable speed DC drive using the flyback converter and controller and models the complete system using graph modeling, verifying the modeled
1) DC circuits can be linear or non-linear depending on whether their parameters such as resistance, inductance, and capacitance remain constant or change with voltage and current.
2) Kirchhoff's laws, including Kirchhoff's current law and Kirchhoff's voltage law, are important laws for analyzing electrical circuits and networks.
3) Circuit analysis methods such as mesh analysis, nodal analysis, and Thevenin's theorem allow circuits to be simplified to aid in calculation of voltage and current.
Ekeeda Provides Online Electrical and Electronics Engineering Degree Subjects Courses, Video Lectures for All Engineering Universities. Video Tutorials Covers Subjects of Mechanical Engineering Degree.
Menuntut ilmu adalah TAQWA - Seeking knowledge is piety.
Menyampaikan ilmu adalah IBADAH - Conveying knowledge is worship.
Mengulang-ulang ilmu adalah ZIKIR - Repeating knowledge is remembrance of God.
Mencari ilmu adalah JIHAD - Seeking knowledge is jihad.
This document summarizes a research paper on simulating and investigating the performance of a series active power filter using hysteresis current control.
The paper presents the simulation of a hysteresis current controlled, three-phase series active power filter to improve power quality by compensating for harmonics and reactive power required by a non-linear load. The series active filter employs a simple method for calculating the reference compensation voltage based on p-q theory. The results show the active filter maintains total harmonic distortion well within IEEE standards, providing satisfactory mitigation of harmonics, reactive power compensation, and power factor improvement.
This document provides information on different electrical concepts including:
- Voltage, current, and resistance definitions.
- Electric power formula using voltage, current, energy, and time.
- Active and passive electronic components and their definitions.
- Ohm's law relating voltage, current, and resistance.
- Current and voltage division rules for circuits with parallel and series resistors.
- Ideal and non-ideal voltage and current sources and their characteristics.
- Examples of calculations using the concepts covered.
Analysis of Modulation Strategies for Two-Stage Interleaved Voltage Source In...IJARBEST JOURNAL
This paper deals with the investigation of interleaved voltage source inverter for
photovoltaic applications. This topology focuses on the reduction of inductor current ripple
content, total harmonic distortion (THD) of the proposed topology. In addition, the filter size is
reduced when compared to single-stage voltage source inverter. The design of filter for the
proposed topology is highlighted. The paper discusses the different modulation strategies for the
proposed topology with different values of modulation index. A comparison made between the
different strategies is reported. And comparison is done between single-stage and two-stage
voltage source inverter with chosen modulation strategies. Simulation studies of the proposed VSI
are carried out in MATLAB/SIMULINK.
This document provides an overview of circuit theory concepts including:
- Electric circuits are interconnections of electrical elements.
- Charge is the most basic quantity and is measured in coulombs. Current is the rate of charge flow measured in amperes.
- Voltage is the energy required to move a unit charge through a circuit element and is measured in volts.
- Power is the rate of energy use/production and is measured in watts.
- Circuit elements include passive (resistors, capacitors, inductors) and active (sources) components. Kirchhoff's laws and Ohm's law govern circuit analysis.
- Nodal and mesh analysis provide systematic techniques for analyzing circuits by
1) The document discusses DC fundamentals and circuits, covering topics like charge, current, voltage, power, energy, Ohm's law, and Kirchhoff's laws. It also covers basic circuit analysis using these principles.
2) Key concepts discussed include the definitions of current, voltage, resistance, and time constants. Kirchhoff's laws and Ohm's law are also summarized.
3) Examples are provided to demonstrate using these principles to solve circuits for unknown currents and voltages. Circuit analysis techniques like mesh current analysis and nodal voltage analysis are also mentioned.
Elements of electrical engineering dc circuitsHardik Lathiya
This document provides an overview of elements of electrical engineering, including DC circuits. It discusses common circuit elements like resistors, capacitors, and inductors. It describes their properties and symbols used to represent them in schematics. The document also covers resistor networks and how to calculate equivalent resistances for resistors in series and parallel. Kirchhoff's laws and techniques for solving resistor networks like star-delta transformations are presented. Examples of calculating equivalent resistances and currents in circuits are provided.
International Journal of Engineering Research and DevelopmentIJERD Editor
Electrical, Electronics and Computer Engineering,
Information Engineering and Technology,
Mechanical, Industrial and Manufacturing Engineering,
Automation and Mechatronics Engineering,
Material and Chemical Engineering,
Civil and Architecture Engineering,
Biotechnology and Bio Engineering,
Environmental Engineering,
Petroleum and Mining Engineering,
Marine and Agriculture engineering,
Aerospace Engineering.
This paper presents the three-phase CHB inverter fed induction motor suitable for renewable energy source applications. Normally, all present existing multilevel inverters produce multilevel output, but the number of components required is more, bulk in size, more in cost. Which are more burdens to small capacity renewable sources. These challenges are eliminated in CHB inverter. This CHB mainly consisting of one DC source, one capacitor and eight switches in each phase. To generate a five-level output in phase to ground voltage, it is required to maintain the capacitor voltage (V2) at fifty percent of the DC source voltage (V1). This capacitor voltage is regulated by a sensor less voltage regulating technique. The sensor less voltage regulation works without any sensor devices. We can implement this technique with very less cost compared to other techniques. The sensor less voltage regulation is realized by level-shifted sinusoidal pulse width modulation. The simulation results show a very good dynamic performance. Controller maintains the capacitor voltage at fifty percent of the source voltage irrespective of main source voltage changes and load changes. Inverter generates a five-level wave at the output from line to ground and seven-level wave from line to line with fewer Harmonic. It is implemented in matlab/simulink and showing good dynamic performance.
Presentation about chapter 1 of electrical circuit analysis. standard prefixes. basic terminology power,current,voltage,resistance.How power is absorbed by the circuit and its calculation with passive sign convention.
B tech ee ii_ eee_ u-1_ dc circuit analysis_dipen patelRai University
The document discusses DC circuit analysis and various circuit concepts. It defines a DC circuit as consisting of a conducting loop through which current flows. Common circuit elements like resistors and batteries are described. Kirchhoff's laws of junctions and loops are explained, stating that the algebraic sum of currents at a node equals zero, and the algebraic sum of voltages around a closed loop equals zero. Ideal and dependent voltage and current sources are defined. Nodal and mesh analysis methods for solving circuits are introduced.
The document summarizes a study exploring nonlinear phenomena in a free-running current controlled Cuk converter with both regulated DC and rectified DC inputs. With regulated DC input, the system exhibits stable limit cycles for control parameter values of k=1 and k=4. With rectified DC input, the limit cycles have a different structural pattern and the input voltage ripple is reflected in the output waveforms. For k=4, the inductor currents oscillate at a frequency determined by the equivalent inductance and capacitance values, representing an LC oscillation current.
This document discusses circuit and network theory. It covers topics such as circuit elements and laws, magnetic circuits, network analysis, network theorems, AC circuits and resonance, coupled circuits, transients, two-port networks, and filters. Mesh analysis is introduced as a technique for network analysis that is applicable to planar networks containing voltage sources. The key steps are selecting mesh currents, then writing and solving KVL equations in terms of the unknown currents.
Studynama.com provides free educational resources like lecture notes, presentations, guides and projects for engineering, medical and law students in India. Users can also discuss career prospects and queries in an online community. The site offers downloads on subjects like basic electronics that cover topics such as signals, semiconductors, diodes, transistors, operational amplifiers and digital fundamentals. Diodes allow current to flow easily in one direction when forward biased but restrict it in the reverse direction. The p-n junction forms a potential barrier that controls current flow depending on the bias voltage applied.
This document discusses a five-leg inverter for supplying a five-phase motor. It begins by comparing the voltage, current and power relationships between three-phase and five-phase systems. A five-phase system has higher power output than a three-phase system. It then describes the topology of a five-leg voltage source inverter that can convert DC power to a five-phase AC output. The operation of the five-leg inverter is explained through six switching steps to generate the five-phase output voltages. Governing phasor equations are also provided to define the five-phase output voltages in terms of the input DC voltage and switching frequency.
Abstract: Energy from the sun and the wind can alleviate the pressure on traditional sources that has been considerably depleted. Many stages of renewable energy conversion require DC-DC converters with high voltage gain and high power. The applications where electrical isolation is not necessary, transformer less high gain converters can be used in order to avoid the difficulty of using large capacity transformers. This is a step up resonant converter which can achieve high voltage-gain using LC parallel resonant tank. Zero-voltage-switching (ZVS) of semiconductor devices in a resonant converter can be achieved by resonant devices. It is characterized by ZVS turn-on and nearly ZVS turn-off of main switches. Moreover, the equivalent voltage stress of the semiconductor devices is lower than other resonant step up converters. A resonant converter is simulated using MATLAB/SIMULINK and experimental results are also verified.
Keywords: Frequency Modulation, Resonant Converter, Zero Voltage Switching, Voltage Stress.
Title: Variable Switching Frequency Based Resonant Converter
Author: Anooja Shahul, Prof. Annie P Oommen, Prof. Sera Mathew
ISSN 2349-7815
International Journal of Recent Research in Electrical and Electronics Engineering (IJRREEE)
Paper Publications
A Three Level Single Stage PFC Converter for Variable Power Applicationspaperpublications3
Abstract: AC/DC power converters are required to operate with high power factor (PF) and low total harmonic distortion (THD) for improved grid quality and full capacity utilization of the transmission lines. Passive PF correction (PFC) circuits consist of inductive and capacitive filters followed by a diode bridge. They provide the simplest way of achieving high PF with high efficiency; however, they require low line frequency filters which are bulky and heavy. This work presents a new single stage three level isolated AC/DC PFC converter for high DC link voltage low-power applications achieved through an effective integration of AC/DC and DC/DC stages where all of the switches are shared between two operations. With the converter and switching scheme, input current shaping and output voltage regulation can be achieved simultaneously without introducing additional switches or switching actions. Due to the flexible DC link voltage structure, high power factor can be achieved at high line voltage. The performance of the single stage PFC converter is simulated in MATLAB/SIMULINK environment.
Keywords: Power Factor (PF), DC Link Voltage, Power Factor Correction Circuits (PFC).
Title: A Three Level Single Stage PFC Converter for Variable Power Applications
Author: Litty Joseph, Prof. Neetha John, Prof. Emmanuel Babu P
ISSN 2349-7815
International Journal of Recent Research in Electrical and Electronics Engineering (IJRREEE)
Paper Publications
SIMULATIVE STUDY OF NONLINEAR DYNAMICS IN SINGLE STAGE BOOST CONVERTERijccmsjournal
The nonlinear dynamics such as bifurcation and chaos has got lot of attention in research fraternity. The power electronics is a dynamic and nonlinear field in which chaos plays an important role. The time dynamic and nonlinearity is cannot be neglected or it is default case in power electronics. The present paper discusses the simulative study of Bifurcation and chaotic behaviour in the single stage boost converter with the help of bifurcation diagram. It is also confer the parameter variation and its respective effect on bifurcation diagram and stability.
2313ijccms05SIMULATIVE STUDY OF NONLINEAR DYNAMICS IN SINGLE STAGE BOOST CONV...ijccmsjournal
The nonlinear dynamics such as bifurcation and chaos has got lot of attention in research fraternity. The power electronics is a dynamic and nonlinear field in which chaos plays an important role. The time dynamic and nonlinearity is cannot be neglected or it is default case in power electronics. The present paper discusses the simulative study of Bifurcation and chaotic behaviour in the single stage boost converter with the help of bifurcation diagram. It is also confer the parameter variation and its respective effect on bifurcation diagram and stability.
SIMULATIVE STUDY OF NONLINEAR DYNAMICS IN SINGLE STAGE BOOST CONVERTERijccmsjournal
The nonlinear dynamics such as bifurcation and chaos has got lot of attention in research fraternity. The
power electronics is a dynamic and nonlinear field in which chaos plays an important role. The time
dynamic and nonlinearity is cannot be neglected or it is default case in power electronics. The present
paper discusses the simulative study of Bifurcation and chaotic behaviour in the single stage boost
converter with the help of bifurcation diagram. It is also confer the parameter variation and its respective
effect on bifurcation diagram and stability.
Soft Computing Technique for the Control of Triple-Lift Luo ConverterIJERA Editor
Positive output Luo converters are a series of new DC-DC step-up (boost) converters, which were developed from prototypes using voltage lift technique. These converters perform positive to positive DC-DC voltage increasing conversion with high power density, high efficiency and cheap topology in simple structure. They are different from other existing DC-DC step-up converters with a high output voltage and small ripples. Triple lift LUO circuit is derived from positive output elementary Luo converter by adding the lift circuit three times. Due to the time varying and switching nature of the Luo converters, their dynamic behaviour becomes highly nonlinear. The classical control methods employed to design the controllers for Luo converters depend on the operating point so that it is very difficult to select control parameters because of the presence of parasitic elements, time varying loads and variable supply voltages. Conventional controllers require a good knowledge of the system and accurate tuning in order to obtain the desired performances. A fuzzy logic controller is a soft computing technique which neither requires a precise mathematical model of the system nor complex computations. The performances of the Triple-lift Luo converter with fuzzy logic controller are evaluated under line and load disturbances using Matlab-Simulink based simulation. The results are presented and analyzed.
In this paper a transistor open-circuit fault diagnosis problem in two-level voltage inverter controlled shunt active power filter drives was discussed. Taking into consideration requirements of the contemporary monitoring drive systems original transistor fault diagnostic technique were proposed. Presented results were obtained by designed in PSIM software simulation model.
This document summarizes a research paper on simulating and investigating the performance of a series active power filter using hysteresis current control.
The paper presents the simulation of a hysteresis current controlled, three-phase series active power filter to improve power quality by compensating for harmonics and reactive power required by a non-linear load. The series active filter employs a simple method for calculating the reference compensation voltage based on p-q theory. The results show the active filter maintains total harmonic distortion well within IEEE standards, providing satisfactory mitigation of harmonics, reactive power compensation, and power factor improvement.
This document provides information on different electrical concepts including:
- Voltage, current, and resistance definitions.
- Electric power formula using voltage, current, energy, and time.
- Active and passive electronic components and their definitions.
- Ohm's law relating voltage, current, and resistance.
- Current and voltage division rules for circuits with parallel and series resistors.
- Ideal and non-ideal voltage and current sources and their characteristics.
- Examples of calculations using the concepts covered.
Analysis of Modulation Strategies for Two-Stage Interleaved Voltage Source In...IJARBEST JOURNAL
This paper deals with the investigation of interleaved voltage source inverter for
photovoltaic applications. This topology focuses on the reduction of inductor current ripple
content, total harmonic distortion (THD) of the proposed topology. In addition, the filter size is
reduced when compared to single-stage voltage source inverter. The design of filter for the
proposed topology is highlighted. The paper discusses the different modulation strategies for the
proposed topology with different values of modulation index. A comparison made between the
different strategies is reported. And comparison is done between single-stage and two-stage
voltage source inverter with chosen modulation strategies. Simulation studies of the proposed VSI
are carried out in MATLAB/SIMULINK.
This document provides an overview of circuit theory concepts including:
- Electric circuits are interconnections of electrical elements.
- Charge is the most basic quantity and is measured in coulombs. Current is the rate of charge flow measured in amperes.
- Voltage is the energy required to move a unit charge through a circuit element and is measured in volts.
- Power is the rate of energy use/production and is measured in watts.
- Circuit elements include passive (resistors, capacitors, inductors) and active (sources) components. Kirchhoff's laws and Ohm's law govern circuit analysis.
- Nodal and mesh analysis provide systematic techniques for analyzing circuits by
1) The document discusses DC fundamentals and circuits, covering topics like charge, current, voltage, power, energy, Ohm's law, and Kirchhoff's laws. It also covers basic circuit analysis using these principles.
2) Key concepts discussed include the definitions of current, voltage, resistance, and time constants. Kirchhoff's laws and Ohm's law are also summarized.
3) Examples are provided to demonstrate using these principles to solve circuits for unknown currents and voltages. Circuit analysis techniques like mesh current analysis and nodal voltage analysis are also mentioned.
Elements of electrical engineering dc circuitsHardik Lathiya
This document provides an overview of elements of electrical engineering, including DC circuits. It discusses common circuit elements like resistors, capacitors, and inductors. It describes their properties and symbols used to represent them in schematics. The document also covers resistor networks and how to calculate equivalent resistances for resistors in series and parallel. Kirchhoff's laws and techniques for solving resistor networks like star-delta transformations are presented. Examples of calculating equivalent resistances and currents in circuits are provided.
International Journal of Engineering Research and DevelopmentIJERD Editor
Electrical, Electronics and Computer Engineering,
Information Engineering and Technology,
Mechanical, Industrial and Manufacturing Engineering,
Automation and Mechatronics Engineering,
Material and Chemical Engineering,
Civil and Architecture Engineering,
Biotechnology and Bio Engineering,
Environmental Engineering,
Petroleum and Mining Engineering,
Marine and Agriculture engineering,
Aerospace Engineering.
This paper presents the three-phase CHB inverter fed induction motor suitable for renewable energy source applications. Normally, all present existing multilevel inverters produce multilevel output, but the number of components required is more, bulk in size, more in cost. Which are more burdens to small capacity renewable sources. These challenges are eliminated in CHB inverter. This CHB mainly consisting of one DC source, one capacitor and eight switches in each phase. To generate a five-level output in phase to ground voltage, it is required to maintain the capacitor voltage (V2) at fifty percent of the DC source voltage (V1). This capacitor voltage is regulated by a sensor less voltage regulating technique. The sensor less voltage regulation works without any sensor devices. We can implement this technique with very less cost compared to other techniques. The sensor less voltage regulation is realized by level-shifted sinusoidal pulse width modulation. The simulation results show a very good dynamic performance. Controller maintains the capacitor voltage at fifty percent of the source voltage irrespective of main source voltage changes and load changes. Inverter generates a five-level wave at the output from line to ground and seven-level wave from line to line with fewer Harmonic. It is implemented in matlab/simulink and showing good dynamic performance.
Presentation about chapter 1 of electrical circuit analysis. standard prefixes. basic terminology power,current,voltage,resistance.How power is absorbed by the circuit and its calculation with passive sign convention.
B tech ee ii_ eee_ u-1_ dc circuit analysis_dipen patelRai University
The document discusses DC circuit analysis and various circuit concepts. It defines a DC circuit as consisting of a conducting loop through which current flows. Common circuit elements like resistors and batteries are described. Kirchhoff's laws of junctions and loops are explained, stating that the algebraic sum of currents at a node equals zero, and the algebraic sum of voltages around a closed loop equals zero. Ideal and dependent voltage and current sources are defined. Nodal and mesh analysis methods for solving circuits are introduced.
The document summarizes a study exploring nonlinear phenomena in a free-running current controlled Cuk converter with both regulated DC and rectified DC inputs. With regulated DC input, the system exhibits stable limit cycles for control parameter values of k=1 and k=4. With rectified DC input, the limit cycles have a different structural pattern and the input voltage ripple is reflected in the output waveforms. For k=4, the inductor currents oscillate at a frequency determined by the equivalent inductance and capacitance values, representing an LC oscillation current.
This document discusses circuit and network theory. It covers topics such as circuit elements and laws, magnetic circuits, network analysis, network theorems, AC circuits and resonance, coupled circuits, transients, two-port networks, and filters. Mesh analysis is introduced as a technique for network analysis that is applicable to planar networks containing voltage sources. The key steps are selecting mesh currents, then writing and solving KVL equations in terms of the unknown currents.
Studynama.com provides free educational resources like lecture notes, presentations, guides and projects for engineering, medical and law students in India. Users can also discuss career prospects and queries in an online community. The site offers downloads on subjects like basic electronics that cover topics such as signals, semiconductors, diodes, transistors, operational amplifiers and digital fundamentals. Diodes allow current to flow easily in one direction when forward biased but restrict it in the reverse direction. The p-n junction forms a potential barrier that controls current flow depending on the bias voltage applied.
This document discusses a five-leg inverter for supplying a five-phase motor. It begins by comparing the voltage, current and power relationships between three-phase and five-phase systems. A five-phase system has higher power output than a three-phase system. It then describes the topology of a five-leg voltage source inverter that can convert DC power to a five-phase AC output. The operation of the five-leg inverter is explained through six switching steps to generate the five-phase output voltages. Governing phasor equations are also provided to define the five-phase output voltages in terms of the input DC voltage and switching frequency.
Abstract: Energy from the sun and the wind can alleviate the pressure on traditional sources that has been considerably depleted. Many stages of renewable energy conversion require DC-DC converters with high voltage gain and high power. The applications where electrical isolation is not necessary, transformer less high gain converters can be used in order to avoid the difficulty of using large capacity transformers. This is a step up resonant converter which can achieve high voltage-gain using LC parallel resonant tank. Zero-voltage-switching (ZVS) of semiconductor devices in a resonant converter can be achieved by resonant devices. It is characterized by ZVS turn-on and nearly ZVS turn-off of main switches. Moreover, the equivalent voltage stress of the semiconductor devices is lower than other resonant step up converters. A resonant converter is simulated using MATLAB/SIMULINK and experimental results are also verified.
Keywords: Frequency Modulation, Resonant Converter, Zero Voltage Switching, Voltage Stress.
Title: Variable Switching Frequency Based Resonant Converter
Author: Anooja Shahul, Prof. Annie P Oommen, Prof. Sera Mathew
ISSN 2349-7815
International Journal of Recent Research in Electrical and Electronics Engineering (IJRREEE)
Paper Publications
A Three Level Single Stage PFC Converter for Variable Power Applicationspaperpublications3
Abstract: AC/DC power converters are required to operate with high power factor (PF) and low total harmonic distortion (THD) for improved grid quality and full capacity utilization of the transmission lines. Passive PF correction (PFC) circuits consist of inductive and capacitive filters followed by a diode bridge. They provide the simplest way of achieving high PF with high efficiency; however, they require low line frequency filters which are bulky and heavy. This work presents a new single stage three level isolated AC/DC PFC converter for high DC link voltage low-power applications achieved through an effective integration of AC/DC and DC/DC stages where all of the switches are shared between two operations. With the converter and switching scheme, input current shaping and output voltage regulation can be achieved simultaneously without introducing additional switches or switching actions. Due to the flexible DC link voltage structure, high power factor can be achieved at high line voltage. The performance of the single stage PFC converter is simulated in MATLAB/SIMULINK environment.
Keywords: Power Factor (PF), DC Link Voltage, Power Factor Correction Circuits (PFC).
Title: A Three Level Single Stage PFC Converter for Variable Power Applications
Author: Litty Joseph, Prof. Neetha John, Prof. Emmanuel Babu P
ISSN 2349-7815
International Journal of Recent Research in Electrical and Electronics Engineering (IJRREEE)
Paper Publications
SIMULATIVE STUDY OF NONLINEAR DYNAMICS IN SINGLE STAGE BOOST CONVERTERijccmsjournal
The nonlinear dynamics such as bifurcation and chaos has got lot of attention in research fraternity. The power electronics is a dynamic and nonlinear field in which chaos plays an important role. The time dynamic and nonlinearity is cannot be neglected or it is default case in power electronics. The present paper discusses the simulative study of Bifurcation and chaotic behaviour in the single stage boost converter with the help of bifurcation diagram. It is also confer the parameter variation and its respective effect on bifurcation diagram and stability.
2313ijccms05SIMULATIVE STUDY OF NONLINEAR DYNAMICS IN SINGLE STAGE BOOST CONV...ijccmsjournal
The nonlinear dynamics such as bifurcation and chaos has got lot of attention in research fraternity. The power electronics is a dynamic and nonlinear field in which chaos plays an important role. The time dynamic and nonlinearity is cannot be neglected or it is default case in power electronics. The present paper discusses the simulative study of Bifurcation and chaotic behaviour in the single stage boost converter with the help of bifurcation diagram. It is also confer the parameter variation and its respective effect on bifurcation diagram and stability.
SIMULATIVE STUDY OF NONLINEAR DYNAMICS IN SINGLE STAGE BOOST CONVERTERijccmsjournal
The nonlinear dynamics such as bifurcation and chaos has got lot of attention in research fraternity. The
power electronics is a dynamic and nonlinear field in which chaos plays an important role. The time
dynamic and nonlinearity is cannot be neglected or it is default case in power electronics. The present
paper discusses the simulative study of Bifurcation and chaotic behaviour in the single stage boost
converter with the help of bifurcation diagram. It is also confer the parameter variation and its respective
effect on bifurcation diagram and stability.
Soft Computing Technique for the Control of Triple-Lift Luo ConverterIJERA Editor
Positive output Luo converters are a series of new DC-DC step-up (boost) converters, which were developed from prototypes using voltage lift technique. These converters perform positive to positive DC-DC voltage increasing conversion with high power density, high efficiency and cheap topology in simple structure. They are different from other existing DC-DC step-up converters with a high output voltage and small ripples. Triple lift LUO circuit is derived from positive output elementary Luo converter by adding the lift circuit three times. Due to the time varying and switching nature of the Luo converters, their dynamic behaviour becomes highly nonlinear. The classical control methods employed to design the controllers for Luo converters depend on the operating point so that it is very difficult to select control parameters because of the presence of parasitic elements, time varying loads and variable supply voltages. Conventional controllers require a good knowledge of the system and accurate tuning in order to obtain the desired performances. A fuzzy logic controller is a soft computing technique which neither requires a precise mathematical model of the system nor complex computations. The performances of the Triple-lift Luo converter with fuzzy logic controller are evaluated under line and load disturbances using Matlab-Simulink based simulation. The results are presented and analyzed.
In this paper a transistor open-circuit fault diagnosis problem in two-level voltage inverter controlled shunt active power filter drives was discussed. Taking into consideration requirements of the contemporary monitoring drive systems original transistor fault diagnostic technique were proposed. Presented results were obtained by designed in PSIM software simulation model.
This document provides details on an experiment conducted on Chua's circuit, a chaotic electronic circuit. The document includes:
1) An introduction describing Chua's circuit and the goal of studying its synchronization properties.
2) A literature review covering the history of chaos theory and key discoveries like the Lorenz attractor.
3) A theoretical overview of the differential equations that model Chua's circuit and how it was implemented in MATLAB.
4) Experimental results from building and testing a physical Chua's circuit, including how its behavior changes with adjustments to resistor values.
5) Analysis of controlling and synchronizing the circuit by addressing factors like component tolerances that influence its chaotic behavior.
A simple, non-feedback method of controlling chaos is implemented for a DC-DC converter. The weak periodic perturbation (WPP) is the control technique applied to stabilize an unstable orbit in a current-mode controlled Positive Output Luo (POL) DC-DC converter operating in a chaotic regime. With WPP, the operation of the converter is limited to stable period-1 orbit that exists in the original chaotic attractor. The proposed control strategy is implemented using simulations and the results are verified with hardware setup. The experimental results of the converter with WPP control are presented which shows the effectiveness of the control strategy.
Power Quality Indices for Electrical Power Systems under Non-Stationary Distu...KonstantinosChristod10
This paper presents a methodology to evaluate power quality indices using Wavelet Packet Transform in electrical power systems, in the presence of harmonics, under stationary, non-stationary and short-circuit occurrence conditions, in order to achieve efficient monitoring of power systems. Results on several test systems and various disturbances simulated by Matlab/Simulink demonstrate the effectiveness and robustness of the proposed method.
This project envisages a Buck dc – dc
converter mathematical analysis and simulation. This power
regulator is made up of some vital circuit elements such as
inductor, freewheeling diode, filter capacitor and electronics
power switch. The circuit is analysed based on two modes of
operation namely: continuous current conduction mode and
discontinuous current mode. Ansoft Simplorer software is
used to carry out the circuit simulation under the two modes
of operation which aided in verifying the calculated results.
Both calculated and simulated waveforms are displayed. The
results obtained are very similar.
Performance analysis of multiple energy storage element resonant power conver...asokan2k7
This document presents a performance analysis of a Multiple Energy Storage Element Resonant Power Converter with an LCLC configuration. It begins with an abstract summarizing the study of a proposed open loop LCLC converter. It then provides background on resonant converters and multiple energy storage element converters. The document establishes a state-space model and equations for the proposed LCLC converter. Finally, it presents simulation results demonstrating zero voltage switching, zero current switching, and steady-state output voltage and current waveforms for validation of the converter's operation.
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Abstract: An Interleaved Buck Converter (IBC) with continuous input current, extremely low output current ripple, low switching losses and improved step-down conversion ratio is presented in this work. The new interleaved buck converter has lower voltage stress in comparison to the conventional IBC and also can provide a high step-down ratio which makes it a proper choice for high power applications. Also new interleaved buck converter can provide current-sharing between two interleaved modules without using additional current-sharing control method. The new interleaved buck converter is simulated by using MATLAB/Simulink and the experimental results can be obtained.
Keywords: Two Phase Interleaved Buck Converter, Continuous Conduction Mode, low switching voltage stress.
Title: Comparative Study of Interleaved Buck Converters
Author: Vinny Babu, Prof. Ninu Joy, Prof. Honey Susan Eldo
ISSN 2349-7815
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This paper analyses the nonlinear phenomena in current mode controlled buck-boost converter. The system undergoes various operating regions whenever there is a change in non linear elements presented in the system as well as in the loads. In this work, inductor current is considered as the reference for analysis.The results show that the converter enters into period-1, periodic doubling and chaotic regions as per the parameter (IL) variations. The proposed control strategy, weak periodic perturbation (WPP) method tries to stabilize the system from the chaotic behavior.The buck boost converter along with the control system is simulated using MATLAB/SIMULINK software tool and the results are presented.The hardware implementation of the system is done and the results are verified with the simulation results. It shows that the WPP can transform the system behaviour from the chaotic region to the periodic one.
This document analyzes and designs an LCL resonant converter as a constant current source for capacitor charging applications. It proposes the LCL resonant converter topology, analyzes its operation mathematically, simulates its performance, and discusses the design process. The key findings are that the LCL resonant converter can provide a load-independent output current and behave as a true constant current source for capacitor charging when certain design parameters are met. Simulation results confirm the converter's ability to smoothly charge a capacitor with a constant output current.
This document presents an analysis and design of an LCL resonant converter as a constant current source for capacitor charging applications. The proposed converter topology is analyzed mathematically to derive expressions for voltage and current gains. Key findings are that the converter can operate as a constant current source when the switching frequency equals the resonant frequency. Simulation results confirm that the output current is independent of load and the charging profile is smooth using the proposed LCL resonant converter design. The converter is suitable for applications requiring constant current such as capacitor charging.
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INVESTIGATION OF NONLINEAR DYNAMICS IN THE BOOST CONVERTER: EFFECT OF CAPACITANCE VARIATIONS
1. International Journal on Computational Sciences & Applications (IJCSA) Vol.5, No.3, June 2015
DOI:10.5121/ijcsa.2015.5306 67
INVESTIGATION OF NONLINEAR
DYNAMICS IN THE BOOST CONVERTER:
EFFECT OF CAPACITANCE VARIATIONS
T. D. Dongale
Computational Electronics and Nanoscience Research Laboratory,
School of Nanoscience and Biotechnology,
Shivaji University, Kolhapur (M.S), India
ABSTRACT
The electronic domain is highly nonlinear, hence it is valuable to study the nonlinear effect particularly the
chaos and bifurcation. The present paper deals with the simulative analysis of nonlinear dynamics in the
boost converter with the help of bifurcation diagrams. In this brief communication, the current through
inductor (IL) was considered as state variable and reference current (IREF) was considered as a controlled
variable. The capacitor value was varied from 1µf to 50µf while the other parameter was kept unaltered. It
was observed that, as the value of capacitor was increased, the corresponding period- 1 bifurcation,
period- 2 bifurcations, and period- 3 bifurcations points were shifted in incremental order. It was also
observed that period- 2 bifurcations, and period- 3 bifurcations points were vanished with an increasing
capacitor value (C) and supply voltage (VIN).
KEYWORDS: BIFURCATION, BOOST CONVERTER, CHAOS, NONLINEAR EFFECT
1.INTRODUCTION
The nonlinear dynamics has many applications and hence it is widely investigated in many fields
of science and engineering domains. The nonlinearity depends on all state variables of physical
system. The nonlinearity produces a chaos which is due to initial condition problems and
sensitivity to these conditions. The first kind of nonlinearity and particularly chaotic effect was
observed to the Henri Poincaré on celestial mechanics around 1900 [1]. In 1963 Lorenz gave an
idea that simple nonlinear systems can have complex, chaotic behaviour in his seminal research
paper ‘Deterministic Non-periodic Flow’ [1]. The electronics’ field is very dynamic hence it is
valuable to study nonlinear effect for better understanding of the subject.
The Van der Pol first of all shows that the nonlinear dynamic behaviours in the field of
electronics [2]. Soon after, many researchers found out the nonlinear effect such as bifurcation
and chaos in many electronic circuits topologies. The power converters got a lot of attention
between all of them. In 1980, Ballieul et al gave the idea about chaotic behaviour in DC-DC
converter [3]. Parui et al give the idea of bifurcations in the boost converter [4]. Deane et al
emphasized their studies on instability, sub-harmonics and chaos in power electronic systems [5].
Chan et al showed the quasi-periodicity to period-doubling bifurcations in the boost converter [6].
Dongale et al shows the chaotic behaviour of boost converter using bifurcation diagram [7]. Lu et
al studied the bifurcation phenomena in parallel-connected boost converter system [8]. L. Chua’s
et al work on nonlinear circuits (Chua’s Circuit) based on capacitor and diode which is very
2. International Journal on Computational Sciences & Applications (IJCSA) Vol.5, No.3, June 2015
68
famous in electronics today [9]. The Chua’s diode is now famous with the name ‘Memristor’ [10-
14].
The boost converter is also known as step up converter whose primary aim is to increase the
average output voltage higher than input voltage or supply voltage [15-17]. The present paper
investigated the chaotic effect in the boost converter with the help of bifurcation diagram. This
work is aims to study the stability of the system using bifurcation diagram. Rest of paper is
portrayed as follows, after brief introduction in the first section, the second section deals with
introduction of chaos and bifurcation. Third section describes the working of boost converter. The
fourth section deals with the chaos and bifurcation analysis. At the end results are reported.
2.NONLINEAR DYNAMICS
The study of nonlinear dynamics has come into game when Newton invented the differential
equations. He solved the classical two body problems with the help of differential equations, but
the classical three body problems cannot be solved with the help of Newton’s numerical method.
The breakthrough came when Poincaré found that celestial mechanics for highly nonlinear
systems [18].
The Bifurcation theory was introduced by Henri Poincare and chaos theory was proposed by
Edward Lorenz. The chaos is occurs due to the initial condition problem and discreteness of state
variables. The chaos is a very robust phenomenon and a few years ago it was treated as only
noise. The major breakthrough came when Edward Lorenz model the weather and formulate the
Butterfly Effect. The butterfly effect says that if we make small change in any of the state variable
of system then it is impossible to predict the final outcome of system i.e. small variation can
become a large diversion [19]. Bifurcation phenomenon has two types, first is smooth bifurcation
phenomenon and other is border collision bifurcation phenomenon [7, 20].
Each of the bifurcations may give rise to a distinct route to chaos if the bifurcations appear
repeatedly upon changing the bifurcation parameter [21]. In the state control space, the place at
which bifurcations occur are called bifurcation points [19]. Many times, it is possible to predict
the system stability with the help of equilibrium, periodic, quasi-periodic, and chaotic behaviors
of bifurcations diagrams. The present paper was aimed to find out system stability with the help
of bifurcations diagrams. In the present study, bifurcation diagram for Inductor Current (IL) with
reference current (IREF) are plotted. The inductor (IL) current worked as a state variable and the
reference current (IREF) is worked as a controlled variable [7]. The effects on stability by means of
variation of capacitor value are depicted for each case. The period- 1, 2 and 3 bifurcations points
are shown by solid lines in the figure 2 to 5 respectively. The linear and steady-state performance
of converters and electric controls were investigated by conventional means [22-31], but
nonlinear aspects and dynamic behaviour of converter was not studied and examined at its large.
3.BOOST CONVERTER
The boost converter regulates the average output voltage to higher than input voltage or supply
voltage hence it is known as step up DC-DC converter or DC amplifier. The typical DC to DC
boost converter is shown in fig. 1. The output voltage of boost converter is controlled by
controlling the duty cycle of MOSFET. The boost converter increases the magnitude of output
voltage by using energy storing principle in the inductor and capacitor. These lumped circuit
components are responsible for the nonlinear dynamic behaviour in the boost converter. The
detailed working of boost converter can be found in the reference [7].
3. International Journal on Computational Sciences & Applications (IJCSA) Vol.5, No.3, June 2015
69
Figure 1: The DC-DC Boost converter. The circuit diagram consist of DC supply (VIN), Inductor
in series (L), MOSFET as a switch, Diode (D), Capacitor (C) and Load resistance (RL) [7].
The state dynamics or equations of boost converter are given as, [32-33]
ܸ݀
݀ݐ
= -
1
ܴܥ
ܸo
(For nT ≤ t < (n + d) T) ………… (1)
݀݅
݀ݐ
= -
1
ܮ
ܸin
ܸ݀
݀ݐ
= -
1
ܴܥ
ܸ +
1
ܥ
݅
(For (n + d) T ≤ t < (n + 1) T) ...………. (2)
݀݅
݀ݐ
= -
1
ܮ
ܸo +
1
ܮ
ܸin
Where, V0 is the output voltage, VIN supply voltage, d is the duty cycle and n is an integer.
4.INVESTIGATIONS OF CHAOTIC AND BIFURCATION
PHENOMENA IN BOOST CONVERTER
The nonlinear dynamic of boost converter was observed using bifurcation diagram. The following
figures (2-5) show the variation of capacitor (C) as well as supply voltage (VIN) and
corresponding effect on bifurcations diagrams of single stage boost converter. The value of
capacitor (C) is varied from 1 µf to 50 µf and the value of supply voltage (VIN) is varied from 5V
to 20V. The figure 2 (A, B, C and D) is for supply voltage (VIN) 5V and remaining figure 3, 4 and
5 shows the performance of boost converter at supply voltage (VIN) 10V, 15V and 20V
respectively. For this simulation series inductor considered as 2 mH, load resistance (RL)
considered as 20 , and switching frequency is considered as 10 KHz.
4. International Journal on Computational Sciences & Applications (IJCSA) Vol.5, No.3, June 2015
70
Figure 2 (A, B, C, D, E and F): Bifurcation diagram for Inductor Current (IL) with reference
current (IREF). Here the capacitor (C) is varied and other parameters are kept fixed. The figures A,
B, C, D, E and F represent the variations in the capacitor value viz. A= 1µf, B= 10µf, C= 20µf,
D= 30µf, E= 40µf and F= 50µf respectively at supply voltage (VIN) equals to 5V. The red solid
line A, B and C represent the period- 1, 2 and period- 3 bifurcation respectively.
5. International Journal on Computational Sciences & Applications (IJCSA) Vol.5, No.3, June 2015
71
Figure 3 (A, B, C, D, E and F): Bifurcation diagram for Inductor Current (IL) with reference
current (IREF). Here the capacitor (C) is varied and other parameters are kept fixed. The figures A,
B, C, D, E and F represent the variations in the capacitor value viz. A= 1µf, B= 10µf, C= 20µf,
D= 30µf, E= 40µf and F= 50µf respectively at supply voltage (VIN) equals to 10V. The blue solid
line A, B and C represent the period- 1, 2 and period- 3 bifurcation respectively.
6. International Journal on Computational Sciences & Applications (IJCSA) Vol.5, No.3, June 2015
72
Figure 4 (A, B, C, D, E and F): Bifurcation diagram for Inductor Current (IL) with reference
current (IREF). Here the capacitor (C) is varied and other parameters are kept fixed. The figures A,
B, C, D, E and F represent the variations in the capacitor value viz. A= 1µf, B= 10µf, C= 20µf,
D= 30µf, E= 40µf and F= 50µf respectively at supply voltage (VIN) equals to 15V. The black
solid line A, B and C represent the period- 1, 2 and period- 3 bifurcation respectively.
7. International Journal on Computational Sciences & Applications (IJCSA) Vol.5, No.3, June 2015
73
Figure 5 (A, B, C, D, E and F): Bifurcation diagram for Inductor Current (IL) with reference
current (IREF). Here the capacitor (C) is varied and other parameters are kept fixed. The figures A,
B, C, D, E and F represent the variations in the capacitor value viz. A= 1µf, B= 10µf, C= 20µf,
D= 30µf, E= 40µf and F= 50µf respectively at supply voltage (VIN) equals to 20V. The red solid
line A, B and C represent the period- 1, 2 and period- 3 bifurcation respectively.
9. International Journal on Computational Sciences & Applications (IJCSA) Vol.5, No.3, June 2015
75
5.RESULT AND DISCUSSION
In this study, the chaotic effect of boost converter was investigated by means of bifurcation
diagram. Table 2 represents the relationship between period-bifurcation and corresponding effect
on controlled variable IREF and state variable IL with variations of capacitor value (1µf to 50µf)
and supply voltage (VIN= 5V to 20V). Over the period- 1 bifurcation point, inductor current (IL)
having single unique value for turn on the switch. For period- 2 bifurcations there are two values
of inductor current (IL) to turn on the switch. As we go further, the system undergoes stable
period-3 operation, and eventually becomes chaotic.
It is clearly seen from fig. 2 to fig. 5 and table 2, that single stage boost converter degrades its
stability at low voltage and at low value of capacitor. It is clearly shown from fig. 2-5 that
bifurcation points are shifted in increment order as we increase the value of capacitor and it
become chaotic after period- 3 bifurcations in each case. The simulation results of boost converter
also showed that the existence of only one stable point at higher value of capacitor (C) and higher
valve of supply voltage (VIN). The period- 3 bifurcation vanishes from 20 µf and the period- 2
bifurcation vanishes from 30 µf. In this case, region above the period-3 bifurcation is a chaotic
region for the boost converter.
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405-408.
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