The aim of this paper to presents a comparative analysis of Voltage Source
Inverter using Sinusoidal Pulse Width Modulation Method, Third Harmonic
Injection Pulse Width Modulation Method and Space Vector Pulse Width
Modulation Two level inverter for Induction Motor. In this paper we have
designed the Simulink model of Inverter for different technique. An above
technique is used to reduce the Total Harmonic Distortion (THD) on the AC
side of the Inverter. The Simulink model is close loop. Results are analyzed
using Fast Fourier Transformation (FFT) which is for analysis of the Total
Harmonic Distortion. All simulations are performed in the MATLAB
Simulink / Simulink environment of MATLAB.
Space Vector Modulation with DC-Link Voltage Balancing Control for Three-Leve...IDES Editor
Modified space vector modulation (SVM) for
DC-link voltage balancing of three-level inverter is proposed
here. Effect of the DC-link capacitor voltage deviation on
inverter switching states is presented for three-level
inverter. Pulse pattern arrangements for proposed SVM
using degree of freedom available in choice of redundant
space vectors, sequencing of vectors, and splitting of duty
cycles of vector are best exploited. Seven-segment SVM
scheme and modified closed loop space vector DC-link
voltage balancing control schemes are implemented. The
effectiveness of proposed scheme is verified by simulations
and experimental verification on laboratory prototype.
A Refined Space Vector PWM Signal Generation for Multilevel InvertersIDES Editor
A refined space vector modulation scheme for
multilevel inverters, using only the instantaneous sampled
reference signals is presented in this paper. The proposed
space vector pulse width modulation technique does not require
the sector information and look-up tables to select the
appropriate switching vectors. The inverter leg switching times
are directly obtained from the instantaneous sampled
reference signal amplitudes and centers the switching times
for the middle space vectors in a sampling time interval, as in
the case of conventional space vector pulse width modulation.
The simulation results are presented to a five-level inverter
system for dual-fed induction motor drive. The dual-fed
structure is realized by opening the neutral-point of the
conventional squirrel cage induction motor. The five-level
inversion is obtained by feeding the dual-fed induction motor
with four-level inverter from one end and two-level inverter
from the other end.
The peer-reviewed International Journal of Engineering Inventions (IJEI) is started with a mission to encourage contribution to research in Science and Technology. Encourage and motivate researchers in challenging areas of Sciences and Technology.
Fast svm based 3 phase cascaded five level invertereSAT Journals
Abstract Introduction of nearest three vector algorithm is a major achievement in the area of space vector technology. Complexity and severe computations are still the drawbacks of SVM methods mainly for multilevel inverter applications. A fast SVM technique is introduced in this project which allows the calculation of switch time duration and the efficient determination of switching times based on the two level inverter scheme. SVM modulating waves are generated based on the two level system and then this modulating waves are compared with required number of carrier signals in order to generate the switching pulses for the inverter. Four triangular carrier signals are needed for a five level system in order to generate the switching pulses. Coordinates of the nearest three voltage vectors is not needed, so the complexity of the SVM technique can be reduced and it is the major advantage of the proposed technique compared with conventional SVM techniques used for multilevel inverters. A three phase five level cascaded H bridge topology is used here to verify the effectiveness of the proposed technique. MATLAB simulation and hardware implementation of the proposed system is done. From the analysis of both simulation and hardware it is clear that proposed SVM technique have more fundamental output and less THD than sinusoidal PWM technique. Key Words: Cascaded H bridge, Multilevel, Modulating wave, Space vector
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
Simplified svpwm algorithm for neutral point clamped 3 level inverter fed dtc...Asoka Technologies
In this paper, a simplified space vector pulse width modulation (SVPWM) method has been developed for three phase three-level voltage source inverter fed to direct torque controlled (DTC) induction motor drive. The space vector diagram of three-level inverter is simplified into two-level inverter. So the selection of switching sequences is done as conventional two-level SVPWM method.Where in conventional direct torque control (CDTC), the stator flux and torque are directly controlled by the selection of optimal switching modes. The selection is made to restrict the flux and torque errors in corresponding hysteresis bands. In spite of its fast torque response, it has more flux, torque and current ripples in steady state. To overcome the ripples in steady state, a space vector based pulse width modulation (SVPWM) methodology is proposed in this paper. The proposed SVPWM method reduces the computational burden and reduces the total harmonic distortion compared with 2-level one and the conventional one also. To strengthen the voice simulation is carried out and the corresponding results are presented.
Space Vector Modulation with DC-Link Voltage Balancing Control for Three-Leve...IDES Editor
Modified space vector modulation (SVM) for
DC-link voltage balancing of three-level inverter is proposed
here. Effect of the DC-link capacitor voltage deviation on
inverter switching states is presented for three-level
inverter. Pulse pattern arrangements for proposed SVM
using degree of freedom available in choice of redundant
space vectors, sequencing of vectors, and splitting of duty
cycles of vector are best exploited. Seven-segment SVM
scheme and modified closed loop space vector DC-link
voltage balancing control schemes are implemented. The
effectiveness of proposed scheme is verified by simulations
and experimental verification on laboratory prototype.
A Refined Space Vector PWM Signal Generation for Multilevel InvertersIDES Editor
A refined space vector modulation scheme for
multilevel inverters, using only the instantaneous sampled
reference signals is presented in this paper. The proposed
space vector pulse width modulation technique does not require
the sector information and look-up tables to select the
appropriate switching vectors. The inverter leg switching times
are directly obtained from the instantaneous sampled
reference signal amplitudes and centers the switching times
for the middle space vectors in a sampling time interval, as in
the case of conventional space vector pulse width modulation.
The simulation results are presented to a five-level inverter
system for dual-fed induction motor drive. The dual-fed
structure is realized by opening the neutral-point of the
conventional squirrel cage induction motor. The five-level
inversion is obtained by feeding the dual-fed induction motor
with four-level inverter from one end and two-level inverter
from the other end.
The peer-reviewed International Journal of Engineering Inventions (IJEI) is started with a mission to encourage contribution to research in Science and Technology. Encourage and motivate researchers in challenging areas of Sciences and Technology.
Fast svm based 3 phase cascaded five level invertereSAT Journals
Abstract Introduction of nearest three vector algorithm is a major achievement in the area of space vector technology. Complexity and severe computations are still the drawbacks of SVM methods mainly for multilevel inverter applications. A fast SVM technique is introduced in this project which allows the calculation of switch time duration and the efficient determination of switching times based on the two level inverter scheme. SVM modulating waves are generated based on the two level system and then this modulating waves are compared with required number of carrier signals in order to generate the switching pulses for the inverter. Four triangular carrier signals are needed for a five level system in order to generate the switching pulses. Coordinates of the nearest three voltage vectors is not needed, so the complexity of the SVM technique can be reduced and it is the major advantage of the proposed technique compared with conventional SVM techniques used for multilevel inverters. A three phase five level cascaded H bridge topology is used here to verify the effectiveness of the proposed technique. MATLAB simulation and hardware implementation of the proposed system is done. From the analysis of both simulation and hardware it is clear that proposed SVM technique have more fundamental output and less THD than sinusoidal PWM technique. Key Words: Cascaded H bridge, Multilevel, Modulating wave, Space vector
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
Simplified svpwm algorithm for neutral point clamped 3 level inverter fed dtc...Asoka Technologies
In this paper, a simplified space vector pulse width modulation (SVPWM) method has been developed for three phase three-level voltage source inverter fed to direct torque controlled (DTC) induction motor drive. The space vector diagram of three-level inverter is simplified into two-level inverter. So the selection of switching sequences is done as conventional two-level SVPWM method.Where in conventional direct torque control (CDTC), the stator flux and torque are directly controlled by the selection of optimal switching modes. The selection is made to restrict the flux and torque errors in corresponding hysteresis bands. In spite of its fast torque response, it has more flux, torque and current ripples in steady state. To overcome the ripples in steady state, a space vector based pulse width modulation (SVPWM) methodology is proposed in this paper. The proposed SVPWM method reduces the computational burden and reduces the total harmonic distortion compared with 2-level one and the conventional one also. To strengthen the voice simulation is carried out and the corresponding results are presented.
Implementation of d space controlled dpwm basedeSAT Journals
Abstract The paper presents dSPACE controlled Induction motor drive fed through Discontinuous pulse width modulation (DPWM) algorithm based voltage source inverter. Two important performance measuring factors harmonic distortion in line current and dc bus utilization of the inverter can be improved with Discontinuous PWM approach in comparison with the popular conventional space vector (CSVPWM) approach; the paper contemplates on the implementation of DPWM algorithm for pulse generation which in turn are fed to intelligent power module that feeds the motor drive through DS1104 PPC603e / 250 MHz control desk. The results conclude the successful implementation of dSPACE Controlled induction motor drive. To validate the proposed work, numerical simulation including the experimental results is presented. Keywords:-DPWM, dSPACE, RTI
Ls catalog thiet bi tu dong dpr 1000-e_dienhathe.vnDien Ha The
Khoa Học - Kỹ Thuật & Giải Trí: http://phongvan.org
Tài Liệu Khoa Học Kỹ Thuật: http://tailieukythuat.info
Thiết bị Điện Công Nghiệp - Điện Hạ Thế: http://dienhathe.org
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
In real inverters' operations, it is essential to insert delay time in the pulses provided to the inverter switches to protect the DC link against the short circuits. From this situation, the dead time phenomenon is introduced that causes undesirable performance and distortion of the output signal. Previously, researchers have proposed various schemes for compensating or eliminating dead-time. In this paper, a new dead-time elimination (DTE) scheme is proposed with a guarantee algorithm to eliminate dead-time and overcome the issues produced at the zero-currents-crossing point (ZCC). This method does not require additional hardware or filters to determine the polarity of the output current, and its principle is very simple to implement. The developed DTE method completely removes the dead-time issues on the magnitude and phase of the output voltage, and avoid the problems which can be induced around the ZCC. The results confirm the effectiveness and safety of this method.
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.
Sinusoidal PWM has been a very popular technique used in AC motor control. This is a method that employs a triangular carrier wave modulated by a sine wave and the points of intersection determining the switching points of the power devices in the inverter.
An Overview of Different PWM Techniques to Reduce Total Harmonic Distortion o...paperpublications3
Abstract: There are three types of DC/AC inverters available on the market, which are classified by their output types: (1) in practice, DC/AC conversion is done with topologies of varying precision. It can be as simple as applying voltages of equal magnitude in opposite directions across a load to generate a square wave. It is a square wave inverter. (2) A more precise method of DC/AC conversion is the modified sine wave, which introduces a dead time in a normal square wave output so that higher peak voltage can be used to produce the same average voltage as a sinusoidal wall-outlet output. This method produces fewer harmonics than square wave generation, but it still is not quite the same as the AC power that comes from AC outlet. The harmonics that are still present in a modified sine wave makes this type of inverter unsuitable for use while electrical noise is a concern, such as in medical devices which monitor the vital signs of a human.(3)Pure sine wave DC/AC conversion will introduce the least amount of harmonics into an electrical device, but are also most expensive method. Since the AC sine wave must come from a DC source, switching must still take place. However, switching takes place with logic so that the energy delivered to a load approaches that of a pure sine wave. This means that extra components and design considerations are involved in the control circuitry of a pure sine wave inverter, driving up cost.
In this paper an overview is presented of different PWM techniques to control the output voltage as well as to reduce the total harmonic distortion of output voltage in an H-bridge inverter.
Space Vector PWM (SVPWM) is a more sophisticated technique for generating a fundamental sine wave that provides a higher voltage to the motor and lower total harmonic distortion (THD).
Enhancement of power quality by unified power quality conditioner with fuzzy ...eSAT Publishing House
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology.
Study of sinusoidal and space vector pulse width modulation techniques for a ...eSAT Journals
Abstract
This paper compares and evaluates the performance of Sinusoidal Pulse Width Modulation (SPWM) and Space Vector Pulse Width
Modulation (SVPWM) techniques for a three-level inverter by cascading two two-level inverters. In this topology, four power
semiconductor switches are used per phase and a total of twelve switches are required. The simulation study shows that SVPWM is
superior to SPWM in the aspects of better DC-bus utilization and offering better spectral performance.
Index Terms: space vector modulation, multi-level inverters, sine-triangle modulation, and cascaded inverter
This paper describes an electromagnetic field analysis of the induction machine and pulsating
torque .Analyzed machine is three phase induction machine with squirrel cage. Fourier transform is used for the
high harmonic components evaluation of the pulsating torque and the magnetic flux density along the air gap. The
comparison between computed and measured torque is presented in conclusion. The electromagnetic field analysis
is done by the ANSYS simulation. Fourier transform is used for the high harmonic components evaluation of the
pulsating torque. The comparison between computed and measured torque is presented in conclusion. Whole
experimental measurement was made with measurement card NI PCIe-6361 and shaft DATAFLEX22/20.
Keywords — AC machines, electromagnetic analysis, Fourier transform, high harmonic, magnetic fields, measurement torque.
Comparison of PWM Techniques and Selective Harmonic Elimination for 3-Level I...IJERA Editor
In this paper comparison of Selective Harmonic Elimination (SHE) method with different Pulse Width
Modulation (PWM) technique which are used as gate pulse for firing the IGBT‟s. Higher order harmonics are
easily eliminated by selecting a proper tuned value filters but lower order harmonics such as 3rd, 5th, 7th, and
9th are not easily eliminated. This paper includes Newton- Rapson method with random initial guess is used for
SHE reduction and shows where the solution can exit by solving transcendental non linear equations. With the
use of this method lower order harmonics as well as Total Harmonic Distortion (THD) will get reduce. In this
paper a cascaded H-bridge Multilevel Inverter using MATLAB/Simulink blocks is presented.
Design and Development of Gate Signal for 36 Volt 1000Hz Three Phase InverterIJMER
The sinusoidal PWM gating signals generation is most popular PWM method, which reduce
harmonic reduction in output. SPWM can be generated by FPGA, micro controller and micro processor but
this kind of device needs programming and coding hence avoided in using power system of aircraft. This
paper present an experiment using SPWM method to generate 1000 Hz gating signals suitable for 36 Volt ,
1000 Hz, 3 phase, three wire supply. Discrete components design approach is chosen to provide noise
immunity at higher amplitude level of signal and a large flexibility to adjust and process various operating
parameters of signals. The circuit is proved with commercial components however MIL version of
components can be easily incorporated in design in later stage
Implementation of d space controlled dpwm basedeSAT Journals
Abstract The paper presents dSPACE controlled Induction motor drive fed through Discontinuous pulse width modulation (DPWM) algorithm based voltage source inverter. Two important performance measuring factors harmonic distortion in line current and dc bus utilization of the inverter can be improved with Discontinuous PWM approach in comparison with the popular conventional space vector (CSVPWM) approach; the paper contemplates on the implementation of DPWM algorithm for pulse generation which in turn are fed to intelligent power module that feeds the motor drive through DS1104 PPC603e / 250 MHz control desk. The results conclude the successful implementation of dSPACE Controlled induction motor drive. To validate the proposed work, numerical simulation including the experimental results is presented. Keywords:-DPWM, dSPACE, RTI
Ls catalog thiet bi tu dong dpr 1000-e_dienhathe.vnDien Ha The
Khoa Học - Kỹ Thuật & Giải Trí: http://phongvan.org
Tài Liệu Khoa Học Kỹ Thuật: http://tailieukythuat.info
Thiết bị Điện Công Nghiệp - Điện Hạ Thế: http://dienhathe.org
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
In real inverters' operations, it is essential to insert delay time in the pulses provided to the inverter switches to protect the DC link against the short circuits. From this situation, the dead time phenomenon is introduced that causes undesirable performance and distortion of the output signal. Previously, researchers have proposed various schemes for compensating or eliminating dead-time. In this paper, a new dead-time elimination (DTE) scheme is proposed with a guarantee algorithm to eliminate dead-time and overcome the issues produced at the zero-currents-crossing point (ZCC). This method does not require additional hardware or filters to determine the polarity of the output current, and its principle is very simple to implement. The developed DTE method completely removes the dead-time issues on the magnitude and phase of the output voltage, and avoid the problems which can be induced around the ZCC. The results confirm the effectiveness and safety of this method.
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.
Sinusoidal PWM has been a very popular technique used in AC motor control. This is a method that employs a triangular carrier wave modulated by a sine wave and the points of intersection determining the switching points of the power devices in the inverter.
An Overview of Different PWM Techniques to Reduce Total Harmonic Distortion o...paperpublications3
Abstract: There are three types of DC/AC inverters available on the market, which are classified by their output types: (1) in practice, DC/AC conversion is done with topologies of varying precision. It can be as simple as applying voltages of equal magnitude in opposite directions across a load to generate a square wave. It is a square wave inverter. (2) A more precise method of DC/AC conversion is the modified sine wave, which introduces a dead time in a normal square wave output so that higher peak voltage can be used to produce the same average voltage as a sinusoidal wall-outlet output. This method produces fewer harmonics than square wave generation, but it still is not quite the same as the AC power that comes from AC outlet. The harmonics that are still present in a modified sine wave makes this type of inverter unsuitable for use while electrical noise is a concern, such as in medical devices which monitor the vital signs of a human.(3)Pure sine wave DC/AC conversion will introduce the least amount of harmonics into an electrical device, but are also most expensive method. Since the AC sine wave must come from a DC source, switching must still take place. However, switching takes place with logic so that the energy delivered to a load approaches that of a pure sine wave. This means that extra components and design considerations are involved in the control circuitry of a pure sine wave inverter, driving up cost.
In this paper an overview is presented of different PWM techniques to control the output voltage as well as to reduce the total harmonic distortion of output voltage in an H-bridge inverter.
Space Vector PWM (SVPWM) is a more sophisticated technique for generating a fundamental sine wave that provides a higher voltage to the motor and lower total harmonic distortion (THD).
Enhancement of power quality by unified power quality conditioner with fuzzy ...eSAT Publishing House
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology.
Study of sinusoidal and space vector pulse width modulation techniques for a ...eSAT Journals
Abstract
This paper compares and evaluates the performance of Sinusoidal Pulse Width Modulation (SPWM) and Space Vector Pulse Width
Modulation (SVPWM) techniques for a three-level inverter by cascading two two-level inverters. In this topology, four power
semiconductor switches are used per phase and a total of twelve switches are required. The simulation study shows that SVPWM is
superior to SPWM in the aspects of better DC-bus utilization and offering better spectral performance.
Index Terms: space vector modulation, multi-level inverters, sine-triangle modulation, and cascaded inverter
This paper describes an electromagnetic field analysis of the induction machine and pulsating
torque .Analyzed machine is three phase induction machine with squirrel cage. Fourier transform is used for the
high harmonic components evaluation of the pulsating torque and the magnetic flux density along the air gap. The
comparison between computed and measured torque is presented in conclusion. The electromagnetic field analysis
is done by the ANSYS simulation. Fourier transform is used for the high harmonic components evaluation of the
pulsating torque. The comparison between computed and measured torque is presented in conclusion. Whole
experimental measurement was made with measurement card NI PCIe-6361 and shaft DATAFLEX22/20.
Keywords — AC machines, electromagnetic analysis, Fourier transform, high harmonic, magnetic fields, measurement torque.
Similar to Close Loop V/F Control of Voltage Source Inverter using Sinusoidal PWM, Third Harmonic Injection PWM and Space Vector PWM Method for Induction Motor
Comparison of PWM Techniques and Selective Harmonic Elimination for 3-Level I...IJERA Editor
In this paper comparison of Selective Harmonic Elimination (SHE) method with different Pulse Width
Modulation (PWM) technique which are used as gate pulse for firing the IGBT‟s. Higher order harmonics are
easily eliminated by selecting a proper tuned value filters but lower order harmonics such as 3rd, 5th, 7th, and
9th are not easily eliminated. This paper includes Newton- Rapson method with random initial guess is used for
SHE reduction and shows where the solution can exit by solving transcendental non linear equations. With the
use of this method lower order harmonics as well as Total Harmonic Distortion (THD) will get reduce. In this
paper a cascaded H-bridge Multilevel Inverter using MATLAB/Simulink blocks is presented.
Design and Development of Gate Signal for 36 Volt 1000Hz Three Phase InverterIJMER
The sinusoidal PWM gating signals generation is most popular PWM method, which reduce
harmonic reduction in output. SPWM can be generated by FPGA, micro controller and micro processor but
this kind of device needs programming and coding hence avoided in using power system of aircraft. This
paper present an experiment using SPWM method to generate 1000 Hz gating signals suitable for 36 Volt ,
1000 Hz, 3 phase, three wire supply. Discrete components design approach is chosen to provide noise
immunity at higher amplitude level of signal and a large flexibility to adjust and process various operating
parameters of signals. The circuit is proved with commercial components however MIL version of
components can be easily incorporated in design in later stage
This paper presents new modified space vector pulse width modulation techniques (Phase disposition-Space vector pulse width modulation, Alternative Phase Opposition disposition- Space vector pulse width modulation and Phase Opposition disposition-Space vector pulse width modulation) are analyzed for three-phase cascaded multi-level inverter fed induction motor from the point of view of the Phase voltages, line voltage, stator current,speed,torque and Total harmonic distortion.in the proposed modified technique the reference signals are generated by adding offset voltage to the reference phase voltages.This modified SVPWM technique does not involve region indentification,sector identification for switching vector determination as are required in the conventional multi level SVPWM technique,it is also reduces the computation time compared to the conventional space vector PWM technique.The necessary calculations for generation of new modified SVPWM for the modulation strategies have presented in detail. It is observed that the modified SVPWM modulation ensures excellent, close to optimized pulse distribution results and THD is compared to for five-level, seven-level, nine-level and eleven-level Cascaded H-Bride Multi-level Inverter fed to Induction motor. Theoretical investigations were confirmed by the digital simulations using MATLAB/SIMULINK software.
Torque Production & Control of Speed in Synchronous Motor.
Speed of synchronous motors can be controlled using two methods called open loop and close loop control.
Open loop contol is the simplest scalar control method where motor speed is controlled by independent frequency control of the converter.
In case of close loop self control mode, instead of controlling the inverter frequency independentaly, the frequency and the phase of the output waveform are controlled by an absolute position encoder mounted on the machine shaft giving an account of position of the rotor.
Simulation Investigation of SPWM, THIPWM and SVPWM Techniques for Three Phase...IJPEDS-IAES
Pulse width modulation (PWM) technique is one of the vital issues for power electronic circuit control. A number of Pulse width modulation (PWM) techniques are increasingly applied in many new industrial applications that require superior performance. The most widely applied PWM technique for three-phase voltage source inverters are Sine Pulse Width Modulation (SPWM), Third Harmonic Injection Pulse Width Modulation (THIPWM) and Space Vector Pulse Width Modulation (SVPWM). SPWM is the most simple modulation technique that can realize easily in analog circuit. However, it has some drawbacks such as higher total harmonic distortion (THD), lower switching frequency and not capable in over modulation region. THIPWM and SVPWM both provide better THD compared to SPWM. SVPWM shows lower THD in over modulation region and in high frequency application compared to THIPWM. These three techniques are discussed, analyzed and compared in terms of modulation index, switching frequency and inverter input voltage in this paper. The modeling and simulation for all PWM techniques have been done by using MATLAB/SIMULINK and Origin 6.1. From the simulation results, SVPWM shows the best performance and meet IEEE 519 standard of current harmonics level.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
Total Harmonic Distortion of Dodecagonal Space Vector ModulationIJPEDS-IAES
Space vector modulation technique is one of the best PWM techniques which have been implemented to the Multilevel inverter circuit to get the purely sinusoidal cuurent. This is a important algorithm which is implemented in open wind induction motor. This type of I.M has great impact on Electric Drive system. SVM is nothing but the technique of switching algorithm. The Hexagonal space vector modulation has been implemented before, but elimination of higher order harmonics is not possible. Torque pulsation arises. Speed control of Induction motor was not smooth. So Dodecagonal (12) structure developed. A 12 side polygonal space vector structure is meant for eliminating (6n±1) harmonics in the phase current waveform throughout the modulating range. A high resolution of PWM technique is proposed involving multiple 12 sided polygonal (Dodecagonal) structure that can generate highly sinusoidal voltage at a reduced switching frequency. In this paper different values of frequencies have been taken for harmonic analysis. SVM method features a higher level of dc-bus voltage utilization compared to the conventional PWM.
Two leg three-phase inverters (FSTPIs) have been proposed to be used in low-power; low-cost applications because of the reduced number of semiconductor devices, and space vector pulse width modulation (SVPWM) techniques have also been introduced to control FSTPIs. However, high-performance controllers are needed to implement complicated SVPWM algorithms, which limit their low-cost applications. To simplify algorithms and reduce the cost of implementation, an equivalent scalar method for SVPWM of FSTPIs is proposed. SVPWM for FSTPIs is actually a sine PWM by modulating two sine waves of 600 phase difference with a triangle wave, but in this method third harmonics doesn’t eliminated. So as to eliminate the third harmonics we have to compose a high frequency sine wave to on existing sine waves. So such a special sine PWM can be used to control FSTPIs. The Mathematical and simulation results demonstrate the validity of the proposed method.
http://www.mathworks.com/matlabcentral/fileexchange/authors/126814
Design and Implementation of Schmitt Trigger using Operational AmplifierIJERA Editor
A Schmitt trigger is an electronic circuit, a Comparator that is used to detect whether a voltage has crossed over a given reference level. It has two stable states and is very useful as signal conditioning device. When an input waveform in the form of sinusoidal waveform, triangular waveform, or any other periodic waveform is given, the Schmitt trigger will produce a Rectangular or square output waveform that has sharp leading and trailing edges. Such fast rise and fall times are desirable for all digital circuits. The state of the art presented in the paper is the design and implementation of Schmitt trigger using operational amplifier µA-741, generating a Rectangular waveform. Furthermore, the Schmitt trigger exhibiting hysteresis is also presented in the paper. Due to the phenomenon of hysteresis, the output transition from HIGH to LOW and LOW to HIGH will take place at various thresholds.
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.
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Similar to Close Loop V/F Control of Voltage Source Inverter using Sinusoidal PWM, Third Harmonic Injection PWM and Space Vector PWM Method for Induction Motor (20)
42 30 nA Comparative Study of Power Semiconductor Devices for Industrial PWM ...IAES-IJPEDS
The growing demand of energy translates into efficiency requirements of
energy conversion systems and electric drives. Both these systems are based
on Pulse Width Modulation (PWM) Inverter. In this paper we firstly present
the state of art of the main types of semiconductors devices for Industrial
PWM Inverter. In particular we examine the last generations of Silicon
Carbide (SiC) MOSFETs and Insulated Gate Bipolar Transistors (IGBTs)
and we present a comparison between these devices, obtained by SPICE
simulations, both for static characteristics at different temperatures and for
dynamic ones at different gate resistance, in order to identify the one which
makes the PWM inverter more efficient.
Modeling and State Feedback Controller Design of Tubular Linear Permanent Mag...IAES-IJPEDS
In this paper a state feedback controller for tubular linear permanent magnet
synchronous motor (TLPMSM) containing two gas springs, is presented.
The proposed TLPMSM controller is used to control reciprocating motions
of TLPMSM. The analytical plant model of TLPMSM is a multi-input
multi-output (MIMO) system which is decoupled to some sub single-input
single-output (SISO) systems, then, the sub SISO systems are converted to
sub-state space models. Indeed, the TLPMSM state space model is decoupled
to some sub-state spaces, and then, the gains of state feedback are calculated
by linear quadratic regulation (LQR) method for each sub-state space
separately. The controller decreases the distortions of the waveforms.
The simulation results indicate the validity of the controller.
Analysis of Harmonics and Ripple Current in Multi-Module Converters with Incr...IAES-IJPEDS
Controlled rectifiers are considered as the most important hardware part in
the field of HVDC systems in transmission lines and can be used for a
number of power electronics based system operation, control and utility
applications. In this paper, a brief design of a 12-pulse, 24-pulse, 36-pulse
and a 48-pulse converter connected to the grid is presented along with the
harmonic and ripple current analysis with its comparison statistics and thus
providing a justification for the suitable ones. The performance of the
12, 24, 36 and 48-pulse converters are compared for their effectiveness in
both quantitatively as well as qualitatively. Further, comparison of the
48-pulse converter on its THD and current ripple which is connected towards
the grid with simple pulse width modulation technique is also proposed. It
combines all features of the low switching concepts and DC current reinjection
techniques. Some basic topological explanation of the controlled
rectifiers and simulation results using MATLAB are also presented in this
paper in order to justify the harmonic analysis. The simulation results along
with the quantitative results shows the effectiveness of the proposed scheme
for the cancelation or the elimination of the harmonics result in maximum
harmonic mitigation, for high power utility applications, the 48-pulse
converter is most fitting to improve the conversion efficiency, low di/dt
and dv/dt and active and reactive power controllability.
Comparative Study of Various Adjustable Speed Drives during Voltage SagIAES-IJPEDS
This Paper compares the sensitivity of various adjustable speed drives to
voltage sag for the process control applications. Three phase voltage sag of
type B caused due to SLG fault is considered and four topologies of ASD’s
are compared in this paper. The comparison is done especially in speed,
voltage, current and torque of the ASDs. Diode rectifier without z source
inverter, diode rectifier with z source inverter, single phase two leg Vienna
rectifier and single phase neutral linked Vienna with z source inverter are
compared and the best one is highlighted. The circuits of various ASD’s are
simulated using Matlab /Simulink.
Modified Distribution Transformer for Enhancing Power Quality in Distribution...IAES-IJPEDS
The percentage of non-linear loads in the power distribution sector is increasing
day by day. Harmonics injected by these non-linear loads circulate in the delta
windings of the conventional distribution transformer thereby increasing the
temperature and losses. This reduces the efficiency and life of the transformers.
In a modified distribution transformer configuration proposed recently, called
star-star-delta_utilized configuration (YYD_utilized), the harmonics circulating
in the delta winding was utilized and the drainage power thus recovered was
used to power auxiliary loads. This paper presents the experimental studies
conducted on YYD_utilized distribution transformer. When compared to
conventional star-star, delta-star and star-star-delta transformers, the new
configuration of YYD_utilized transformer has shown considerable
improvement in transformer efficiency. The results obtained show that when
the power from the circulating harmonics is recovered and utilized, it not only
improves transformer efficiency but also improves the power factor
and reduces the harmonic distortions at the primary side of the transformer.
The results obtained also suggest the existence of maximum power point or an
optimum loading for the recovered harmonic power.
Modelling of Virtual Synchronous Converter for Grid-Inverter Synchronization ...IAES-IJPEDS
In this paper, virtual synchronous converter (VSCon) is been developed
which mimic the behavior of synchronous generator as in order to have fast
synchronization between the inverter with the grid. This synchronization is
important before can sent the power among inverter-grid connection. This
technique can also been applied at the distributed generated sources when are
connected to the local microgrids. Here, the frequency and voltage
synchronization also can be controlled at the same time some improvement
on synchronous generator mathematical model that is suitable to be
implemented into the inverter control. The whole unit of VSCon is operated
and simulated in Matlab/Simulink in order to observe all consequences
during synchronizing the voltage, frequency and phase-angle. It has been
verified by the simulation circuit where, the power converter can be
synchronized with the microrids without using a PLL unit for self
synchronization. This VSCon technique has proven that, by applying the
concept of the synchronous generator model in inverter control, it can cause
the inverter to behave as generator system, which does not required any
phase information from the grid in order to be synchronized.
Enhanced Crowbar Protection for Fault Ride through Capability of Wind Generat...IAES-IJPEDS
Due to increasing demand in power, the integration of renewable sources like
wind generation into power system is gaining much importance nowadays.
The heavy penetration of wind power into the power system leads to many
integration issues mainly due to the intermittent nature of the wind and the
desirability for variable speed operation of the generators. As the wind power
generation depends on the wind speed, its integration into the grid has
noticeable influence on the system stability and becomes an important issue
especially when a fault occurs on the grid. The protective disconnection of a
large amount of wind power during a fault will be an unacceptable
consequence and threatens the power system stability. With the increasing
use of wind turbines employing Doubly Fed Induction Generator (DFIG)
technology, it becomes a necessity to investigate their behavior during grid
faults and support them with fault ride through capability. This paper
presents the modeling and simulation of a doubly fed induction generator
according to grid code compatibility driven by a wind turbine connected to
the grid. This paper analyses the voltage sag due to a three-phase fault in the
wind connected grid. A control strategy including a crowbar circuit has been
developed in MATLAB/SIMULINK to bypass the rotor over currents during
grid fault to enhance the fault ride through capability and to maintain system
stability. Simulation results show the effectiveness of the proposed control
strategies in DFIG based grid connected wind turbine system.
An Improved of Multiple Harmonic Sources Identification in Distribution Syste...IAES-IJPEDS
This paper introduces an improved of multiple harmonic sources
identification that been produced by inverter loads in power system using
time-frequency distribution (TFD) analysis which is spectrogram.
The spectrogram is a very applicable method to represent signals in
time-frequency representation (TFR) and the main advantages
of spectrogram are the accuracy, speed of the algorithm and use low memory
size such that it can be computed rapidly. The identification of multiple
harmonic sources is based on the significant relationship of spectral
impedances which are the fundamental impedance (Z1) and harmonic
impedance (Zh) that extracted from TFR. To verify the accuracy of the
proposed method, MATLAB simulations carried out several unique cases
with different harmonic producing loads on IEEE 4-bus test feeder cases. It is
proven that the proposed method is superior with 100% correct identification
of multiple harmonic sources. It is envisioned that the method is very
accurate, fast and cost efficient to localize harmonic sources in distribution
system.
Performance and Energy Saving Analysis of Grid Connected Photovoltaic in West...IAES-IJPEDS
The paper presents performance and energy saving analysis of 1.25 kWp grid
connected photovoltaic system under difference weather condition in West
Sumatera. The measured data were performed during weather data that often
occur in West Sumatra i.e. sunny, overcast, raining and cloudy.
The synchronizing process successfully done even bad weather conditions
when sunlight was low automatically. Photovoltaic in average start
producing power from 7:00 AM to 6:00 PM for normal or clear sky, however
under overcast, raining and cloudy weather, the PV power decreased and
disconnected earlier before sunset. During intermittent raining, overcast and
cloud covered the PV power output show an irregular profile. The PV energy
saving performed for three residential connection cases: 1300 VA, 900 VA
with subsidized and 900 VA without subsidized. The solar PV installation
have more benefits and energy saving for 1300 VA, 900 VA without
subsidized with payback period around 8.5 years. However, the 900 VA with
subsidized take longer 20.8 years, but still in PV lifespan 25 years. In the
future, household subsidies may be reduced or eliminated, the solar energy
will be viable alternative of energy resources when it can produce electricity
at a cost equivalent to utility grid PLN rate.
An Improved Constant Voltage Based MPPT Technique for PMDC MotorIAES-IJPEDS
Stand-alone photovoltaic (SAPV) systems are being used in remote areas
and are being seen as one of the promising solution in this regard. The SAPV
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converter, a controller and a PMDC motor. The current-voltage and powervoltage
characteristics being nonlinear, the SAPV system require maximum
power point techniques (MPPT) control techniques to extract maximum
power available from the PV cell. A voltage based MPPT technique which is
capable of tracking MPP has been selected because of numerous advantages
it offers such as: simple and low cost of implementation. The limitation of
constant voltage method is that its efficiency is low as the PV panel has to be
disconnected from the load for measurement of the open circuit voltage
(Voc). In the presented paper, the authors have removed this limitation by
using a pilot PV panel for measurement of Voc. A proportional-integrator (PI)
based controller is used in implementation of constant voltage MPP
technique and the modeling is done in MATLAB®/SIMULINK simulation
environment. The simulation results are presented and discussed in the paper,
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A Discrete PLL Based Load Frequency Control of FLC-Based PV-Wind Hybrid Power...IAES-IJPEDS
The sun and wind-based generation are considered to besource of green
power generation which can mitigate the power demand issues. As solar and
wind power advancements are entrenched and the infiltration of these
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learning of natural conditions for a specific area is fundamental. Fuzzy Logic
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boost converter are utilized for viable operation and to keep DC voltage
steady at desired level. The control scheme of the inverter is intended to keep
the load voltage and frequency of the AC supply at aconstant level regardless
of progress in natural conditions and burden. A Simulink model of the
proposed Hybrid system with the MPPT controlled Boost converters
and Voltage regulated Inverter for stand-alone application is developed in
MATLAB R2015a, Version 8.5.0. The ongoing information of Wind Speed
and Solar Irradiation levels are recorded at BITS-Pilani, Hyderabad Campus
the performance of the voltage regulated inverter under constant and varying
linearAC load is analyzed. The investigation shows that the magnitude of
load voltage and frequency of the load voltage is maintained at desired level
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An Adaptive Virtual Impedance Based Droop Control Scheme for Parallel Inverte...IAES-IJPEDS
This paper presents an adaptive virtual impedance based droop control
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essential to achieve power sharing between inverters in microgrid, various
droop control schemes have been proposed. In practice, the line impedance
between inverters and the point of common coupling (PCC) in microgrid are
not always equal. This imbalance in line impedance often results in a reactive
power mismatch among inverters. This problem has been solved by
introducing a virtual impedance loop in the conventional droop control
scheme. However, the reactive power sharing performance of this method is
still deteriorated when the line impedances change during operation. To
overcome such a problem, a new control scheme that is based on a virtual
impedance loop and an impedance estimation scheme is proposed.
To monitor the changes in line impedances, the impedance estimator is
implemented by using the output voltages and currents of inverters as well as
the voltages at the PCC. To compensate for the reactive power mismatch due
to the line impedance changes, the estimated line impedance is fed to the
virtual impedance loop in which it adjusts the virtual impedance value.
Comparative simulation results with the conventional ones verify the
effectiveness of the proposed adaptive virtual impedance based droop control
scheme.
Open-Switch Fault-Tolerant Control of Power Converters in a Grid-Connected Ph...IAES-IJPEDS
This paper presents the study of an open switch fault tolerant control of a
grid-connected photovoltaic system. The studied system is based on the
classical DC-DC boost converter and a bidirectional 6-pulse DC-AC
converter. The objective is to provide an open-switch fault detection method
and fault-tolerant control for both of boost converter and grid-side converter
(GSC) in a grid-connected photovoltaic system. A fast fault detection method
and a reliable fault-tolerant topology are required to ensure continuity of
service, and achieve a faster corrective maintenance. In this work, the mean
value of the error voltages is used as fault indicator for the GSC, while, for
the boost converter the inductor current form is used as fault indicator. The
fault-tolerant topology was achieved by adding one redundant switch to the
boost converter, and by adding one redundant leg to the GSC. The results of
the fault tolerant control are presented and discussed to validate the proposed
approach under different scenarios and different solar irradiances.
Photovoltaic System with SEPIC Converter Controlled by the Fuzzy LogicIAES-IJPEDS
In this work, a fuzzy logic controller is used to control the output voltage of a
photovoltaic system with a DC-DC converter; type Single Ended Primary
Inductor Converter (SEPIC). The system is designed for 210 W solar
photovoltaic (SCHOTT 210) panel and to feed an average demand of 78 W.
This system includes solar panels, SEPIC converter and fuzzy logic
controller. The SEPIC converter provides a constant DC bus voltage and its
duty cycle controlled by the fuzzy logic controller which is needed to
improve PV panel’s utilization efficiency. A fuzzy logic controller (FLC) is
also used to generate the PWM signal for the SEPIC converter.
An Approach to Voltage Quality Enhancement by Introduction of CWVM for Distri...IAES-IJPEDS
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system networks. Several international standard issued to control the voltage
flicker are briefly described and some important methods to analyse
electrical circuits with sinusoidal and non-sinusoidal waveforms are
introduced and evaluated. One of these methods-Cockcroft Walton Voltage
Multiplier (CWVM) has been used to increase the voltage of a filter, which is
also described in this paper as a practical application. The filter can
compensate for harmonic currents, power factor, and unbalance voltage.The
simulation results using Multisimare presented, showing that good dynamic
and steady-state response can be achieved with this approach.
Electric Power Converter with a Wide Input Voltage RangeIAES-IJPEDS
The electric power converter for downhole telemetry systems of oil-well
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electronic circuits required for the operation of the motor pump sensors
and transmission of data about their condition to the surface are described.
A few methods of electric power conversion for this purpose are considered.
The circuit contained two steps of voltage converting are proposed.
The electrical scheme of this method is considered in the article. Proposed
decisions are simulated and verified experimentally. The input high supply
voltage range (200-4200 V) without loss of efficiency (even temporary) was
obtained. The results of simulation and experimental studies have shown
very close results.
Design and Implementation of Real Time Charging Optimization for Hybrid Elect...IAES-IJPEDS
Electric vehicle (EV) has gained incredible interest from the past two decade
as one of the hopeful greenhouse gasses solution. The number of Electric
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friendly becomes more important. The main challenge in usage of EV is the
charging time required for the batteries used in EV. As a consequence, this
subject matter has been researched in many credentials where a wide range
of solutions have been proposed. However those solutions are in nature due
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an Android application based charging optimization is proposed.
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charging slots using token system and route planner. At emergency
situations, an alternative service is provided by mobile charging stations.
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destination can be done. In addition to that nearest places such as parks,
motels are indicated. The estimated time and distance between the electric
vehicle and the charging station is calculated by the charging station server
according to which the parking lot is allocated. Vehicle to charging station
communication is established for the time estimation of charging. This will
help the EV users to know about charge status and charging station, which
support fast charging method and availability of the station on the go
and also when to charge their EV. The Arduino UNO board has been used
for the hardware part. The hardware results are confirming the conceptual of
the proposed work.
Performance Analysis of Photovoltaic Induction Motor Drive for Agriculture Pu...IAES-IJPEDS
This paper presents water pumping system using renewable source (solar)
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doubler rectifier and a snubber circuit. TIBC is designed to drive the three
phase induction motor from PV energy. TIBC converter is also known as
current fed multi resonant converter having high voltage gain and low input
current ripple. Converter switches are controlled through hysteresis controller
and ZCS resonant topologies. Solar PV power fluctuates according to
irradiation level of sunlight and hence tracking of maximum power at all
time is mandatory. SPWM control with third harmonic injection is used to
trigger the IGBT’s in the inverter. The development is oriented to achieve a
more efficient, reliable, maintenance free and cheaper solution than the
standard ones, that uses DC motors or low voltage synchronous motors.
The proposed method is verified with MATLAB/SIMULINK and the system
simulation confirms the performance of the proposed system.
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This paper deals with performance of photovoltaic powered Embedded
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PV-Panel is boosted and converted into AC using Embedded Z-Source
Inverter. EZSI system based on the concept of Z-Source Inverter (ZSI),
which provides single stage power conversion. The EZSI also produce same
voltage gain as that of the ZSI based system. In EZSI the DC source is
embedded within the X-shaped LC impedance network, due to this EZSI has
the added advantage of inherent source filtering capability, this can be
achieved without any extra passive filter. EZSI can produce the AC output
voltage which is greater than the DC link voltage. EZSI system also provides
ride-through capability under voltage sags. In this paper the performance of
space vector modulated EZSI fed Induction Motor Drive is compared with
sinusoidal PWM controlled EZSI fed Drive system. The PV powered EZSI
fed three phase Induction Motor System is designed, modeled and simulated
using MAT LAB-SIMULINK and the corresponding results are presented.
This drive system has advantages like voltage boosting ability and reduced
harmonic content.
Single-Phase Multilevel Inverter with Simpler Basic Unit Cells for Photovolta...IAES-IJPEDS
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basic unit cells. The proposed MLI is able to operate in two modes, i.e.
charge mode to charge the batteries, and inverter mode to supply AC power
to load, and therefore, it is inherently suitable for photovoltaic (PV) power
generation applications. The proposed MLI requires lower number of power
MOSFETs and gate driver units, which will translate into higher cost saving
and better system reliability. The power MOSFETs in the basic unit cells
and H-bridge module are switched at near fundamental frequency, i.e. 100
Hz and 50 Hz, respectively, resulting in lower switching losses. For low total
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(9-level) has been simulated and evaluated experimentally. The simulation
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2. ISSN: 2088-8694
IJPEDS Vol. 7, No. 1, March 2016 : 217 – 224
218
2. TWO LEVEL INVERTER
In this level 180 degree mode each MOSFET conducts for 180° of a periodic cycle. Each phase has
a pair S1, S4; S3, S6; S5, S2 and each trigger for 180° of time interval. And S1, S3, and S5 conduct at an
interval of 120°. Refer to Figure 1.
0° 60° 120° 180° 240° 300° 360°
S1 S3 S5
S6 S2 S4 S6
Figure 1. Switching period of MOSFET
Specification of each MOSFET 180° mode VSI. Refer to Table 1.
Table 1. For 50 Hz frequency Pulse Generator where amplitude = 230*1.414 and pulse width 50%
S1 Phase Delay = 0 msec
S4 Phase Delay = 10 msec
S3 Phase Delay = 6.667 msec
S6 Phase Delay = 16.667 msec
S5 Phase Delay = 13.33 msec
S2 Phase Delay = 23.33 msec / - 0.0033 sec
3. SINUSOIDAL PULSE WIDTH MODULATION (SPWM)
This technique is very useful for reducing the Total Harmonic Distortion (THD). This technique is
characterized by the constant amplitude pulse. And the width of these pulses is modulated to get Inverter
output Voltage control and to reduce its harmonic content in the voltage. Force commutation is essential for
the pulse width modulation technique. The Switching sequences and topology of the Inverter is same as
normal level of Inverter. In this technique the Gate pulses of each MOSFET is modulated and control the
Switching of MOSFET to get the desired output voltage at desired frequency for input voltage of Induction
motor.
Fourier analysis of the voltage waveform and get the output voltage of an Inverter.
V(t)= A0 + 2* ∑ ∗ ∗ ] (i)
The output voltage wave is odd symmetry. So, A0 and Ak is zero because it has an even symmetry. So,
Bk= (2/π)*[ ∗ sin ]
=((4*Vs)/(nπ))*[sin(nπ/2)*sin(nd)] (1)
V0= ∑ ∗ sin ∗ sin ∗ sin , , … ) (2)
nd is made equal to π. So, d= (π/n)
So, the pulse width is made 2d so it is equal to (2d/n).
In the Simulink model sine wave frequency is 50 Hz and the amplitude of the sine wave is 230*1.414 and
carrier frequency is sinusoidal with frequency is 10000 Hz.
For a close loop we take the speed as a feedback and compare to the reference speed and then the speed error
again added with the rotor speed and its output is change into the Gate Pulse of the MOSFET.
4. THIRD HARMONIC INJECTION PULSE WIDTH MODULATION METHOD (THIM)
This method is also a very useful method for eliminating the harmonic in the system which comes
due to the presence of power electronic switches. In this method we inject the third harmonic in the system
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and control the pulse of the each MOSFET to get the harmonic free inverter output voltage. Now to find the
amplitude of the third harmonic of unknown amplitude of the third harmonic component.
So let us take simple sine wave with the third harmonic sine wave of unknown amplitude x.
Y (α) = sin (α) + x*sin (3α) (3)
For finding the maximum value of the function
d/dα (Y (α)) =0
Which gives,
α=cos-1
9 1 / 12 (4)
From equation (3) and (4)
F(x)=Y(α)=[(3x+1)( 3 1 / 12 – 4x 3 1 / 12.
] (5)
For finding the maximum value of equation (5) using formula d/dx (F(x))
So we get x = -0.334, 0.1667
At x = -0.334
d2
/dx2
(F(x)) = 0
At x = 0.1667
d2
/dx2
(F(x)) = 10.3923
Which shows the given function is minimum. At
x = 0.1667 and the value of α is 60°
Now putting the value of α at x = 0.1667
d2
/dx2
(Y (α)) = -2
This shows the function Y (α) is maximum at x = 0.1667 and the value of α is 60°
So this is clear that the third harmonic should be 0.1667 of this amplitude
Now putting the value of x= 0.1667 and α= 60° in equation (4)
Which gives Y (α) =0.866025 which is the peak of resultant waveform with third harmonic. And the
modulation factor of 1/0.866025 is 1.15470053 giving 15.47% more DC utilization.
120°
120°
(6)
Where,
V is Instantaneous maximum Magnitude of fundamental
And
α is instantaneous phase of fundamental
The above results give the information about the amplitude of the output phase voltage is 1.15 times of the
normal output phase voltage. In the Simulink model sine wave frequency is 50 Hz and the amplitude of the
sine wave is 230*1.414 and carrier frequency is sinusoidal with frequency is 10000 Hz. And additional sine
wave is added to add the third harmonic in the Inverter whose sine wave amplitude is 230*1.414/6 and its
frequency is 3 times of rated frequency. For a close loop we take the speed as a feedback and compare to the
reference speed and then the speed error again added with the rotor speed and its output is change into the
Gate Pulse of the MOSFET.
5. SPACE VECTOR PULSE WIDTH MODULATION (SVPWM)
This technique is very useful for reducing the Total Harmonic Distortion. This technique is
characterized by the constant amplitude pulse. And the width of these pulse is modulated to get Inverter
output Voltage control and to reduce its harmonic content. The topology of three leg Voltage Source Inverter
because of the constraint that the input line must never be shored and the output current must be always be
continuous a Voltage Source Inverter can assume only eight distinct sectors. Six out of these eight sectors
produces a non-zero output voltage and are known as non-zero switiching states and the remaining two
sectors produces zero voltage are known as zero switching states.
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The SVPWM can be implemented by using wither sector selection algorithm or by using a carrier based
space vector algorithm.
The types of SVPWM implementations are:
a) Sector selection
b) Reduced switching
c) Carrier based
d) Reduced switching carrier based
Sector selection of SVPWM : -
Step1. Determine Vd, Vq, Vref, and angle µ
Step2. Determine time duration T1, T2, T0
Step3. Determine the switching time of each
IGBT (S1 to S6)
For Step 1, Refer Figure 2
Figure 2. Vd, Vq, Vref, and µ can determine
Vd=Van–0.5*Vbn-0.5*Vcn (7)
Vq=0+0.866*Vbn–0.866*Vcn (8)
Vref= Vd
2
+ Vq
2
) (9)
µ = tan-1
(Vq/Vd) = wt=2πft (10)
For Step 2, Refer Figure 3 which shows the switching time during a sector1
Figure 3. Reference vector as a combination of adjacent vectors at sector
Switching time duration at sector 1
= 1 + 2 + 0 (11)
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7. SIMULINK MODEL AND WAVEFORM
Figure 4 shows the complete Simulink model of Close loop control of Induction Motor with
different different Inverter technique. Figure 5, 7, and 9 shows the Torque and Speed Characterstics with
respect to time and Figure 6, 8, and 10 shows the Stator current of the Induction Motor THD when SPWM,
THIPWM, and SVPWM technique is employed respectively.
Figure 4. Close loop Inverter with IM Load
Figure 5. Two level SPWM INVERTER Torque and
Speed
Figure 8. SPWM Stator current THD
Figure 6. Two level THIPWM INVERTER Torque
and Speed Figure 9. THIPWM Stator current THD
7. IJPEDS ISSN: 2088-8694
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223
Figure 7. Two level SVPWM INVERTER Torque
and Speed Figure 10. SVPWM Stator Current THD
8. RESULTS
Table 4 shows the Stator Current of Induction Motor THD with respect there techniques which are
employed. And the result shows the SVPWM technique has better waveform as compre to SPWM and
THIPWM.
Table 4. THD results
LEVEL TECHNIQUE LOAD THD%
TWO
SPWM IM 3.91
THIPWM IM 3.61
SVPWM IM 3.21
9. CONCLUSION
With the help of simulation result we can conclude that SVPWM (Space Vector Pulse Width
Modulation) technique is better than the THIPWM (Third Harmonic Injection Pulse Width Modulation)
technique and SPWM (Sinusoidal Pulse Width Modulation) technique. The THD of Stator current of
SVPWM Inverter is less so its industrial application is better than the THIPM Inverter and SPWM Inverter.
But the rise time of SVPWM Inverter is more as compare to THIPWM and SPWM Inverter that is 1.5 sec,
0.385sec and 0.4 sec simulation time respectively. The system is free from the PID controller. So the
controlling cost of the Induction Motor is cheap. We know that PID controller is 85% efficient. But this
Simulink model is 90-95% efficient.
REFERENCES
[1] Chimezie O. Adiuku, Abdul Rahiman Beig and Saikrishna Kanukollu, “Sensorless Closed Loop V/F control of
medium-Voltage High-Power Induction Motor with Synchronized Space Vector PWM”, IEEE 2015 PP 978-4799.
[2] Vijay Babu Koreboina, Shankar J Magajikondi and A.B. RAJU, “Modeling, Simulation and PC based
Implementation of a Cloed Loop Speed Control of VSI Fed Induction Motor Drive”, IEEE 2011 PP978-4244.
[3] Zulkifilie Bin Ibrahim, Md. Liton, Ismadi Bin Bugis, Nik Munaji Nik Mahadi and Ahmad Shukri, “Simulation
Investigation of SPWM, THIPWM and SVPWM Techniques for Three Phase Voltage Source Inverter”, IJPEDS,
Vol.4 No.2 pp.223-232.
[4] G.K. Dubey and C.R. Kasrabada, “Power Electronics and Drives”, IETE Book Series, Vol. 1, TM HILL P.C. Ltd.,
New Delhi, 1993.
[5] B.K. Bose, “Energy, environment and Advances in Power Electronics”, IEEE Trans. on P.E. Vol.15, No.4 JULY
2000.
[6] P.C. Sen, “thyristorised DC Drive”, New York: Wiley Interscience, 1981.
[7] P. Ramana, B. Santhosh Kumar, K. Alice Maryand M. Suraya Kalavathi, “Comparison of various PWM
Techniques for Field Oriented Control VSI fed PMSM Drive”, IJAREEIE, Vol. 2, Issue. 7, pp. 2928-2936.
[8] R. Kameswara Rao, P. Srinivas, M.V. Suresh Kumar, “Design and analysis of variousInverters using different
PWM Techniques”, IJES, ISSN€: 2319-1813 ISSN, (p): 2319-1805.
8. ISSN: 2088-8694
IJPEDS Vol. 7, No. 1, March 2016 : 217 – 224
224
[9] Raja Ram Kumar, Sunil Kumar, Alok Yadav, “Comparison of PWM Techniques and Inverter Performance”, IOSR
Journal of Electrical and Electronics Engineering (IOSR-JEEE), ISSN: 2278-1676, Vol 4, Issue 1 (Jan. – Feb.
2013), PP 18-22.
[10] DUBEY, G.K., Power Semiconductor Controlled Drives. Englewood Cliffs, NJ: Prentice Hall, 1989.
[11] DATTA, S.M. “Power Electronics & Control”. Reston, VA: Reston Publishing Co., Inc., 1985.
[12] Microsemi User Guide, “Field Oriented Control of Permanent Magnet Synchronous Motors (PMSM)”,
www.microsemi.com
[13] N. Mohan, T.M. Undeland, etal. “Power Converters, Applications and Design”, 3rd
edition, Johan Wiley and Sons,
New York, 2003.
[14] Bimal K. Bose, “Modern Power Electronics and AC Drives”, Prentice Hall, 2002.
[15] R. Krishnan, “Electric Motor Drives- Modeling, Analysis, and Control”, Prentice Hall, 2001.
[16] Muhammad H. Rashid, “Power Electronics Circuits, Devices, and Application”, Third Edition.
BIOGRAPHIES OF AUTHORS
Sandeep Ojhareceived the Bachelor of Technology in Electrical Engineering in 2013 from JSS
Academy of Technical Education Noida affiliated to Gautam Buddh Technical University,
Lucknow, Uttar Pradesh, India and currently pursuing Master of Technology in Power
Electronics and Drives from Madan Mohan Malaviya University of Technology, Gorakhpur,
Uttar Pradesh, India.
Ashok Kumar Pandey received the Bachelor of Engineering in Electrical Engineering in 1987
from Madan Mohan Malaviya University of Technology (Madan Mohan Malaviya Engineering
College) Gorakhpur, Uttar Pradesh, India and Master of Technology in Power Electronics,
Electrical Machines and Drives from Indian Institute of Technology Delhi, India in 1995 and
PhD. in Power Electronics, Electrical Machines and Drives from Indian Institute of Technology
Roorkee, India in 2003.