this paper gives idea of comparison of five phase two-level voltage inverter (FPTLVSI) without filter circuit and control scheme and FPTLVSI with filter circuit and PWM control scheme for induction motor drive. The paper demonstrates using mat lab simulations about comparison in term of harmonics analysis for different firing angles and find best angle suitable for output with minimum harmonics for FPTLVSI without filter circuit and control scheme and harmonics analysis of FPTLVSI with filter and PWM control scheme. This paper suggests simulation of comparison of harmonics point of view five phase two-level voltage inverter (FPTLVSI) without filter circuit and control scheme and with filter circuit and PWM control scheme for induction motor drive.
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.
Analysis and Implementation of Unipolar PWM Strategies for Three Phase Cascad...IJAAS Team
This paper presents unipolar pulse width modulation technique with sinusoidal sampling pulse width modulation are analyzed for three-phase five-level, seven-level, nine-level and eleven-level cascaded multi-level inverter. The unipolar PWM method offers a good opportunity for the realization of the Three-phase inverter control, it is better to use the unipolar PWM method with single carrier wave compared to two reference waves. In such case the motor harmonic losses will be considerably lower.The necessary calculations for generation of unipolar pulse width modulation strategies have presented in detail. The unipolar SPWM voltage switching scheme is selected in this paper because this method offers the advantages of effectively doubling the switching frequency of the inverter voltage. The cascaded multi level inverter fed induction motor is simulated and compared the total harmonic distroction for all level (five-level, seven-level, nine-level and elevel-level)of the inverter. Theoretical investigations were confirmed by the digital simulations using MATLAB/SIMULINK software.
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.
Analysis and Implementation of Unipolar PWM Strategies for Three Phase Cascad...IJAAS Team
This paper presents unipolar pulse width modulation technique with sinusoidal sampling pulse width modulation are analyzed for three-phase five-level, seven-level, nine-level and eleven-level cascaded multi-level inverter. The unipolar PWM method offers a good opportunity for the realization of the Three-phase inverter control, it is better to use the unipolar PWM method with single carrier wave compared to two reference waves. In such case the motor harmonic losses will be considerably lower.The necessary calculations for generation of unipolar pulse width modulation strategies have presented in detail. The unipolar SPWM voltage switching scheme is selected in this paper because this method offers the advantages of effectively doubling the switching frequency of the inverter voltage. The cascaded multi level inverter fed induction motor is simulated and compared the total harmonic distroction for all level (five-level, seven-level, nine-level and elevel-level)of the inverter. Theoretical investigations were confirmed by the digital simulations using MATLAB/SIMULINK software.
Modeling and Simulation of a Carrier-based PWM Voltage Source Inverter for a ...IAES-IJPEDS
The analysis of a carrier-based PWM two level voltage source inverter for a nine phase induction machine drive system is presented in this paper. Methods for generating zero-sequence signals during balanced and unbalanced condition are established. Simulation results for the analysis are presented. Two fault conditions involving the voltage source inverter and the nine-phase squirrel cage induction machine load are investigated. For the two fault scenarios considered, the effects on the performance characteristics of the induction machine load are highlighted. The simulation results obtained show that the two imbalance conditions considered result in substantial oscillations on the electromagnetic torque of the machine with attendant reduction in the torque rating. There is also large slip in the rotor speed.
SINGLE PHASE SYMMETRICAL MULTILEVEL INVERTER DESIGN FOR VARIOUS LOADSelelijjournal
This paper presents a single phase symmetrical multilevel inverter with various loads. This proposed
topology is connected with R-load, RL-load and induction motor drive with unipolar Phase disposition
PWM technique. Among the four modulation technique it gives reduced harmonic. This proposed topology
has less number of switches than the conventional one. In conventional cascaded multilevel inverter have
twelve switches and the proposed topology have eight switches. Totally the four switches have been
reduced from the conventional one. It is designed to produce a seven level output. The simulation analysis
has been done by a MATLAB/SIMULINK model.
The Operating Improvement of the Supply Source and the Optimization of PWM Co...IJPEDS-IAES
In this paper the operating improvement of the supply source and the
optimization of PWM control are proposed. A comparison (based on the
better operating in terms of input voltage) between the multilevel inverters
(NPC multilevel inverter and H bridge inverter) is studied. Then two control
strategies (the SPWM and the suboptimal PWM) are applied to the multilevel
inverter which has the better voltage performance. At last a comparison
between these two control techniques based on two essential points, the THD
and the output voltage value. A comparison between our results and results
taken from literature is also presented in this paper. Simulations are carried
out using PSIM environment.
This paper presents a MATLAB/SIMULINK model of two multi-level inverter topologies. Algorithms based on space vector modulation (SVM) technique are developed in order to conduct a comparative study on diode clamped five and seven level inverters. The scheme used to develop these control algorithms are based on symmetrical sequence because of the symmetry of the switching wave. Both topologies are simulated and analyzed using a squirrel cage induction motor. The results have showed that the best motor dynamic response with less harmonic distortion and torque fluctuations is obtained when seven-level inverter is employed.
Asymmetrical Cascaded Multi Level Inverter using Control Freedom Pulse width ...IAES-IJPEDS
In this paper, the suggested topologies are gained by cascading a full bridge inverter with dissimilar DC sources. This topology has several new patterns adopting the fixed switching frequency, multicarrier control freedom degree with mixture conceptions are established and simulated for the preferred three-phase cascaded multilevel inverter. In outstanding switching arrangement terminations, there are convinced degrees of freedom to produce the nine level AC output voltages with terminated switching positions for producing altered output voltages. These investigations focus on asymmetrical cascaded multilevel inverter engaging with carrier overlapping pulse width modulation (PWM) topologies. These topologies offer less amount of harmonics present in the output voltage and superior root mean square (RMS) values of the output voltages associated with the traditional sinusoidal pulse width modulation. This research studies carries with it MATLAB/SIMULINK based simulation and experimental results obtained using appropriated prototype to prove the validity of the proposed concept.
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.
Torque Ripple Minimization of a BLDC Motor Drive by Using Electronic Commutat...AI Publications
Brushless DC motors are having a major problem with harmonics in torque. The variations in speed and production of noise should be minimized by using proper topologies. BLDC motors have been gaining attention from different Industrial and domestic appliance manufacturers, because of their high efficiency, high power density and easy maintenance and low cost. This paper presents a three phase BLDC motor with low cost drive to be driven without DC link capacitor. The proposed technique uses an electronic commutation and operates the machine exclusive of the intermediate DC link capacitor. The designing of Brushless DC motor drive system along with control system for torque ripple minimization, speed controller and current controllers are presented using MATLAB / SIMULINK and results are evaluated.
Harmonics Reduction of Multilevel Inverter Drive Using Sine Carrier Pulse Wid...IJERA Editor
The main objective of this paper is to control the speed of an induction motor by using seven level diode clamped multilevel inverter and improve the high quality sinusoidal output voltage with reduced harmonics. The presented scheme for diode clamped multilevel inverter is sine carrier Pulse Width Modulation control. An open loop speed control can be achieved by using V/ƒ method. This method can be implemented by changing the supply voltage and frequency applied to the three phase induction motor at constant ratio. The presented system is an effective replacement for the conventional method which has high switching losses, its result ends in a poor drive performance. The simulation result portrays the effective control in the motor speed and an enhanced drive performance through reduction in total harmonic distortion (THD). The effectiveness of the system is verified through simulation using PSIM6.1 Simulink package
discusses about the reduction of commutation torque ripple in BLDC motor and various convention methods and the proposed method for 2 level inverter and 3 level inverter
Consists of two sets of windings:
3 phase armature winding on the stator distributed with centres 120° apart in space
field winding on the rotor supplied by DC
Two basic rotor structures used:
salient or projecting pole structure for hydraulic units (low speed)
round rotor structure for thermal units (high speed)
Salient poles have concentrated field windings; usually also carry damper windings on the pole face.Round rotors have solid steel rotors with distributed windings
Nearly sinusoidal space distribution of flux wave shape obtained by:
distributing stator windings and field windings in many slots (round rotor);
shaping pole faces (salient pole)
A Novel Topology of Multilevel Inverter with Reduced Number of Switches and D...IAES-IJPEDS
This paper introduces new topology of cascaded multilevel inverter, with considerable reduction in the number of switches and DC voltage sources. The proposed topology is based on asymmetrical multilevel inverter which produces 21 levels of output with the use of 11 unidirectional switches, 3 diodes and 4 DC voltage sources. The advantages of this topology are reduction in the number of switches (2 nos.) and gate driver circuits (2 nos.), reduction in the number of DC sources (2 nos.) also cost, complexity, and space required for hardware is reduced without sacrificing the quality output of the inverter. To reduce the THD further Level shifting SPWM techniques such as PD, POD & APOD are used and comparison is shown on the basis of THDs obtained from the above SPWM techniques. Frequency of carrier waves is 1KHz, and modulation index is 1.0. To validate the proposed topology the circuit is simulated and verified by using MATLAB/Simulink.
Multi Carrier based Multilevel Inverter with Minimal Harmonic DistortionIJPEDS-IAES
This paper presents performance features of Asymmetric Cascaded
Multilevel inverter. Multilevel inverters are commonly modulated by using
multicarrier pulse width modulation (MCPWM) techniques such as phaseshifted
multicarrier modulation and level-shifted multicarrier modulation.
Amongst these, level-shifted multicarrier modulation technique produces the
best harmonic performance. This work studies about multilevel inverter with
unequal DC sources using level shifting MCPWM technique. The
Performances indices like Total Harmonic Distortion (THD), number of
switches and DC Sources are considered. A procedure to achieve an
appropriate level shifting is also presented is this paper.
Electrical Discharge Machining Flyback Converter using UC3842 Current Mode PW...IJPEDS-IAES
This paper presents a current mode Pulse Width Modulation (PWM) controlled Flyback converter using UC3842 for Electrical Discharge Machining current generator control circuit. Circuit simplicity and high efficiency can be achieved by a Flyback converter with current mode PWM controller. The behaviors of the system's operation is analyzed and discussed by varying the load resistance. Matlab sofware is used to simulate the Flyback converter where a prototype has been built and tested to verify its performance.
This paper proposed a new sparce matrix converter with Z-source network to provide unity voltage transfer ratio. It is an ac-to-ac converter with diode-IGBT bidirectional switches. The limitations of existing matrix converter like higher current THD and less voltage transfer ratio issues are overcome by this proposed matrix converter by inserting a Z-source. Due to this Z-source current harmonics are totally removed. The simulation is performed for different frequencies. The simulation results are presented to verify the THD and voltage transfer ratio and compared with the existing virtual AC/DC/AC matrix converter. The experimental output voltage amplitude can be varied with the variable frequencies.
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 introduces a new topology of multilevel inverter, which is able to operate at high performance. This proposed circuit achieves requirements of reduced number of switches, gate-drive circuits, and high design flexibility. In most cases fifteen-level inverters need at least twelve switches. The proposed topology has only ten switches. The inverter has a quasi-sine output voltage, which is formed by level generator and polarity changer to produce the desired voltage and current waveforms. The detailed operation of the proposed inverter is explained. The theoretical analysis and design procedure are given. Simulation results are presented to confirm the analytical approach of the proposed circuit. A 15-level and 31-level multilevel inverters were designed and tested at 50 Hz.
International Journal of Engineering Research and Development (IJERD)IJERD Editor
journal publishing, how to publish research paper, Call For research paper, international journal, publishing a paper, IJERD, journal of science and technology, how to get a research paper published, publishing a paper, publishing of journal, publishing of research paper, reserach and review articles, IJERD Journal, How to publish your research paper, publish research paper, open access engineering journal, Engineering journal, Mathemetics journal, Physics journal, Chemistry journal, Computer Engineering, Computer Science journal, how to submit your paper, peer reviw journal, indexed journal, reserach and review articles, engineering journal, www.ijerd.com, research journals,
yahoo journals, bing journals, International Journal of Engineering Research and Development, google journals, hard copy of journal
A novel three phase bidirectional AC buck converter circuit using power
MOSFET is analyzed for input power factor, harmonic profile and efficiency of the
converter for power quality improvement. The equal PWM (EPWM) technique is a used to
increase number of pulses per half cycle (P) in order to vary these parameters. The rms
value of the fundamental component of the output voltage can be increased by varying the
duty ratio (K) of the pulses. It is observed from the simulation results obtained using
MATLAB/simulink that the proposed scheme using EPWM technique significantly reduces
low order harmonics, eliminates certain harmonics for certain values of P, improves input
power factor and hence significantly reduces the filter size of the converter.
Modeling and Simulation of a Carrier-based PWM Voltage Source Inverter for a ...IAES-IJPEDS
The analysis of a carrier-based PWM two level voltage source inverter for a nine phase induction machine drive system is presented in this paper. Methods for generating zero-sequence signals during balanced and unbalanced condition are established. Simulation results for the analysis are presented. Two fault conditions involving the voltage source inverter and the nine-phase squirrel cage induction machine load are investigated. For the two fault scenarios considered, the effects on the performance characteristics of the induction machine load are highlighted. The simulation results obtained show that the two imbalance conditions considered result in substantial oscillations on the electromagnetic torque of the machine with attendant reduction in the torque rating. There is also large slip in the rotor speed.
SINGLE PHASE SYMMETRICAL MULTILEVEL INVERTER DESIGN FOR VARIOUS LOADSelelijjournal
This paper presents a single phase symmetrical multilevel inverter with various loads. This proposed
topology is connected with R-load, RL-load and induction motor drive with unipolar Phase disposition
PWM technique. Among the four modulation technique it gives reduced harmonic. This proposed topology
has less number of switches than the conventional one. In conventional cascaded multilevel inverter have
twelve switches and the proposed topology have eight switches. Totally the four switches have been
reduced from the conventional one. It is designed to produce a seven level output. The simulation analysis
has been done by a MATLAB/SIMULINK model.
The Operating Improvement of the Supply Source and the Optimization of PWM Co...IJPEDS-IAES
In this paper the operating improvement of the supply source and the
optimization of PWM control are proposed. A comparison (based on the
better operating in terms of input voltage) between the multilevel inverters
(NPC multilevel inverter and H bridge inverter) is studied. Then two control
strategies (the SPWM and the suboptimal PWM) are applied to the multilevel
inverter which has the better voltage performance. At last a comparison
between these two control techniques based on two essential points, the THD
and the output voltage value. A comparison between our results and results
taken from literature is also presented in this paper. Simulations are carried
out using PSIM environment.
This paper presents a MATLAB/SIMULINK model of two multi-level inverter topologies. Algorithms based on space vector modulation (SVM) technique are developed in order to conduct a comparative study on diode clamped five and seven level inverters. The scheme used to develop these control algorithms are based on symmetrical sequence because of the symmetry of the switching wave. Both topologies are simulated and analyzed using a squirrel cage induction motor. The results have showed that the best motor dynamic response with less harmonic distortion and torque fluctuations is obtained when seven-level inverter is employed.
Asymmetrical Cascaded Multi Level Inverter using Control Freedom Pulse width ...IAES-IJPEDS
In this paper, the suggested topologies are gained by cascading a full bridge inverter with dissimilar DC sources. This topology has several new patterns adopting the fixed switching frequency, multicarrier control freedom degree with mixture conceptions are established and simulated for the preferred three-phase cascaded multilevel inverter. In outstanding switching arrangement terminations, there are convinced degrees of freedom to produce the nine level AC output voltages with terminated switching positions for producing altered output voltages. These investigations focus on asymmetrical cascaded multilevel inverter engaging with carrier overlapping pulse width modulation (PWM) topologies. These topologies offer less amount of harmonics present in the output voltage and superior root mean square (RMS) values of the output voltages associated with the traditional sinusoidal pulse width modulation. This research studies carries with it MATLAB/SIMULINK based simulation and experimental results obtained using appropriated prototype to prove the validity of the proposed concept.
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.
Torque Ripple Minimization of a BLDC Motor Drive by Using Electronic Commutat...AI Publications
Brushless DC motors are having a major problem with harmonics in torque. The variations in speed and production of noise should be minimized by using proper topologies. BLDC motors have been gaining attention from different Industrial and domestic appliance manufacturers, because of their high efficiency, high power density and easy maintenance and low cost. This paper presents a three phase BLDC motor with low cost drive to be driven without DC link capacitor. The proposed technique uses an electronic commutation and operates the machine exclusive of the intermediate DC link capacitor. The designing of Brushless DC motor drive system along with control system for torque ripple minimization, speed controller and current controllers are presented using MATLAB / SIMULINK and results are evaluated.
Harmonics Reduction of Multilevel Inverter Drive Using Sine Carrier Pulse Wid...IJERA Editor
The main objective of this paper is to control the speed of an induction motor by using seven level diode clamped multilevel inverter and improve the high quality sinusoidal output voltage with reduced harmonics. The presented scheme for diode clamped multilevel inverter is sine carrier Pulse Width Modulation control. An open loop speed control can be achieved by using V/ƒ method. This method can be implemented by changing the supply voltage and frequency applied to the three phase induction motor at constant ratio. The presented system is an effective replacement for the conventional method which has high switching losses, its result ends in a poor drive performance. The simulation result portrays the effective control in the motor speed and an enhanced drive performance through reduction in total harmonic distortion (THD). The effectiveness of the system is verified through simulation using PSIM6.1 Simulink package
discusses about the reduction of commutation torque ripple in BLDC motor and various convention methods and the proposed method for 2 level inverter and 3 level inverter
Consists of two sets of windings:
3 phase armature winding on the stator distributed with centres 120° apart in space
field winding on the rotor supplied by DC
Two basic rotor structures used:
salient or projecting pole structure for hydraulic units (low speed)
round rotor structure for thermal units (high speed)
Salient poles have concentrated field windings; usually also carry damper windings on the pole face.Round rotors have solid steel rotors with distributed windings
Nearly sinusoidal space distribution of flux wave shape obtained by:
distributing stator windings and field windings in many slots (round rotor);
shaping pole faces (salient pole)
A Novel Topology of Multilevel Inverter with Reduced Number of Switches and D...IAES-IJPEDS
This paper introduces new topology of cascaded multilevel inverter, with considerable reduction in the number of switches and DC voltage sources. The proposed topology is based on asymmetrical multilevel inverter which produces 21 levels of output with the use of 11 unidirectional switches, 3 diodes and 4 DC voltage sources. The advantages of this topology are reduction in the number of switches (2 nos.) and gate driver circuits (2 nos.), reduction in the number of DC sources (2 nos.) also cost, complexity, and space required for hardware is reduced without sacrificing the quality output of the inverter. To reduce the THD further Level shifting SPWM techniques such as PD, POD & APOD are used and comparison is shown on the basis of THDs obtained from the above SPWM techniques. Frequency of carrier waves is 1KHz, and modulation index is 1.0. To validate the proposed topology the circuit is simulated and verified by using MATLAB/Simulink.
Multi Carrier based Multilevel Inverter with Minimal Harmonic DistortionIJPEDS-IAES
This paper presents performance features of Asymmetric Cascaded
Multilevel inverter. Multilevel inverters are commonly modulated by using
multicarrier pulse width modulation (MCPWM) techniques such as phaseshifted
multicarrier modulation and level-shifted multicarrier modulation.
Amongst these, level-shifted multicarrier modulation technique produces the
best harmonic performance. This work studies about multilevel inverter with
unequal DC sources using level shifting MCPWM technique. The
Performances indices like Total Harmonic Distortion (THD), number of
switches and DC Sources are considered. A procedure to achieve an
appropriate level shifting is also presented is this paper.
Electrical Discharge Machining Flyback Converter using UC3842 Current Mode PW...IJPEDS-IAES
This paper presents a current mode Pulse Width Modulation (PWM) controlled Flyback converter using UC3842 for Electrical Discharge Machining current generator control circuit. Circuit simplicity and high efficiency can be achieved by a Flyback converter with current mode PWM controller. The behaviors of the system's operation is analyzed and discussed by varying the load resistance. Matlab sofware is used to simulate the Flyback converter where a prototype has been built and tested to verify its performance.
This paper proposed a new sparce matrix converter with Z-source network to provide unity voltage transfer ratio. It is an ac-to-ac converter with diode-IGBT bidirectional switches. The limitations of existing matrix converter like higher current THD and less voltage transfer ratio issues are overcome by this proposed matrix converter by inserting a Z-source. Due to this Z-source current harmonics are totally removed. The simulation is performed for different frequencies. The simulation results are presented to verify the THD and voltage transfer ratio and compared with the existing virtual AC/DC/AC matrix converter. The experimental output voltage amplitude can be varied with the variable frequencies.
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 introduces a new topology of multilevel inverter, which is able to operate at high performance. This proposed circuit achieves requirements of reduced number of switches, gate-drive circuits, and high design flexibility. In most cases fifteen-level inverters need at least twelve switches. The proposed topology has only ten switches. The inverter has a quasi-sine output voltage, which is formed by level generator and polarity changer to produce the desired voltage and current waveforms. The detailed operation of the proposed inverter is explained. The theoretical analysis and design procedure are given. Simulation results are presented to confirm the analytical approach of the proposed circuit. A 15-level and 31-level multilevel inverters were designed and tested at 50 Hz.
International Journal of Engineering Research and Development (IJERD)IJERD Editor
journal publishing, how to publish research paper, Call For research paper, international journal, publishing a paper, IJERD, journal of science and technology, how to get a research paper published, publishing a paper, publishing of journal, publishing of research paper, reserach and review articles, IJERD Journal, How to publish your research paper, publish research paper, open access engineering journal, Engineering journal, Mathemetics journal, Physics journal, Chemistry journal, Computer Engineering, Computer Science journal, how to submit your paper, peer reviw journal, indexed journal, reserach and review articles, engineering journal, www.ijerd.com, research journals,
yahoo journals, bing journals, International Journal of Engineering Research and Development, google journals, hard copy of journal
A novel three phase bidirectional AC buck converter circuit using power
MOSFET is analyzed for input power factor, harmonic profile and efficiency of the
converter for power quality improvement. The equal PWM (EPWM) technique is a used to
increase number of pulses per half cycle (P) in order to vary these parameters. The rms
value of the fundamental component of the output voltage can be increased by varying the
duty ratio (K) of the pulses. It is observed from the simulation results obtained using
MATLAB/simulink that the proposed scheme using EPWM technique significantly reduces
low order harmonics, eliminates certain harmonics for certain values of P, improves input
power factor and hence significantly reduces the filter size of the converter.
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
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
Analysis approach for three phase two level voltage source inverter and five ...eSAT Journals
Abstract
This paper gives idea of comparison of three phase two-level voltage source inverter (TPTLVSI) and five phase two-level voltage
inverter (FPTLVSI) without filter circuit for induction motor drive. The paper demonstrates using mat lab simulations about
comparison in term of harmonics analysis for different firing angles and find best angle suitable for output with minimum harmonics
for FPTLVSI. This paper suggests simulation of comparison point of view three phase two-level voltage inverter (TPTLVSI) and five
phase two-level voltage inverter (FPTLVSI) for induction motor drive.
Index Terms: Modeling of Three phase two-level voltage inverter (TPTLVSI) and five phase two-level voltage inverter
(FPTLVSI)
Computer Science
Active and Programmable Networks
Active safety systems
Ad Hoc & Sensor Network
Ad hoc networks for pervasive communications
Adaptive, autonomic and context-aware computing
Advance Computing technology and their application
Advanced Computing Architectures and New Programming Models
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Agent-based middleware
Alert applications
Automotive, marine and aero-space control and all other control applications
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Communication architectures for pervasive computing
Communication systems
Computational intelligence
Computer and microprocessor-based control
Computer Architecture and Embedded Systems
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Computer-based information systems in health care
Computing Ethics
Computing Practices & Applications
Congestion and/or Flow Control
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Electronic transceiver device for Retail Marketing Industries
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Emerging advances in business and its applications
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Estimation and identification techniques
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Event-based, publish/subscribe, and message-oriented middleware
Evolutionary computing and intelligent systems
Expert approaches
Facilities planning and management
Flexible manufacturing systems
Formal methods and tools for designing
Fuzzy algorithms
Fuzzy logics
GPS and location-based app
Report On diode clamp three level inverterVinay Singh
three level diode clamp inverter. that converts any type of DC ( rectified, PV cell, battery etc.) to AC supply. we made by mosfet and ardiuno . in this ppt we present the Simulink model of a three-level inverter and the hardware reort of the inverter.
also discuss about other level inverter and there THD analysis, simulink model and detail. compression between another inverter.
Dual inverter fed induction motor drives provide more advantages in contrast with other multilevel inverter drives. Coupled PWM techniques provide good standard of output voltage than the decoupled PWM techniques for dual inverter configuration. In this paper analysis of open end winding induction motor by coupled random PWM signals and decoupled SVPWM signals was carried out. Induction motor by random PWM technique generate low acoustic noise and electromagnetic interference to near by systems. The performance evaluation of the drive wss implemented in MATLAB/simulink and the results were presented.
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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.
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Analysis Approach for Five Phase Two-Level Voltage Source Inverter with PWM Technique for Induction Motor Drive
1. IJSRD - International Journal for Scientific Research & Development| Vol. 1, Issue 3, 2013 | ISSN (online): 2321-0613
All rights reserved by www.ijsrd.com 488
Analysis Approach for Five Phase Two-Level Voltage Source Inverter
with PWM Technique for Induction Motor Drive
Ankur P. Desai1
Vijay G. Bhuva2
1
Student 2
Assitant Professor
1,2
Shantilal Shah Engineering College, Bhavnagar, Gujarat, India
Abstract— this paper gives idea of comparison of five phase
two-level voltage inverter (FPTLVSI) without filter circuit
and control scheme and FPTLVSI with filter circuit and
PWM control scheme for induction motor drive. The paper
demonstrates using mat lab simulations about comparison in
term of harmonics analysis for different firing angles and
find best angle suitable for output with minimum harmonics
for FPTLVSI without filter circuit and control scheme and
harmonics analysis of FPTLVSI with filter and PWM
control scheme. This paper suggests simulation of
comparison of harmonics point of view five phase two-level
voltage inverter (FPTLVSI) without filter circuit and control
scheme and with filter circuit and PWM control scheme for
induction motor drive.
Keywords: Modelling of five phase two-level voltage
inverter (FPTLVSI), PWM control scheme for FPTLVSI
I. INTRODUCTION
RESEARCH interest in the area of multiphase machines has
been steadily increasing over the past decade [1].The newest
developments are application-driven (marine electric
propulsion, electric vehicles (EVs) and hybrid electric
vehicles (HEVs), more electric aircraft, locomotive traction,
and high-power applications in general) and the
consequence of the advantages offered by multiphase
machines, when compared to the three-phase equivalents.
These are predominantly related to the possibility of
reduction of the converter per-phase rating for the given
machine power and to significantly improved fault
tolerance, since an n-phase machine can continue to operate
with a rotating field as long as no more than (n-3) phases are
faulted. A further advantage exists if the multiphase
machine is designed with concentrated stator windings,
since it then becomes possible to enhance the torque
production by injection of the low-order stator current
harmonics of an appropriate order. Five phase induction
machine drive.
Fig.1: Block diagram of five phase induction motor drive
A simple open-loop five-phase drive structure is
elaborated in. The dc link voltage is adjusted from the
controlled rectifier by varying the conduction angles of the
thyristors. The frequency of the fundamental output is
controlled from the IGBT based voltage source inverter. The
subsequent section describes the implantation issues of
control of a five-phase voltage source inverter. The
motivation behind choosing this structure lies in the fault
tolerant nature of a five-phase drive system. It has been
advantage of five phase induction motor drive like reduction
in phase current, reliable in faulty conditions, reduction in
current ripple.
II. BLOCK DIAGRAM FIVE PHASE TWO LEVEL
VOLTAGE SOURCE INVERTER MODEL
As shown in fig.2 each switch in the circuit consists of two
power semiconductor devices connected in anti-parallel.
One of these is a fully controllable semiconductor, such as a
bipolar transistor, MOSFET, or IGBT, while the second is a
diode.
Fig. 2: Power Circuit topology of a FPTLVSI
The upper and lower power switches of the same
leg are complimentary in operation, i.e. if the upper switch
is ‘ON’ the lower must be ‘OFF,’ and vice-versa. As shown
in fig.3, Dead time is done to avoid shorting the DC supply.
Fig. 3: Illustration for dead time
2. Analysis Approach for Five Phase Two-Level Voltage Source Inverter with PWM Technique for Induction Motor Drive
(IJSRD/Vol. 1/Issue 3/2013/0021)
All rights reserved by www.ijsrd.com 489
III. HARMONICS ANALYSIS OF FPTLVSI.
This section presents the comprehensive analysis of
simulation results. The performance of two different
conduction modes are elaborated in terms of the harmonic
content in the phase voltages, line voltages and the
distortion in the ac side line current.
The Fourier series of the phase-to-neutral voltage
for 180° conduction mode is obtained as;
1
sin sin3
3
2 1 1
sin 7 sin9
7 9
1
sin11 .....
11
dc
t t
V t t t
t
V
… (1)
From above equation (1) it follows that the
fundamental component of the output phase-to-neutral
voltage has an RMS value equal to
1
2
0.45dc dcV V V
… (2)
The Fourier series of the phase-to-neutral voltage
for 120° conduction mode is obtained as;
1,2,3,..
cos 2 1 sin 2 1
2 10
( )
2 1
dc
n
n n t
V t
n
V
… (3)
From above equation (3) it follows that
the fundamental component of the output phase-to-neutral
voltage has an RMS value equal to
1
2
cos 0.428
10dc dcV V V
… (4)
As per the equation of (4) loss in fundamental
voltage in 120° conduction mode is of the order of 4.89%
compared to 180° conduction mode. This loss will affect the
loss of torque in the driven machine and subsequently the
load will be affected. However, the drop in the torque is not
very significant compared to the benefits obtained due to
better harmonic performance.
Performance comparison in terms of harmonic
content in output phase voltage, for different conduction
modes are presented in fig.10 to 11. It is clearly seen that the
harmonic content reduces significantly with reduction in
conduction angle. The harmonic content is largest in 180
degree conduction mode and it is least in 120 degree
conduction mode. However, the best utilization of available
dc link voltage is possible with conventional ten step mode
(180 degree conduction mode). It can thus be concluded that
a trade-off exist between the loss in fundamental and
corresponding gain in terms of lower harmonic content in
output waveform is obtained by using 120 degree
conduction mode.
A comparison of total harmonic distortion in the
output phase voltages of five-phase voltage source inverter
for different conduction angle is presented. The conduction
angles considered are 180°, 162°, 144°, 126°, and 108°.
Thus two more conduction states are included when
compared to further prove the superiority of control at 120°
conduction mode. It is observed that the lowest THD is
obtained for 120° conduction mode.
Fig.4 is also mat lab simulation of FPTLVSI with
balance resistive load. It can be simulated and analysis for
different firing angles and takes measurement of harmonics
behavior.
Following Table: 1 shows THD Vs different firing
angles for FPTLVSI without any filter circuit.
Fig.4: Matlab/simulink of FPTLVSI
Firing anglesTHD(Total Harmonics Distortion)
108 53.63
110 49.96
115 47.3
118 36.99
120 27.03
125 36.28
126 35.68
130 38.51
144 42.98
180 46.68
Table. 1: Different firing angles and related THD for
harmonic analysis of FPTLVSI
Fig.5 curve of different firing angles and related THD for
harmonic analysis of FPTLVSI
0
20
40
60
0 100 200
THD
Firing Angle of FPTLVSI without Filter
circuit
Harmonics Analysis of
FPTLVSI without
Filter Circuit
Series1
3. Analysis Approach for Five Phase Two-Level Voltage Source Inverter with PWM Technique for Induction Motor Drive
(IJSRD/Vol. 1/Issue 3/2013/0021)
All rights reserved by www.ijsrd.com 490
IV. THE CARRIER-BASED PULSE WIDTH
MODULATION (PWM) TECHNIQUE FOR FIVE PHASE
INDUCTION MOTOR DRIVE
Fig. 6: Single phase half –bridge VSI
As mentioned earlier, it is desired that the ac output
voltage, o aNv v
follow a given waveform (e.g.
sinusoidal) on a continuous basis by properly switching the
power valves. The carrier-based PWM technique fulfils such
a requirement as it defines the on- and off-states of the
switches of one leg of a VSI by comparing a modulating
signal cv (desired ac output voltage) and a triangular
waveform v (carrier signal). In practice, when cv v
the switch S+ is on and the switch S− is off; similarly, when
cv < v the switch S+ is off and the switch S− is on.
A special case is when the modulating signal cv
is a sinusoidal at frequency c
f and amplitude cv , and the
triangular signal v is at frequency f and amplitude
v . This is the sinusoidal PWM (SPWM) scheme. In this
case, the modulation index am (also known as the
amplitude-modulation ratio) is defined as
c
a
v
m
v
… (1)
And the normalized carrier frequency fm (also known as
the frequency-modulation ratio) is
f
c
f
m f
… (2)
Figure 7 clearly shows that the ac output voltage
0 aNv v is basically a sinusoidal waveform plus
harmonics, which features: (a) the amplitude of the
fundamental component of the ac output voltage 01v
satisfying the following expression:
01 1
2
i
aN a
v
v v m …(3)
for am ≤ 1, which is called the linear region of
the modulating technique (higher values of ma leads to over
modulation); (b) for odd values of the normalized carrier
frequency fm the harmonics in the ac output voltage
appear at normalized frequencies h
f centred around and
fm its multiples, specifically,
f
h l km 1,2,3,.....l
… (4)
Where 2,4,6,...k
For 1,3,5,.....l
And 1,3,5,...k
Fig. 7: The half-bridge VSI. Ideal waveforms for the SPWM
( am = 0.8, fm = 9): (a) carrier and modulating signals;
(b) switch S+ state;(c) switch S− state; (d) ac output voltage;
(e) ac output voltage spectrum; (f) ac output current; (g) dc
current; (h) dc current spectrum; (i) switch S+ current; and
(j) diode D+ current.
for l = 2, 4, 6,…; the amplitude of the ac output
voltage harmonics is a function of the modulation index
am and is independent of the normalized carrier frequency
fm for fm > 9; (d) the harmonics in the dc link current
(due to the modulation) appear at normalized frequencies
p
f centered around the normalized carrier frequency fm
and its multiples, specifically,
4. Analysis Approach for Five Phase Two-Level Voltage Source Inverter with PWM Technique for Induction Motor Drive
(IJSRD/Vol. 1/Issue 3/2013/0021)
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1f
p l km 1,2,3,.....l
(5)
Where 2,4,6,...k
For 1,3,5,.....l
And
1,3,5,...k
l = 2, 4, 6, … Additional important issues are: (a)
for small values of fm ( fm < 21), the carrier signal
v and the signal cv should be synchronized to each
other ( fm integer), which is required to hold the previous
features; if this is not the case, sub harmonics will be present
in the ac output voltage.
The PWM technique allows an ace output voltage
to be generated that tracks a given modulating signal. A
special case is the SPWM technique (the modulating signal
is a sinusoidal) that provides, in the linear region, an ac
output voltage that varies linearly as a function of the
modulation index, and the harmonics are at well-defined
frequencies and amplitudes. These features simplify the
design of filtering components. Unfortunately, the
maximum amplitude of the fundamental ac voltage is iv /2
in this operating mode. Higher voltages are obtained by
using the over modulation region ( am > 1); however, low-
order harmonics appear in the ac output voltage. Very large
values of the modulation index ( am > 3.24) lead to a
totally square ac output voltage that is considered as the
square-wave modulating technique
Matlab simulink model of five phase two-level
voltage source inverter with PWM technique
Fig. 8: Matlab/simulink model for PWM Method of
five phase induction motor drive
V. RESULTS
Matlab/simulation results of three phase two-level voltage
source inverter and five phase two-level voltage source
Simulation results of for TPTLVSI and FPTLVSI
the operating conditions given below are shown in Fig.7 to
fig.11. Simulation results show output phase voltages, line
voltage currents, gate triggering, load current, harmonics
analysis for five phase two level voltage inverter.
Operating condition:
Simulation time: 0.02 sec
DC Link Voltage Vdc=200 V before running simulation
given in command prompt.
Freq=50 Hz running simulation given in command prompt.
Fig. 9: Matlab/simulation results for output phase voltages
of Three phase two-level voltage source inverter and five
phase two-level voltage source
Fig. 10: Matlab/simulation results for output load currents of
three phase two-level voltage source inverter and five phase
two-level voltage source
Fig.11: Matlab/simulation results for Input signal, carrier
signal and PWM method
5. Analysis Approach for Five Phase Two-Level Voltage Source Inverter with PWM Technique for Induction Motor Drive
(IJSRD/Vol. 1/Issue 3/2013/0021)
All rights reserved by www.ijsrd.com 492
Fig. 12: Matlab/simulation results for output voltages
(without filter) of five phase two-level VSI
Fig. 13: Matlab/simulation results for output voltages (with
filter and PWM control scheme) of five phase two-level VSI
Fig.14: Matlab/simulation results for FFT analysis output
voltages (with filter and PWM control scheme) of five phase
two-level VSI
VI. CONCLUSION
A comparison of total harmonic distortion in the output
phase voltages of five-phase voltage source inverter for
different conduction angle is presented. The conduction
angles considered are 180°, 162°, 144°, 126°, and 108°.
Thus two more conduction states are included when
compared to further prove the superiority of control at 120°
conduction mode. It is observed that the lowest THD is
obtained for 120° conduction mode.
Harmonic analysis of output line voltages of one
of the phase of FPTLVSI without any control scheme and
filter is carried out with different firing angle of gating
circuit of FPTLVSI and result is obtained that at 1200
optimal value of THD of line voltage of 27.03.
Harmonic analysis of output line voltages of one of
the phase of FPTLVSI with PWM control scheme and filter
is carried out and result is obtained that THD of of output
line voltages of one of the phase of FPTLVSI is reduced
greatly with value of 3.65.
This paper has reviewed analytical approach for
five phases two level voltage inverter used in application of
induction motor drive.
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