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Novel single phase pwm ac–ac converters solving commutation problem using switching cell structure and coupled inductor

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Final Year IEEE Projects for BE, B.Tech, ME, M.Tech,M.Sc, MCA & Diploma Students latest Java, .Net, Matlab, NS2, Android, Embedded,Mechanical, Robtics, VLSI, Power Electronics, IEEE projects are given absolutely complete working product and document providing with real time Software & Embedded training......
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Novel single phase pwm ac–ac converters solving commutation problem using switching cell structure and coupled inductor

  1. 1. OUR OFFICES @CHENNAI/ TRICHY/ KARUR / ERODE / MADURAI / SALEM / COIMBATORE / BANGALORE / HYDRABAD CELL: 9894917187 | 875487 1111 / 2111 / 3111 / 4111 / 5111 / 6111 Visit: www.ecwaytechnologies.com | www.ecwaypro jects.com Mail to: ecwaytechnologies@gmail.com ECWAY TECHNOLOGIES IEEE SOFTWARE | EMBEDDED | MECHANICAL | ROBOTICS PROJECTS DEVELOPMENT NOVEL SINGLE-PHASE PWM AC–AC CONVERTERS SOLVING COMMUTATION PROBLEM USING SWITCHING CELL STRUCTURE AND COUPLED INDUCTOR By A PROJECT REPORT Submitted to the Department of electronics & communication Engineering in the FACULTY OF ENGINEERING & TECHNOLOGY In partial fulfillment of the requirements for the award of the degree Of MASTER OF TECHNOLOGY IN ELECTRONICS & COMMUNICATION ENGINEERING APRIL 2016
  2. 2. OUR OFFICES @CHENNAI/ TRICHY/ KARUR / ERODE / MADURAI / SALEM / COIMBATORE / BANGALORE / HYDRABAD CELL: 9894917187 | 875487 1111 / 2111 / 3111 / 4111 / 5111 / 6111 Visit: www.ecwaytechnologies.com | www.ecwaypro jects.com Mail to: ecwaytechnologies@gmail.com ECWAY TECHNOLOGIES IEEE SOFTWARE | EMBEDDED | MECHANICAL | ROBOTICS PROJECTS DEVELOPMENT CERTIFICATE Certified that this project report titled “NOVEL SINGLE-PHASE PWM AC–AC CONVERTERS SOLVING COMMUTATION PROBLEM USING SWITCHING CELL STRUCTURE AND COUPLED INDUCTOR” is the bonafide work of Mr. _____________Who carried out the research under my supervision Certified further, that to the best of my knowledge the work reported herein does not form part of any other project report or dissertation on the basis of which a degree or award was conferred on an earlier occasion on this or any other candidate. Signature of the Guide Signature of the H.O.D Name Name
  3. 3. OUR OFFICES @CHENNAI/ TRICHY/ KARUR / ERODE / MADURAI / SALEM / COIMBATORE / BANGALORE / HYDRABAD CELL: 9894917187 | 875487 1111 / 2111 / 3111 / 4111 / 5111 / 6111 Visit: www.ecwaytechnologies.com | www.ecwaypro jects.com Mail to: ecwaytechnologies@gmail.com ECWAY TECHNOLOGIES IEEE SOFTWARE | EMBEDDED | MECHANICAL | ROBOTICS PROJECTS DEVELOPMENT DECLARATION I hereby declare that the project work entitled “NOVEL SINGLE-PHASE PWM AC–AC CONVERTERS SOLVING COMMUTATION PROBLEM USING SWITCHING CELL STRUCTURE AND COUPLED INDUCTOR” Submitted to BHARATHIDASAN UNIVERSITY in partial fulfillment of the requirement for the award of the Degree of MASTER OF APPLIED ELECTRONICS is a record of original work done by me the guidance of Prof.A.Vinayagam M.Sc., M.Phil., M.E., to the best of my knowledge, the work reported here is not a part of any other thesis or work on the basis of which a degree or award was conferred on an earlier occasion to me or any other candidate. (Student Name) (Reg.No) Place: Date:
  4. 4. OUR OFFICES @CHENNAI/ TRICHY/ KARUR / ERODE / MADURAI / SALEM / COIMBATORE / BANGALORE / HYDRABAD CELL: 9894917187 | 875487 1111 / 2111 / 3111 / 4111 / 5111 / 6111 Visit: www.ecwaytechnologies.com | www.ecwaypro jects.com Mail to: ecwaytechnologies@gmail.com ECWAY TECHNOLOGIES IEEE SOFTWARE | EMBEDDED | MECHANICAL | ROBOTICS PROJECTS DEVELOPMENT ACKNOWLEDGEMENT I am extremely glad to present my project “NOVEL SINGLE-PHASE PWM AC–AC CONVERTERS SOLVING COMMUTATION PROBLEM USING SWITCHING CELL STRUCTURE AND COUPLED INDUCTOR” which is a part of my curriculum of third semester Master of Science in Computer science. I take this opportunity to express my sincere gratitude to those who helped me in bringing out this project work. I would like to express my Director, Dr. K. ANANDAN, M.A.(Eco.), M.Ed., M.Phil.,(Edn.), PGDCA., CGT., M.A.(Psy.) of who had given me an opportunity to undertake this project. I am highly indebted to Co-Ordinator Prof. Muniappan Department of Physics and thank from my deep heart for her valuable comments I received through my project. I wish to express my deep sense of gratitude to my guide Prof. A.Vinayagam M.Sc., M.Phil., M.E., for her immense help and encouragement for successful completion of this project. I also express my sincere thanks to the all the staff members of Computer science for their kind advice. And last, but not the least, I express my deep gratitude to my parents and friends for their encouragement and support throughout the project.
  5. 5. OUR OFFICES @CHENNAI/ TRICHY/ KARUR / ERODE / MADURAI / SALEM / COIMBATORE / BANGALORE / HYDRABAD CELL: 9894917187 | 875487 1111 / 2111 / 3111 / 4111 / 5111 / 6111 Visit: www.ecwaytechnologies.com | www.ecwaypro jects.com Mail to: ecwaytechnologies@gmail.com ECWAY TECHNOLOGIES IEEE SOFTWARE | EMBEDDED | MECHANICAL | ROBOTICS PROJECTS DEVELOPMENT ABSTRACT: This paper presents novel single-phase pulse width modulation (PWM) ac–ac converters that can solve the commutation problem in single-phase directPWMac–ac converters without sensing the input voltage polarity. By using a basic switching cell structure and coupled inductors, the proposed ac–ac converters can be short- and open-circuited without damaging the switching devices. Neither lossy RC snubber nor dedicated soft commutation strategy is required in the proposed converter. By replacing the conventional phase-leg of the PWM ac–ac converters with the switching cell structure and the coupled inductor, three novel buck, boost, and buck- boost type PWM ac–ac converters are developed. Although two coupled inductors are required for the proposed converter, the input inductor of the proposed converter can be much smaller than that of the conventional PWM ac–ac converters. The volume of the magnetic components can be further reduced by increasing switching frequency of the converter because very fast recovery diodes can be selected externally. In order to verify performance and robustness of the proposed converter, a 200-W boost type prototype converter was built and tested with both mismatched gate signals and highly distorted input voltage
  6. 6. OUR OFFICES @CHENNAI/ TRICHY/ KARUR / ERODE / MADURAI / SALEM / COIMBATORE / BANGALORE / HYDRABAD CELL: 9894917187 | 875487 1111 / 2111 / 3111 / 4111 / 5111 / 6111 Visit: www.ecwaytechnologies.com | www.ecwaypro jects.com Mail to: ecwaytechnologies@gmail.com ECWAY TECHNOLOGIES IEEE SOFTWARE | EMBEDDED | MECHANICAL | ROBOTICS PROJECTS DEVELOPMENT INTRODUCTION: For AC–AC power conversion, the conventional approach is to use a diode or PWM rectifier followed by a PWM voltage-source inverter with a DC link. Other approaches include phase-controlled ac–ac converters employing thyristors, matrix converters, and so on. The output voltage and frequency can be varied with these structures. However, for applications where only voltage regulation is required, direct PWM ac–ac converters are a more practical choice in terms of cost and size. The ac–ac circuits shown in Fig. 1 have a common commutation problem. For example, for the buck-type converter, the switches S2 and S3 are both turned ON and OFF simultaneously, and they are complementary to the switches S1 and S4 in an ideal case. However, due to the different time delays and limited switching speed of the switching devices, there inherently exists a short dead-time or an overlap-time between switches. During the dead-time, there is no current path for the output filter inductor (Lo ), so the switches may be damaged by excessive voltage. Similarly, the switches may be damaged by excessive current when there is an overlap- time between switches S1 and S2 (or S3 and S4 ), because the input voltage will be short- circuited. Fig. 2 illustrates this problem. In order to solve this, bulky and lossy RC snubber circuits are required to protect the switches. A better way is to implement safe commutation strategies that provide smooth current transition. Several soft commutation strategies have been introduced and employed successfully in the circuits
  7. 7. OUR OFFICES @CHENNAI/ TRICHY/ KARUR / ERODE / MADURAI / SALEM / COIMBATORE / BANGALORE / HYDRABAD CELL: 9894917187 | 875487 1111 / 2111 / 3111 / 4111 / 5111 / 6111 Visit: www.ecwaytechnologies.com | www.ecwaypro jects.com Mail to: ecwaytechnologies@gmail.com ECWAY TECHNOLOGIES IEEE SOFTWARE | EMBEDDED | MECHANICAL | ROBOTICS PROJECTS DEVELOPMENT However, most of them solve the commutation problem by sensing the voltage or current polarity of the converter. When the voltage or current is distorted significantly, especially around the zero crossing point, the conventional methods still cannot provide completely safe and reliable commutation.
  8. 8. OUR OFFICES @CHENNAI/ TRICHY/ KARUR / ERODE / MADURAI / SALEM / COIMBATORE / BANGALORE / HYDRABAD CELL: 9894917187 | 875487 1111 / 2111 / 3111 / 4111 / 5111 / 6111 Visit: www.ecwaytechnologies.com | www.ecwaypro jects.com Mail to: ecwaytechnologies@gmail.com ECWAY TECHNOLOGIES IEEE SOFTWARE | EMBEDDED | MECHANICAL | ROBOTICS PROJECTS DEVELOPMENT EXISTING SYSTEM: The switches S2 and S3 are both turned ON and OFF simultaneously, and they are complementary to the switches S1 and S4 in an ideal case. However, due to the different time delays and limited switching speed of the switching devices, there inherently exists a short dead- time or an overlap-time between switches. During the dead-time, there is no current path for the output filter inductor (Lo), so the switches may be damaged by excessive voltage. Similarly, the switches may be damaged by excessive current when there is an overlap-time between switches S1 and S2 (or S3 and S4), because the input voltage will be short-circuited.
  9. 9. OUR OFFICES @CHENNAI/ TRICHY/ KARUR / ERODE / MADURAI / SALEM / COIMBATORE / BANGALORE / HYDRABAD CELL: 9894917187 | 875487 1111 / 2111 / 3111 / 4111 / 5111 / 6111 Visit: www.ecwaytechnologies.com | www.ecwaypro jects.com Mail to: ecwaytechnologies@gmail.com ECWAY TECHNOLOGIES IEEE SOFTWARE | EMBEDDED | MECHANICAL | ROBOTICS PROJECTS DEVELOPMENT PROPOSED SYSTEM: In this paper, very robust single-phase PWM ac–ac converters without the commutation problem are introduced. The proposed converters use basic switching cell structure and coupled inductors to implement phase legs of the converter. With this structure, the proposed converters can tolerate both dead-time and overlap-time without damaging switching devices. In addition, the proposed converters do not need to sense the voltage or current polarity for commutation. Therefore, highly robust and reliable PWM ac–ac converters can be developed.
  10. 10. OUR OFFICES @CHENNAI/ TRICHY/ KARUR / ERODE / MADURAI / SALEM / COIMBATORE / BANGALORE / HYDRABAD CELL: 9894917187 | 875487 1111 / 2111 / 3111 / 4111 / 5111 / 6111 Visit: www.ecwaytechnologies.com | www.ecwaypro jects.com Mail to: ecwaytechnologies@gmail.com ECWAY TECHNOLOGIES IEEE SOFTWARE | EMBEDDED | MECHANICAL | ROBOTICS PROJECTS DEVELOPMENT ADVANTAGES:  Stable operation even when the input voltage is highly distorted
  11. 11. OUR OFFICES @CHENNAI/ TRICHY/ KARUR / ERODE / MADURAI / SALEM / COIMBATORE / BANGALORE / HYDRABAD CELL: 9894917187 | 875487 1111 / 2111 / 3111 / 4111 / 5111 / 6111 Visit: www.ecwaytechnologies.com | www.ecwaypro jects.com Mail to: ecwaytechnologies@gmail.com ECWAY TECHNOLOGIES IEEE SOFTWARE | EMBEDDED | MECHANICAL | ROBOTICS PROJECTS DEVELOPMENT BLOCK DIAGRAM:
  12. 12. OUR OFFICES @CHENNAI/ TRICHY/ KARUR / ERODE / MADURAI / SALEM / COIMBATORE / BANGALORE / HYDRABAD CELL: 9894917187 | 875487 1111 / 2111 / 3111 / 4111 / 5111 / 6111 Visit: www.ecwaytechnologies.com | www.ecwaypro jects.com Mail to: ecwaytechnologies@gmail.com ECWAY TECHNOLOGIES IEEE SOFTWARE | EMBEDDED | MECHANICAL | ROBOTICS PROJECTS DEVELOPMENT TOOLS AND SOFTWARE USED:  MPLAB – microcontroller programming.  ORCAD – circuit layout.  MATLAB/Simulink – Simulation
  13. 13. OUR OFFICES @CHENNAI/ TRICHY/ KARUR / ERODE / MADURAI / SALEM / COIMBATORE / BANGALORE / HYDRABAD CELL: 9894917187 | 875487 1111 / 2111 / 3111 / 4111 / 5111 / 6111 Visit: www.ecwaytechnologies.com | www.ecwaypro jects.com Mail to: ecwaytechnologies@gmail.com ECWAY TECHNOLOGIES IEEE SOFTWARE | EMBEDDED | MECHANICAL | ROBOTICS PROJECTS DEVELOPMENT APPLICATIONS:  AC drives  Wind power applications
  14. 14. OUR OFFICES @CHENNAI/ TRICHY/ KARUR / ERODE / MADURAI / SALEM / COIMBATORE / BANGALORE / HYDRABAD CELL: 9894917187 | 875487 1111 / 2111 / 3111 / 4111 / 5111 / 6111 Visit: www.ecwaytechnologies.com | www.ecwaypro jects.com Mail to: ecwaytechnologies@gmail.com ECWAY TECHNOLOGIES IEEE SOFTWARE | EMBEDDED | MECHANICAL | ROBOTICS PROJECTS DEVELOPMENT CONCLUSION: In this paper, very robust single-phase buck, boost, and buckboost type PWM ac–ac converters have been proposed. Unlike the existing PWMac–ac converters, the proposed converters do not need to sense the input voltage polarity for safe commutation and the proposed converter can guarantee stable operation even when the input voltage is highly distorted, which is impossible with the conventional approach. Although two extra coupled inductors are required, the input inductor can be designed to be much smaller than that of the conventional ac– ac converter. The performance of the proposed converterwas successfully verified with the 200- W boost type ac–ac converter.
  15. 15. OUR OFFICES @CHENNAI/ TRICHY/ KARUR / ERODE / MADURAI / SALEM / COIMBATORE / BANGALORE / HYDRABAD CELL: 9894917187 | 875487 1111 / 2111 / 3111 / 4111 / 5111 / 6111 Visit: www.ecwaytechnologies.com | www.ecwaypro jects.com Mail to: ecwaytechnologies@gmail.com ECWAY TECHNOLOGIES IEEE SOFTWARE | EMBEDDED | MECHANICAL | ROBOTICS PROJECTS DEVELOPMENT REFERENCES: [1] F. Z. Peng, C. Lihua, and Z. Fan, “Simple topologies of PWM ac– ac converters,” IEEE Power Electron. Lett., vol. 1, no. 1, pp. 10–13, Mar. 2003. [2] B.H.Kwon, B. D. Min, and J.H.Kim, “Novel topologies ofACchoppers,” IEE Proc. Electr. Power Appl., vol. 143, no. 4, pp. 323–330, Jul. 1996. [3] F. Z. Peng, “Revisit power conversion circuit topologies-recent advances and applications,”in Proc. IEEE Int. Power Electr. Motion Conf., May 2009, pp. 188–192. [4] L. M. Tolbert, F. Z. Peng, F. H. Khan, and S. Li, “Switching cells and their implications for power electronic circuits,” in Proc. IEEE Int. Power Electr. Motion Conf., 2009, pp. 773–779. [5] F. H. Khan, L. M. Tolbert, and F. Z. Peng, “Deriving new topologies of DC–DC converters featuring basic switching cells,” Proc. IEEEWorkshop Comput. Power Electron., 2006, pp. 328– 332.

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