Download or read book A Zero Voltage Switching Boost Converter Using a Soft Switching Auxiliary Circuit with Reduced Conduction Losses written by Nikhil Jain and published by . This book was released on 2000 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Modern AC-DC power supplies utilize power factor correction in order to minimize the harmonics in the input current drawn from the utility. The Boost topology is the most popular topology for power factor correction today but it has some disadvantages like very high EMI due to reverse recovery of the boost diode and high switching losses caused by hard switching of the boost switch. Many variations of the original boost topology have been suggested to overcome these problems. The Zero Voltage Transition Boost converter is one such solution. In such a converter an auxiliary resonant circuit is employed which is activated only when the boost switch is turning on or off. This auxiliary circuit allows the boost switch to turn on and off under zero voltage conditions thus reducing the switching losses. However the auxiliary circuit might be very complex and conduction losses in it might offset the expected rise in efficiency. In this thesis a soft-switching boost power converter is proposed and analyzed. This converter reduces the EMI and increases the efficiency because the auxiliary circuit is itself soft-switching and has low conduction losses due to creative placement of the resonant capacitors. Characteristic curves are generated for the proposed converter which not only give valuable insight on the behavior of the converter but also aid in designing the converter. The feasibility of the proposed converter is examined by means of results obtained from an experimental prototype.

Download or read book Auxiliary Circuit assisted Soft Switching Techniques and Their Application to Power Converters written by Ranganathan Gurunathan and published by . This book was released on 1999 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The need to incorporate significant improvements in power supplies is driven by customer demands, industry requirements and regulatory standards. For reduction in size and weight, it is imperative to process the power at a higher switching frequency. High frequency processing of power requires soft switching techniques to reduce the switching losses. Many soft switching techniques are reported in the literature to enhance the high frequency operation of power supplies. This thesis proposes novel high frequency, auxiliary circuit assisted, (a) soft-switched boost converters and their application to DC-to- DC converters and AC-to-DC front-end power factor corrected converters; and (b) zero-voltage switching (ZVS) dc link DC-to-AC inverters. In auxiliary circuit assisted soft transition converters, the auxiliary circuit processes the power during switching transitions, creating a soft transition path. In most of the proposed converters in the literature, the auxiliary circuit suffers from severe switching losses and switching stress. Discontinuous current operation of the auxiliary circuit results in parasitic oscillations between the switch capacitance and the resonant inductors increasing the stress on the devices. A zero-current switching (ZCS) auxiliary circuit and ZVS auxiliary circuit are proposed in this thesis to achieve soft transitions for the main circuit. A ZCS auxiliary circuit assisted soft transition boost converter is proposed. Operating intervals of the proposed technique in various intervals of operation are analyzed. Design constraints and considerations are discussed. A 300 W dc-to-dc boost converter and a 600 W, ac-to-dc power factor correction front-end boost converter prototype models are built in the laboratory. The experimental results confirm the theory. The resonant inductor used in the auxiliary circuit is coupled weakly to the boost inductor. Although parasitic oscillations are reduced due to the coupling, they are not completely eliminated. Hence, RC snubbers are required to suppress the oscillations. A ZVS auxiliary circuit assisted soft transition boost converter is also presented. Operating intervals of the proposed converter in various intervals of operation are analyzed. As all the parasitic elements in the circuit are accounted, parasitic oscillations are eliminated. A 300 W dc-to-dc converter operating at 250 kHz is built in the laboratory to verify the theory. A modified gating scheme to utilize the soft switching auxiliary circuit in the main power processing is also proposed. A 600 W, 100 kHz, 380 V dc, operating with universal input line voltage, ac-to-dc power factor corrected (PFC) boost converter is built using the proposed technique with modified gating algorithm. Large signal analysis to analyze the soft switching characteristics of the proposed technique during load and input voltage transients is also presented. PSPICE simulation results are presented to verify the theory. The proposed converter maintains soft switching during load and input voltage transients. The proposed auxiliary network is also extended to a family of pulse width modulated (PWM) converters. A two-switch soft switching boost converter is derived from the proposed converter. By integrating the proposed auxiliary network with a full bridge inverter, a ZVS dc link voltage source inverter (VSI) is obtained. Operating intervals of the proposed inverter in various intervals of operation for the forward power flow and reverse power flow are presented. A modified unipolar switching scheme to achieve ZVS during reverse power flow is also presented. The voltage stress on the VSI is clamped to the dc bus voltage in the proposed converter. The conduction losses are reduced as compared to other soft switching converters in the literature. As the proposed technique requires synchronized PWM operation, sine-ramp modulated PWM signals are used. Experimental results from a 120 V, 60 Hz, 300 VA, single phase VSI switching at 50 kHz are presented to verify the theory.

Download or read book DC DC Converter Topologies written by Gerry Moschopoulos and published by John Wiley & Sons. This book was released on 2024-01-31 with total page 468 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive look at DC-DC converters and advanced power converter topologies for all skills levels As it can be rare for source voltage to meet the requirements of a Direct Current (DC) load, DC-DC converters are essential to access service. DC-DC power converters employ power semiconductor devices (like MOSFETs and IGBTs) as switches and passive elements such as capacitors, inductors, and transformers to alter the voltage provided by a DC source into the necessary DC voltage as is required by a DC load. This source can be a battery, solar panels, fuel cells, or a DC bus voltage fed by rectified AC utility voltage. As the many components of DC-DC converters can be differently arranged into circuit structures called topologies, there are as many possible circuit topologies as there are possible combinations of circuit elements. Focusing on DC-DC switch-mode power converters ranging from 50 W to 10kW, DC-DC Converter Topologies provides a survey of all converter topology types within this power range. General principles are described for each topology type using a representative converter as an example. Variations that can be found that differ from the example are then examined, with a helpful discussion of comparisons when relevant. A broad range of topics is covered within the book, from simple, low-power converters to complex, high-power converters and everywhere in between. DC-DC Converter Topologies readers will also find: A detailed discussion of four key DC-DC converter topologies Description of isolated two-switch pulse-width modulated (PWM) topologies including push-pull, half-bridge, and interleaved converters An exploration of high-gain converters such as coupled inductors, voltage multipliers, and switched capacitor converters This book provides the tools so that a non-expert will be equipped to deal with the vast array of DC-DC converters that presently exist. As such, DC-DC Converter Topologies is a useful reference for electrical engineers, professors, and graduate students studying in the field.

Download or read book Proceedings written by and published by Margret Schneider. This book was released on 2005 with total page 596 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Power Electronics and Renewable Energy Systems written by C. Kamalakannan and published by Springer. This book was released on 2014-11-19 with total page 1546 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book is a collection of high-quality peer-reviewed research papers presented in the Proceedings of International Conference on Power Electronics and Renewable Energy Systems (ICPERES 2014) held at Rajalakshmi Engineering College, Chennai, India. These research papers provide the latest developments in the broad area of Power Electronics and Renewable Energy. The book discusses wide variety of industrial, engineering and scientific applications of the emerging techniques. It presents invited papers from the inventors/originators of new applications and advanced technologies.

Download or read book Advanced Research on Industry Information System and Material Engineering IISME2012 written by Helen Zhang and published by Trans Tech Publications Ltd. This book was released on 2012-01-24 with total page 690 pages. Available in PDF, EPUB and Kindle. Book excerpt: In these proceedings are to be found original ideas and new insights on many aspects of Industry, information Systems and Materials Engineering. The conference was an excellent platform for researchers to exchange innovative ideas and new perspectives. The 140 papers are grouped into the following: 1: Industrial Technology, Materials Engineering and Dynamic Systems, 2: Industry, Manufacturing Technology and Mechanical Engineering, 3: Materials Science, Machine Systems and Production Systems and 4: Materials Engineering, Energy Science and Ecological Resources. Volume is indexed by Thomson Reuters CPCI-S (WoS).

Download or read book IEEE International Symposium on Industrial Electronics Proceedings written by and published by . This book was released on 2003 with total page 534 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Design and Implementation of Soft Switching Boost Converter written by Suresh Kumar Muppidi and published by LAP Lambert Academic Publishing. This book was released on 2012-04 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book introduces a novel soft-switching of boost converter by using ARCP method, which realizes the zero-current switching(ZCS) of the main and auxiliary switches and possesses the small power auxiliary circuit and full PWM capability. In the ZCS, the auxiliary switch is turned-on before the main switch is turned-on, the power circuit relies on the addition of an auxiliary switch, diode and inductor circuit to commutate the inductive load current from a main diode to an active device enabling a zero current turn-on of the main device. This book addresses the optimum selection of the auxiliary and main inductor control parameters for the boost converter with soft switching technique; the auxiliary inductor parameter is derived based on a minimization of the losses for both main and auxiliary switches.

Download or read book Energy Efficiency in Electric Motors Drives Power Converters and Related Systems written by Mario Marchesoni and published by MDPI. This book was released on 2020-06-25 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: Today, there is a great deal of attention focused on sustainable growth worldwide. The increase in efficiency in the use of energy may even, in this historical moment, bring greater benefit than the use of renewable energies. Electricity appears to be the most sustainable of energies and the most promising hope for a planet capable of growing without compromising its own health and that of its inhabitants. Power electronics and electrical drives are the key technologies that will allow energy savings through the reduction of energy losses in many applications. This Special Issue has collected several scientific contributions related to energy efficiency in electrical equipment. Some articles are dedicated to the use and optimization of permanent magnet motors, which allow obtaining the highest level of efficiency. Most of the contributions describe the energy improvements that can be achieved with power electronics and the use of suitable control techniques. Last but not least, some articles describe interesting solutions for hybrid vehicles, which were created mainly to save energy in the smartest way possible.

Download or read book Digital Technologies and Applications written by Saad Motahhir and published by Springer Nature. This book was released on 2021-06-26 with total page 1836 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gathers selected research papers presented at the First International Conference on Digital Technologies and Applications (ICDTA 21), held at Sidi Mohamed Ben Abdellah University, Fez, Morocco, on 29–30 January 2021. highlighting the latest innovations in digital technologies as: artificial intelligence, Internet of things, embedded systems, network technology, information processing, and their applications in several areas such as hybrid vehicles, renewable energy, robotic, and COVID-19. The respective papers encourage and inspire researchers, industry professionals, and policymakers to put these methods into practice.

Download or read book Zukunft durch Informationstechnik written by Informationstechnische Gesellschaft and published by Margret Schneider. This book was released on 2004 with total page 672 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book E Mobility written by M. Kathiresh and published by Springer Nature. This book was released on 2021-12-01 with total page 301 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book provides easy interpretable explanations for the key technologies involved in Electric Vehicles and Hybrid Electric Vehicles. The authors discuss the various electrical machines, drives, and controls used in EV and HEV. The book provides a detailed coverage of Regenerative Braking Systems used in EV and HEV. The book also illustrates the battery technology and battery management systems in EV and HEV. This book is intended for academicians, researchers and industrialists. In addition, this book has the following features Discusses the various Economic and Environmental Impact of Electric and Hybrid Electric Vehicles Discusses the role of Artificial Intelligence in Electric / Hybrid Electric Vehicles Illustrates the concept of Vehicle to Grid Technology and the smart charging station infrastructure and issues involved in the same Elucidates the concept of Internet of Vehicles Presents the latest research and applications in alternate energy vehicles

Download or read book Origin of Power Converters written by Tsai-Fu Wu and published by John Wiley & Sons. This book was released on 2020-04-14 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive guide to approaches to decoding, synthesizing and modeling pulse width modulation (PWM) converters Origin of Power Converters explores the original converter and provides a systematic examination of the development and modeling of power converters based on decoding and synthesizing approaches. The authors—noted experts on the topic—present an introduction to the origins of the converter and detail the fundamentals related to power the converter’s evolution. They cover a range of converter synthesis approaches, synthesis of multi-stage/multi-level converters, extension of hard-switching converters to soft-switching ones, and determination of switch-voltage stresses in the converters. In later chapters, this comprehensive resource reviews conventional two-port network theory and the state-space averaged (SSA) modeling approach, from which systematic modeling approaches are based on the graft switch technique. In addition, the book reviews the converter layer scheme and some fundamental circuit theories. This important book: • Contains a review of several typical transfer codes, such as step-down, step-up, step-up&-down, and ± step-up&-down • Describes the syntheses of pulse width modulation (PWM) converters such as voltage-fed z-source, current-fed z-source, quasi z-source, switched capacitor, and switched inductor converters • Presents two application examples based on previously proposed modeling approaches Written for academic researchers, graduate students, and seniors in power electronics, Origin of Power Converters provides a comprehensive understanding of the evolution of the converter and its applications.

Download or read book Proceedings of the Power Conversion Conference written by and published by . This book was released on 2002 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Soft Switching Converter For Photovoltaic Systems written by Prabin James and published by LAP Lambert Academic Publishing. This book was released on 2014-10-13 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: High-efficiency dc-dc converters with high-voltage gain have been researched due to increasing demands. Boost converter is one of the most important and widely used devices of modern power applications. They are required as an interface system between the low voltage sources and the load which requires higher voltage in many applications such as electric vehicles, uninterruptible power supplies, fuel cells, and photovoltaic systems .Till now boost converters with coupled inductors are used where switching losses are dissipated leading to higher switching losses and low overall efficiency. A conventional boost converter is often used in step-up applications due to its simple structure and low cost. However, it is not suitable for high step-up applications. Also, the severe reverse-recovery problem of the output diodes degrades system performance such as efficiency and electromagnetic noises. Boost converter with auxiliary resonant circuit can overcome these problems by either forcing current (ZCS) or voltage (ZVS) or both of them to zero. By adopting this topology the total efficiency of the system is improved. As boost converters are widely used these days therefore large amount.

Download or read book Proceedings of International Conference on Power Electronics and Drive Systems written by and published by . This book was released on 2005 with total page 972 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Improved Performance Soft Switching Switch Mode Power Supply written by Saha Shib Sankar and published by . This book was released on 2023-02-16 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: A modified version of new fully soft-switched boost converter suitable for active power factor correction has been developed in t This modified converter uses an auxiliary circuit consisting of less number of components than the earlier version. Both the switches of this converter turn on with ZCS and turn off with ZVS.