Three-phase High-frequency Transformer Isolated Soft-switching DC-DC Resonant Converters PDF Download
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Author: Mohamed S. M. Almardy
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
There is an increasing demand for power converters with small size, light weight, high conversion efficiency and higher power density. Also, in many applications, there is a need for dc-to-dc converters to accept dc input voltage and provide regulated and/or isolated dc output voltage at a desired voltage level including telecommunications equipment, process control systems, and in industry applications. This thesis presents the analysis, design, simulation and experimental results of three-phase high-frequency transformer isolated resonant converters. The first converter presented is a three-phase LCC-type dc-dc resonant converter with capacitor output filter including the effect of the magnetizing inductance of the three-phase HF transformer. The equivalent ac load resistance is derived and the converter is analyzed by using approximation analysis approach. Base on this analysis, design curves have been obtained and a design example is given. Intusoft simulation results for the designed converter are given for various input voltage and for different load conditions. The experimental verification of the designed converter performance was established by building a 300 W rated power converter and the experimental results have been given. It is shown that the converter works in zero-voltage switching (ZVS) at various input voltage and different load conditions. A three-phase (LC)(L)-type dc-dc series-resonant converter with capacitive output filter has been proposed. Operation of the converter has been presented using the operating waveforms and equivalent circuit diagrams during different intervals. An approximate analysis approach is used to analyze the converter operation, and design procedure is presented with a design example. Intusoft simulation results for the designed converter are given for input voltage and load variations. Experimental results obtained in a 300 W converter are presented. Major advantages of this converter are the leakage and magnetizing inductances of the high-frequency transformer are used as part of resonant circuit and the output rectifier voltage is clamped to the output voltage. The converter operates in soft-switching for the inverter switches for the wide variations in supply voltage and load and it requires narrow switching frequency variation (compared to LCC-type) to regulate the output voltage. A three-phase high-frequency transformer isolated interleaved (LC)(L)-type dc-dc series-resonant converter with capacitive output filter using fixed frequency control is proposed. The converter operation for different modes is presented using the operating waveforms and equivalent circuit diagrams during different intervals. This converter is modeled and then analyzed using the approximate complex ac circuit analysis approach. Based on the analysis, design curves were obtained and the design procedure is presented with a design example. The designed converter is simulated using PSIM software to predict the performance of the converter for variations in supply voltage and load conditions. The converter operates in ZVS for the inverter switches with minimum input voltage and loses ZVS for two switches in each bridge for higher input voltages.
Author: Mohamed S. M. Almardy
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
There is an increasing demand for power converters with small size, light weight, high conversion efficiency and higher power density. Also, in many applications, there is a need for dc-to-dc converters to accept dc input voltage and provide regulated and/or isolated dc output voltage at a desired voltage level including telecommunications equipment, process control systems, and in industry applications. This thesis presents the analysis, design, simulation and experimental results of three-phase high-frequency transformer isolated resonant converters. The first converter presented is a three-phase LCC-type dc-dc resonant converter with capacitor output filter including the effect of the magnetizing inductance of the three-phase HF transformer. The equivalent ac load resistance is derived and the converter is analyzed by using approximation analysis approach. Base on this analysis, design curves have been obtained and a design example is given. Intusoft simulation results for the designed converter are given for various input voltage and for different load conditions. The experimental verification of the designed converter performance was established by building a 300 W rated power converter and the experimental results have been given. It is shown that the converter works in zero-voltage switching (ZVS) at various input voltage and different load conditions. A three-phase (LC)(L)-type dc-dc series-resonant converter with capacitive output filter has been proposed. Operation of the converter has been presented using the operating waveforms and equivalent circuit diagrams during different intervals. An approximate analysis approach is used to analyze the converter operation, and design procedure is presented with a design example. Intusoft simulation results for the designed converter are given for input voltage and load variations. Experimental results obtained in a 300 W converter are presented. Major advantages of this converter are the leakage and magnetizing inductances of the high-frequency transformer are used as part of resonant circuit and the output rectifier voltage is clamped to the output voltage. The converter operates in soft-switching for the inverter switches for the wide variations in supply voltage and load and it requires narrow switching frequency variation (compared to LCC-type) to regulate the output voltage. A three-phase high-frequency transformer isolated interleaved (LC)(L)-type dc-dc series-resonant converter with capacitive output filter using fixed frequency control is proposed. The converter operation for different modes is presented using the operating waveforms and equivalent circuit diagrams during different intervals. This converter is modeled and then analyzed using the approximate complex ac circuit analysis approach. Based on the analysis, design curves were obtained and the design procedure is presented with a design example. The designed converter is simulated using PSIM software to predict the performance of the converter for variations in supply voltage and load conditions. The converter operates in ZVS for the inverter switches with minimum input voltage and loses ZVS for two switches in each bridge for higher input voltages.
Author: Dehong Xu
Publisher: John Wiley & Sons
ISBN: 1119602513
Category : Science
Languages : en
Pages : 500
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Book Description
Soft-Switching Technology for Three-phase Power Electronics Converters Discover foundational and advanced topics in soft-switching technology, including ZVS three-phase conversion In Soft-Switching Technology for Three-phase Power Electronics Converters, an expert team of researchers delivers a comprehensive exploration of soft-switching three-phase converters for applications including renewable energy and distribution power systems, AC power sources, UPS, motor drives, battery chargers, and more. The authors begin with an introduction to the fundamentals of the technology, providing the basic knowledge necessary for readers to understand the following articles. The book goes on to discuss three-phase rectifiers and three-phase grid inverters. It offers prototypes and experiments of each type of technology. Finally, the authors describe the impact of silicon carbide devices on soft-switching three-phase converters, studying the improvement in efficiency and power density created via the introduction of silicon carbide devices. Throughout, the authors put a special focus on a family of zero-voltage switching (ZVS) three-phase converters and related pulse width modulation (PWM) schemes. The book also includes: A thorough introduction to soft-switching techniques, including the classification of soft-switching for three phase converter topologies, soft-switching types and a generic soft-switching pulse-width-modulation known as Edge-Aligned PWM A comprehensive exploration of classical soft-switching three-phase converters, including the switching of power semiconductor devices and DC and AC side resonance Practical discussions of ZVS space vector modulation for three-phase converters, including the three-phase converter commutation process In-depth examinations of three-phase rectifiers with compound active clamping circuits Perfect for researchers, scientists, professional engineers, and undergraduate and graduate students studying or working in power electronics, Soft-Switching Technology for Three-phase Power Electronics Converters is also a must-read resource for research and development engineers involved with the design and development of power electronics.
Author: Sriram Jala
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
This thesis deals with hybrid phase modulated converter with inductive output filter as well as capacitive output filter. The operational principles, detailed steady-state analysis for different modes of operation, detailed design procedure with an example. simulation and experimental results are presented for HPMC with inductive output filter. HPMC with inductive output filter has reduced output filter requirements and maintains ZVS for wide line and load variations. This converter suffers from duty cycle loss and output rectifier ringing requiring secondary-side snubbers and higher voltage rated rectifier diodes. To overcome this problem, a hybrid phase modulated DC-DC converter with a capacitive output filter is proposed. Different modes of operation of the proposed converter are identified and a detailed steady-state analysis for these modes of operation is presented. A design example of 200 W, 22 V to 41 V input voltage and 350 V output voltage hybrid phase modulated converter with inductive and capacitive output filter is given to present the design procedure. Simulation and experimental results obtained from the laboratory prototype are provided to verify the performance of the converter. A comparison of performance between the HPMC with inductive and capacitive output filters with standard phase-shifted PWM full bridge converter are also presented.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
This thesis deals with hybrid phase modulated converter with inductive output filter as well as capacitive output filter. The operational principles, detailed steady-state analysis for different modes of operation, detailed design procedure with an example. simulation and experimental results are presented for HPMC with inductive output filter. HPMC with inductive output filter has reduced output filter requirements and maintains ZVS for wide line and load variations. This converter suffers from duty cycle loss and output rectifier ringing requiring secondary-side snubbers and higher voltage rated rectifier diodes. To overcome this problem, a hybrid phase modulated DC-DC converter with a capacitive output filter is proposed. Different modes of operation of the proposed converter are identified and a detailed steady-state analysis for these modes of operation is presented. A design example of 200 W, 22 V to 41 V input voltage and 350 V output voltage hybrid phase modulated converter with inductive and capacitive output filter is given to present the design procedure. Simulation and experimental results obtained from the laboratory prototype are provided to verify the performance of the converter. A comparison of performance between the HPMC with inductive and capacitive output filters with standard phase-shifted PWM full bridge converter are also presented.
Author: Marian K. Kazimierczuk
Publisher: John Wiley & Sons
ISBN: 1118585860
Category : Religion
Languages : en
Pages : 632
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Book Description
This book is devoted to resonant energy conversion in power electronics. It is a practical, systematic guide to the analysis and design of various dc-dc resonant inverters, high-frequency rectifiers, and dc-dc resonant converters that are building blocks of many of today's high-frequency energy processors. Designed to function as both a superior senior-to-graduate level textbook for electrical engineering courses and a valuable professional reference for practicing engineers, it provides students and engineers with a solid grasp of existing high-frequency technology, while acquainting them with a number of easy-to-use tools for the analysis and design of resonant power circuits. Resonant power conversion technology is now a very hot area and in the center of the renewable energy and energy harvesting technologies.
Author: Gerry Moschopoulos
Publisher: John Wiley & Sons
ISBN: 111961242X
Category : Technology & Engineering
Languages : en
Pages : 468
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Book Description
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.
Author: Jürgen Wittmann
Publisher: Springer Nature
ISBN: 3030252574
Category : Technology & Engineering
Languages : en
Pages : 184
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Book Description
This book provides readers with guidelines for designing integrated multi-MHz-switching converters for input voltages/system supplies up to 50V or higher. Coverage includes converter theory, converter architectures, circuit design, efficiency, sizing of passives, technology aspects, etc. The author discusses new circuit designs, new architectures and new switching concepts, including dead-time control and soft-switching techniques that overcome current limitations of these converters. The discussion includes technology related issues and helps readers to choose the right technology for fast-switching converters. This book discusses benefits and drawbacks in terms of integration, size and cost, efficiency and complexity, and enables readers to make trade-offs in design, given different converter parameters. Describes a study for increasing switching frequencies up to 30 MHz at input voltages up to 50V or higher in the scaling of the size of switching converter passives; Analyzes various buck converter implementations and shows that a preference due to higher efficiency depends on the operating point, on the available switch technologies, and on the implementation of the high-side supply generation; Describes an efficiency model based on a four-phase model, which enables separation of loss causes and loss locations.
Author: Zhiqiang Guo
Publisher: Springer Nature
ISBN: 9813299347
Category : Technology & Engineering
Languages : en
Pages : 243
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Book Description
This book presents a series of new topologies and modulation schemes for soft-switching in isolated DC–DC converters. Providing detailed analyses and design procedures for converters used in a broad range of applications, it offers a wealth of engineering insights for researchers and students in the field of power electronics, as well as stimulating new ideas for future research.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
This thesis presents the operational principles, and analysis, simulation. experimental results of a single-cell full-bridge high frequency (HF) transformer isolated DC-to-DC power converter with an inductive output filter controlled with a new gating scheme. A single-stage multi-cell HF transformer isolated AC-to-DC power converter with the same new gating scheme is designed and tested. The new gating scheme is implemented in a Field-programmable gate-array (FPGA) chip to generate the control gating signals for the DC-to-DC and AC-to-DC converters. The steady-state operation of the DC-to-DC converter controlled with the new gating scheme is analyzed using the equivalent circuits during different intervals of operation. Based on the operational analysis, a set of equations is derived to draw design curves. A design example of 5 kW, 580 V to 620 V input and 420 V output DC-to-DC converter is given to present the design procedure. PSPICE simulation and experimental results obtained from an experimental converter controlled with the FPGA are provided to verify the theoretical analysis, and design procedure. A systematical procedure for finding the parameters of the output RCD snubber circuit is also given. A 3 kW 3-cell 166 V to 260 V input 420 V output single-stage HF transformer isolated AC-to-DC multi-cell converter is designed and tested using a FPGA controller The new gating scheme is implemented on a Xilinx Spartan 11 FPGA chip using two digital pulse-width modulation (DPWM) approaches, the conventional DPWM module and the delay-line DPWM module. The simulation and experimental results are presented.
Author: Fei Luo
Publisher:
ISBN:
Category : Electric current converters
Languages : en
Pages : 350
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Book Description
This thesis presents the operational principles, and analysis, simulation. experimental results of a single-cell full-bridge high frequency (HF) transformer isolated DC-to-DC power converter with an inductive output filter controlled with a new gating scheme. A single-stage multi-cell HF transformer isolated AC-to-DC power converter with the same new gating scheme is designed and tested. The new gating scheme is implemented in a Field-programmable gate-array (FPGA) chip to generate the control gating signals for the DC-to-DC and AC-to-DC converters. The steady-state operation of the DC-to-DC converter controlled with the new gating scheme is analyzed using the equivalent circuits during different intervals of operation. Based on the operational analysis, a set of equations is derived to draw design curves. A design example of 5 kW, 580 V to 620 V input and 420 V output DC-to-DC converter is given to present the design procedure. PSPICE simulation and experimental results obtained from an experimental converter controlled with the FPGA are provided to verify the theoretical analysis, and design procedure. A systematical procedure for finding the parameters of the output RCD snubber circuit is also given. A 3 kW 3-cell 166 V to 260 V input 420 V output single-stage HF transformer isolated AC-to-DC multi-cell converter is designed and tested using a FPGA controllerThe new gating scheme is implemented on a Xilinx Spartan 11 FPGA chip using two digital pulse-width modulation (DPWM) approaches, the conventional DPWM module and the delay-line DPWM module. The simulation and experimental results are presented.
