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Final_Thesis_Abhishek.pdf (3.18 MB)
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Analysis and Design of High-Frequency Soft-Switching DC-DC Converter for Wireless Power Charging Applications
Author Info
Danekar, Abhishek V.
Permalink:
http://rave.ohiolink.edu/etdc/view?acc_num=wright1493990400812363
Abstract Details
Year and Degree
2017, Master of Science in Electrical Engineering (MSEE), Wright State University, Electrical Engineering.
Abstract
Wireless power transfer (WPT) technology is becoming attractive in a wide variety of applications such as electric-vehicle charging, induction heating, charging portable applications, industrial robots, and biomedical implants. Recent studies have shown various techniques to implement wireless power transfer and these techniques differ based on the type of applications. For example, for electric vehicle charging, the power levels are in the range 5 kW to 25 kW and the operating frequency is in the range 70 kHz to 110 kHz. On the other hand, for consumer applications, the power levels vary from a few watts to hundreds of watts and operates at frequencies of the order of 5 MHz to 10 MHz. This thesis addresses the analysis, design, implementation, and simulation of a wireless charging system targeted towards a high-frequency, low-power portable application with wide separation between transmitter and receiver. The WPT system is composed of three important blocks: inverter (or transmitter), transformer (or coil), and rectifier (or receiver). Hard-switching inverters and rectifiers have major drawbacks at high frequencies due to large switching power loss. Therefore, soft-switching Class-E topology is chosen. The Class-E dc-ac inverter with CLL resonant tank, also referred to as pi2a impedance matching network is analyzed, designed, and simulated to observe its superior performance over other topologies at varying coupling coefficients and loads. Four soft-switching rectifier topologies are analyzed, designed, and simulated to evaluate their behavior at high frequencies. Their compatibility with Class-E inverters in the presence of loosely-coupled transformers is discussed. The physical and commercial limitations of using transformers with magnetic core is presented. Therefore, the preferred solution, an air-core transformer is designed and integrated with the rectifier to evaluate their characteristics at selected coupling coefficient. The overall system including the inverter, loosely-coupled air-core transformer, and rectifier was designed for the following specifications: operating frequency 6.78 MHz, output power across a single-load 40 W, output voltage 25 V, and target coupling coefficient of 0.5. Simulation results have been provided to validate the theoretical predictions. The major challenges faced during the integration of these building blocks are addressed. Finally, conclusions, contributions, and scope for future work are provided.
Committee
Marian Kazimierczuk, Ph.D. (Advisor)
Saiyu Ren, Ph.D. (Committee Member)
Yan Zhuang, Ph.D. (Committee Member)
Pages
198 p.
Subject Headings
Electrical Engineering
;
Electromagnetics
;
Electromagnetism
;
Engineering
Keywords
Power converters
;
Inverter
;
Rectifier
;
Transformer
;
High frequency wireless power transfer
;
Impedance matching
;
Electrical engineering
;
Soft switching
;
ZVS
;
ZCS
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Refworks
EndNote
RIS
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Citations
Danekar, A. V. (2017).
Analysis and Design of High-Frequency Soft-Switching DC-DC Converter for Wireless Power Charging Applications
[Master's thesis, Wright State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=wright1493990400812363
APA Style (7th edition)
Danekar, Abhishek.
Analysis and Design of High-Frequency Soft-Switching DC-DC Converter for Wireless Power Charging Applications.
2017. Wright State University, Master's thesis.
OhioLINK Electronic Theses and Dissertations Center
, http://rave.ohiolink.edu/etdc/view?acc_num=wright1493990400812363.
MLA Style (8th edition)
Danekar, Abhishek. "Analysis and Design of High-Frequency Soft-Switching DC-DC Converter for Wireless Power Charging Applications." Master's thesis, Wright State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=wright1493990400812363
Chicago Manual of Style (17th edition)
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Document number:
wright1493990400812363
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Copyright Info
© 2017, all rights reserved.
This open access ETD is published by Wright State University and OhioLINK.