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Dynamic Gyrator-based Transient Analysis of Inductive Power Transfer Systems

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Abstract
This thesis introduces a novel dynamic gyrator model designed for the transient analysis of inductive power transfer (IPT) systems. By applying the dynamic phasor method to magnetically coupled IPT circuits, a dynamic gyrator is derived in the phasor domain. This dynamic gyrator extends the functionality of the conventional static gyrator by incorporating an imaginary gain that is effective not only in steady-state conditions but also during transient operation. One of the significant contributions of this research is the simplification of IPT systems with two LC resonant tanks, traditionally characterized as fourth-order systems, into second-order systems using the proposed model. This reduction drastically eases the complexities associated with analyzing and dynamically controlling IPT systems, particularly those with high-order compensation circuits. The proposed dynamic gyrator model is robust and universally applicable, offering compatibility with various IPT system configurations, regardless of the type of compensation circuits employed. It eliminates the need for complex and cumbersome equations, providing a streamlined approach to the transient analysis and design of IPT systems. Additionally, the model facilitates a deeper understanding of system behavior during transient states, enabling more effective control strategies and optimized designs. The validity and practicality of the dynamic gyrator model are demonstrated through both simulations and experimental verification. A series-series compensated IPT system, 520 W tuned at 50.3 kHz, was analyzed to test the model's performance through simulations an experiments. Results confirm that the proposed model accurately captures the transient and steady-state behaviors of the system while significantly simplifying its analysis and design process. This work represents a major step forward in IPT system research, providing a powerful analytical tool on wireless power transfer technologies.
Author(s)
Hanzalah Mariam Hashmi
Issued Date
2025
Type
Thesis
URI
https://scholar.gist.ac.kr/handle/local/19204
Department
대학원 에너지융합대학원(학과)
Advisor
Rim, Chun T.
Table Of Contents
Abstract I
List of Figures IV
List of Tables V
Chapter 1. Introduction 1
Chapter 2. Theoretical and Mathematical Development 4
2.1 Dynamic Gyrator 4
2.2 Dynamic Phasor-Based Gyrator Model of IPT 6
2.3 Dynamic Phasor Circuit of an IPT Model. 7
2.3.1 Inductor Phasor Transform 7
2.3.2 Capacitor Phasor Transform 7
2.3.3 Resistor Phasor Transform 7
2.4 Dynamic Gyrator-based IPT Analysis 9
Chapter 3. Simulation Verifications 15
3.1 Circuit Parameters 15
3.2 Step Input Response 16
3.3 Transient Output Voltage 17
3.4 Combined Step Input Response and Transient Output Voltage Response 19
3.5 DC Voltage Gain 20
Chapter 4. Experimental Verifications 23
4.1 Preparation of Experimental Kit 23
4.2 Equipment Utilized 25
4.3 Measurement of Transient Output Voltage 26
4.4 Measurement of DC Voltage Gain 27
Chapter 5. Results and Discussions 30
Conclusion 34
Summary 35
Publications 36
References 37
Acknowledgments 40
Degree
Master
Appears in Collections:
Department of Electrical Engineering and Computer Science > 3. Theses(Master)
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