wireless power transfer
CALIFORNIA STATE UNIVERSITY, NORTHRIDGE
WiTricity: Wireless Power Transfer
A Graduate Project submitted in fulfillment of the requirements
For the Degree of Master of Science in
Electrical Engineering
By
Pranit Yeole
MAY 2013
The Graduate Project of Pranit Yeole is approved:
_________________________________________________
Dr. Ali Amini
____________
Date
_________________________________________________
Dr. Ahmad Bekir
______________
Date
_________________________________________________
Dr. Ignacio Osorno, Chair
____________
Date
California State University, Northridge
II
ACKNOWLEDGEMENT
It gives me immense pleasure and satisfaction in presenting the project report on
“WiTricity: Wireless Power Transfer” towards the partial fulfillment of Master of
Science degree in Electrical Engineering.
I wish to express my sincere gratitude to Dr. Bruno for his kind guidance, valuable suggestions and timely advices. I would also like to thank each and every person who helped me in completion of this project directly or indirectly.
I would like to thank my parents and friends for their constant encouragement and help. Pranit Yeole
III
TABLE OF CONTENTS
Signature Page
Acknowledgement
List of figures
Abstract
1. Introduction
2. Theory
2.1. Resonance
2.2. Resonators
2.3. Resonant Energy Transfer
2.4. Resonant Coupling
2.5. Energy Transfer and Efficiency
2.6. Coupled Mode Theory
2.6.1. Simulation Results in Different Coupled Modes
2.6.1.1. Energy Transfer With k/T >>1
2.6.1.2. Energy Transfer Without k/T >>1
2.6.1.3. Influence of k/T on the Total Energy of the System
2.6.2. Dielectric Disks
2.6.3. Capacitively-loaded conducting wire loops
3. WiTricity
3.1. What WiTricity is not?
3.1.1. Traditional Magnetic Induction
3.1.2. Radioactive Power Transfer
3.1.3. MRI
3.2. What WiTricity is?
3.3. Why WiTricity?
3.4. Range
3.5. Evanescent Waves
3.6. How it works
4. Prototype Circuit
4.1.
WiTricity: Wireless Power Transfer
A Graduate Project submitted in fulfillment of the requirements
For the Degree of Master of Science in
Electrical Engineering
By
Pranit Yeole
MAY 2013
The Graduate Project of Pranit Yeole is approved:
_________________________________________________
Dr. Ali Amini
____________
Date
_________________________________________________
Dr. Ahmad Bekir
______________
Date
_________________________________________________
Dr. Ignacio Osorno, Chair
____________
Date
California State University, Northridge
II
ACKNOWLEDGEMENT
It gives me immense pleasure and satisfaction in presenting the project report on
“WiTricity: Wireless Power Transfer” towards the partial fulfillment of Master of
Science degree in Electrical Engineering.
I wish to express my sincere gratitude to Dr. Bruno for his kind guidance, valuable suggestions and timely advices. I would also like to thank each and every person who helped me in completion of this project directly or indirectly.
I would like to thank my parents and friends for their constant encouragement and help. Pranit Yeole
III
TABLE OF CONTENTS
Signature Page
Acknowledgement
List of figures
Abstract
1. Introduction
2. Theory
2.1. Resonance
2.2. Resonators
2.3. Resonant Energy Transfer
2.4. Resonant Coupling
2.5. Energy Transfer and Efficiency
2.6. Coupled Mode Theory
2.6.1. Simulation Results in Different Coupled Modes
2.6.1.1. Energy Transfer With k/T >>1
2.6.1.2. Energy Transfer Without k/T >>1
2.6.1.3. Influence of k/T on the Total Energy of the System
2.6.2. Dielectric Disks
2.6.3. Capacitively-loaded conducting wire loops
3. WiTricity
3.1. What WiTricity is not?
3.1.1. Traditional Magnetic Induction
3.1.2. Radioactive Power Transfer
3.1.3. MRI
3.2. What WiTricity is?
3.3. Why WiTricity?
3.4. Range
3.5. Evanescent Waves
3.6. How it works
4. Prototype Circuit
4.1.
References: Devices”, 31st Annual International Conference of the IEEE EMBS, Minneapolis, Minnesota, USA, September 2-6, 2009. Annual International Conference of the IEEE EMBS, Buenos Aires, Argentina, August 31-September 4, 2010. Science, vol. 317 no. 5834, pp. 83-86, July 2007. Electromagnetics Research, vol. 106, 33-47, 2010 [12] Wireless Power May Cut the Cord for Plug-In Devices, Including Cars Circuits and Systems (ISCAS), 2011 IEEE International Symposium on, pp. 498-501, May 15-18, 2011.