Modelling Wireless Power Transfer Using an Array of Tesla Coils PDF Download
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Author: Casey Thomas Pierson
Publisher:
ISBN:
Category : Electric power transmission
Languages : en
Pages : 116
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Book Description
Wireless power transmission, or WPT, is a well-demonstrated property in electrical science and physics. Coil-and-wave transmission (CWT) consists of two Tesla coils, one powered by a controlled voltage source v src and one connected across a generic load Z 0 , at a mid- to long range distance apart with spherical capacitors at each of their top loads. The literature on the different methods of WPT varies widely, but research of CWT is sparse, lacking especially in the area of computer simulation. Recently, a physical experiment was conducted by Marzolf et al. in [1], and yielded surprising resonant frequencies in the high frequency range. The goal of this research is to answer the question of whether these reosnant frequencies originate in unexplained field effects or in non-ideal circuit behavior, and establish a formal model to indicate at what frequencies the resonant peaks occur as a first approximation. By carefully constructing a simulation of the most geometrically simple, power efficient design in the work of Marzolf et al. using the scientific software Octave, we investigate these frequencies computationally: first, an ideal scenario that has no flux leakage or exterior losses is modelled mathematically and simulated, and then, a non-ideal scenario that accounts for losses in the coils and surroundings is modelled mathematically and simulated. Both models utilize a simple formula for spherical capacitance for the top loads. After running these simulations through detailed sampling up to 4 MHz, the ideal model could not account for the resonant peaks, while the non-ideal model indicated the resonant peaks near the exact frequency ranges that were observed. An unexpected characteristic of these results was that coupling coefficients between the coils of the transmitter and receiver played a noticeable part in the indication of resonant peaks. This demonstrates that unknown field effects are not the primary driver of resonance in the ideal or non-ideal construction, and raises inriguing questions about the circuit design’s relationship with resonance in the locality about the coils.
Author: Casey Thomas Pierson
Publisher:
ISBN:
Category : Electric power transmission
Languages : en
Pages : 116
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Book Description
Wireless power transmission, or WPT, is a well-demonstrated property in electrical science and physics. Coil-and-wave transmission (CWT) consists of two Tesla coils, one powered by a controlled voltage source v src and one connected across a generic load Z 0 , at a mid- to long range distance apart with spherical capacitors at each of their top loads. The literature on the different methods of WPT varies widely, but research of CWT is sparse, lacking especially in the area of computer simulation. Recently, a physical experiment was conducted by Marzolf et al. in [1], and yielded surprising resonant frequencies in the high frequency range. The goal of this research is to answer the question of whether these reosnant frequencies originate in unexplained field effects or in non-ideal circuit behavior, and establish a formal model to indicate at what frequencies the resonant peaks occur as a first approximation. By carefully constructing a simulation of the most geometrically simple, power efficient design in the work of Marzolf et al. using the scientific software Octave, we investigate these frequencies computationally: first, an ideal scenario that has no flux leakage or exterior losses is modelled mathematically and simulated, and then, a non-ideal scenario that accounts for losses in the coils and surroundings is modelled mathematically and simulated. Both models utilize a simple formula for spherical capacitance for the top loads. After running these simulations through detailed sampling up to 4 MHz, the ideal model could not account for the resonant peaks, while the non-ideal model indicated the resonant peaks near the exact frequency ranges that were observed. An unexpected characteristic of these results was that coupling coefficients between the coils of the transmitter and receiver played a noticeable part in the indication of resonant peaks. This demonstrates that unknown field effects are not the primary driver of resonance in the ideal or non-ideal construction, and raises inriguing questions about the circuit design’s relationship with resonance in the locality about the coils.
Author: Ben Minnaert
Publisher: MDPI
ISBN: 3036505083
Category : Mathematics
Languages : en
Pages : 148
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Book Description
Wireless power transfer allows the transfer of energy from a transmitter to a receiver across an air gap, without any electrical connections. Technically, any device that needs power can become an application for wireless power transmission. The current list of applications is therefore very diverse, from low-power portable electronics and household devices to high-power industrial automation and electric vehicles. With the rise of IoT sensor networks and Industry 4.0, the presence of wireless energy transfer will only increase. In order to improve the current state of the art, models are being developed and tested experimentally. Such models allow simulating, quantifying, predicting, or visualizing certain aspects of the power transfer from transmitter(s) to receiver(s). Moreover, they often result in a better understanding of the fundamentals of the wireless link. This book presents a wonderful collection of peer-reviewed papers that focus on the modelling of wireless power transmission. It covers both inductive and capacitive wireless coupling and includes work on multiple transmitters and/or receivers.
Author: Ashish Thakur
Publisher: Independently Published
ISBN: 9781726820981
Category : Education
Languages : en
Pages : 32
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Book Description
The technology for wireless power transfer (WPT) is in the forefront of electronic development. Applications involving microwaves, solar cells, lasers, and resonance of electromagnetic waves have had the most recent success with WPT. The main function of wireless power transfer is to allow electrical devices to be continuously charged and lose the constraint of a power cord. Although the idea is only a theory and not widely implemented yet, extensive research dating back to the 1850
Author: Joshua Nathan Turnbull
Publisher:
ISBN:
Category : Electric coils
Languages : en
Pages : 0
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Book Description
In current commercial technologies, wireless power transfer (WPT) occurs when the item charging and the charger are not in motion. Products such as wireless chargers for cell phones, cars, and some internet of things (IoT) devices have stationary wireless chargers. A limiting factor of these chargers is in a single transfer coil system, the coils need to be aligned perfectly, and the device must be physically touching the charger. If it is not, minimal or no power is transferred, and the device is not charged. This set-up allows manufacturers to simplify design and modeling as a steady-state system. In this thesis, the receiving coil is in motion over the embedded transfer coil. The industrial standard to discern how the system would react uses finite element analysis (FEM), which is very resource-intensive and time-consuming. The point of this thesis is to model and approximate the potential of a WPT system to help discern the viability of designs, therein reducing the number of resources and time necessary to find an optimum solution. A Series-Series Compensated Wireless Power Transfer circuit was solved using Thevenin Equivalent Circuits and converted into a state-space equation. Using MATLAB® and Simulink, the circuit was modeled and compared to another study to validate the results. Variables such as frequency, load resistance, vertical and horizontal offset were then changed to see how the output voltage waveform and power transfer changed. Due to the receiving coil's motion, a steady-state is not reached, and the system has transient states. The effects on the waveforms, thoughts about optimization, and possible future studies are discussed.
Author: Pablo Pérez-Nicoli
Publisher: Springer Nature
ISBN: 303065477X
Category : Technology & Engineering
Languages : en
Pages : 230
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Book Description
This book presents a system-level analysis of inductive wireless power transfer (WPT) links. The basic requirements, design parameters, and utility of key building blocks used in inductive WPT links are presented, followed by detailed theoretical analysis, design, and optimization procedure, while considering practical aspects for various application domains. Readers are provided with fundamental, yet easy to follow guidelines to help them design high-efficiency inductive links, based on a set of application-specific target specifications. The authors discuss a wide variety of recently proposed approaches to achieve the maximum efficiency point, such as the use of additional resonant coils, matching networks, modulation of the load quality factor (Q-modulation), and adjustable DC-DC converters. Additionally, the attainability of the maximum efficiency point together with output voltage regulation is addressed in a closed-loop power control mechanism. Numerous examples, including MATLAB/Octave calculation scripts and LTspice simulation files, are presented throughout the book. This enables readers to check their own results and test variations, facilitating a thorough understanding of the concepts discussed. The book concludes with real examples demonstrating the practical application of topics discussed. Covers both introductory and advanced levels of theory and practice, providing readers with required knowledge and tools to carry on from simple to advanced wireless power transfer concepts and system designs; Provides theoretical foundation throughout the book to address different design aspects; Presents numerous examples throughout the book to complement the analysis and designs; Includes supplementary material (numerical and circuit simulation files) that provide a "hands-on" experience for the reader; Uses real examples to demonstrate the practical application of topics discussed.
Author: Cheng Zhang
Publisher: Open Dissertation Press
ISBN: 9781361042915
Category : Technology & Engineering
Languages : en
Pages : 184
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Book Description
This dissertation, "Directional and Omnidirectional Inductively Coupled Wireless Power Transfer Systems" by Cheng, Zhang, 張騁, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract: This thesis presents the analysis and design methods of directional and omnidirectional inductively coupled wireless power transfer systems. Such system utilizes multiple coils to generate high frequency alternating magnetic fields in space and allows receivers to pick up power wirelessly in any position. The objective of optimization is to achieve the maximum power efficiency. Such kind of system allows the mobile devices to be continuously charged without staying on a fixed place. Self- and mutual- inductance values of the coils are critical parameters that affect the power efficiency of a wireless power transfer system. An improved numerical calculation method is proposed and is presented in this thesis. It combines the theory of partial equivalent element circuit (PEEC) and empirical equations for calculating certain types of straight conductors. The segmentation method to discretize the conductor is optimized and verified. The accuracy of the proposed method has been tested and compared to both theoretical equations and measurements of practical coils, and is proved to be accurate. The time-varying magnetic fields induced by the coils in a wireless power transfer system is the \transporter" of the energy. A time-efficient visualization method is proposed and is presented in this thesis. While commercial finite element analysis (FEA) software such as ANSYS Maxwell can perform transient analysis, the execution time is extremely long as the accuracy greatly depends on the simulation time steps and the number of iterations. The proposed method calculates the time-instant currents in coils with the derived mathematic model and then directly plots the time-varying magnetic fields. The execution time is shortened to a few of minutes on a desktop computer while the FEA solver takes a couple of hours on the same model. Several types of multiple-coil systems are analyzed with their magnetic field patterns. To transmit power to arbitrary directions, the magnetic field must be controlled with its directions. According to the principle of superposition, a three-orthogonal-coil transmitter structure is proposed. Several current control methods are discussed to achieve omnidirectional wireless power characteristics. One is a continuous scanning type current scheme. The receivers placed in the designated area can receive power with any locations and angles. Another one is a discrete scanning type. It can be used to detect the load position and therefore delivering power to the load with the maximum power efficiency of the overall system. Simulations and experiments have been carried out to verify the theory and they agreed well. While the aforesaid omnidirectional system adopts the special three-orthogonal-coil structure, the theory is generalized to arbitrary numbers of transmitters. It is proved by mathematical derivation that in a system with multiple transmitters and single receiver, there exists an optimal efficiency point when currents in the transmitter coils fulfill the certain relationships, regardless of the compensation scheme of the circuit, the use of magnetic materials and the shapes of the coils. An implementable method to calculate the optimal currents in a practical multiple-transmitter-single-receiver system is also provided. The generalized theory is verified by both simulations and experiments. Subjects: Electric power transmission
Author: Martin Poole
Publisher: Independently Published
ISBN: 9781694353818
Category :
Languages : en
Pages : 136
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Book Description
Over one hundred-twenty years ago Nikola Tesla had a dream. His plan was to use renewable energy resources from hydroelectric plants and transport the power to farms, ships, trains, airplanes, and cities without the use of Power Towers and wires. Tesla was unable to complete his plans because of financial problems.He never divulged the intimate details of his wireless plans or how his power transfer used the earth as a transport wire. We have been trying to figure it out ever since his death without much luck, I might add: that is until now. Engineers at Wireless Power Technologies, USA have successfully duplicated Tesla's wireless transport.We have learned through research how the power is moved from point to point. We know the frequencies to use and the power required for each. Aerial devices, defined as any receiver without a ground, can be powered with the same earth currents as grounded receivers. It is all in the book.During our experiments with wireless power transfer we inadvertently learned about underwater power transfer and broadband. The wireless signal travels through water (salt and fresh) at light-speed. We shared the information with a university in Boston. We built prototype transceivers and sent them for testing. Underwater power transfer will provide not only power but broadband Internet to subsea drones and habitats. The range is hundreds to thousands of miles depending on signal strength. Tesla's Secrets Revealed is compiled from lab notes and actual test results. The reader will learn how power transfer through the earth works. In the book, new terminology is used to provide the language required for a scientific dialog. Tesla's Secrets Revealed opens the gates to this one-hundred-year-old wireless technology. There is very little information held back from the reader, if any. Various transmit and receive apparatuses are introduced in a basic form to help form a clear picture of the wireless methods. This book is clearly written for the engineer and the layman. I know it will be a surprize revelation of the simplicity of Tesla's wireless power transfer. Martin Poole Sr. Scientist
Author: Tom Valone Ph.D.
Publisher: SCB Distributors
ISBN: 1939149673
Category : Science
Languages : en
Pages : 464
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Book Description
The immense genius of Tesla resulted from a mind that could see an invention in 3-D, from every angle, within his mind before it was easily built. Tesla’s inventions were complete down to dimensions and part sizes in his visionary process. Tesla would envision his electromagnetic devices as he stared into the sky, or into a corner of his laboratory. His inventions on rotating magnetic fields creating AC current as we know it today, have changed the world—yet most people have never heard of this great inventor Is he a suppressed inventor, as many historians contend? Many of Tesla’s concepts and inventions are still thought of as science fiction today—over 60 years later! Includes: Tesla’s fantastic vision of the future, his wireless transmission of power, Tesla’s Magnifying Transmitter, the testing and building of his towers for wireless power, tons more. The genius of Nikola Tesla is being realized by millions all over the world!
Author: Tianjia Sun
Publisher: Springer Science & Business Media
ISBN: 1461477026
Category : Technology & Engineering
Languages : en
Pages : 190
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Book Description
This book provides an in-depth introduction to the newest technologies for designing wireless power transfer systems for medical applications. The authors present a systematic classification of the various types of wireless power transfer, with a focus on inductive power coupling. Readers will learn to overcome many challenges faced in the design a wirelessly powered implant, such as power transfer efficiency, power stability, and the size of power antennas and circuits. This book focuses exclusively on medical applications of the technology and a batteryless capsule endoscopy system and other, real wirelessly powered systems are used as examples of the techniques described.
Author: Alicia Triviño-Cabrera
Publisher: Springer Nature
ISBN: 3030267067
Category : Technology & Engineering
Languages : en
Pages : 162
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Book Description
This book describes the fundamentals and applications of wireless power transfer (WPT) in electric vehicles (EVs). Wireless power transfer (WPT) is a technology that allows devices to be powered without having to be connected to the electrical grid by a cable. Electric vehicles can greatly benefit from WPT, as it does away with the need for users to manually recharge the vehicles’ batteries, leading to safer charging operations. Some wireless chargers are available already, and research is underway to develop even more efficient and practical chargers for EVs. This book brings readers up to date on the state-of-the-art worldwide. In particular, it provides: • The fundamental principles of WPT for the wireless charging of electric vehicles (car, bicycles and drones), including compensation topologies, bi-directionality and coil topologies. • Information on international standards for EV wireless charging. • Design procedures for EV wireless chargers, including software files to help readers test their own designs. • Guidelines on the components and materials for EV wireless chargers. • Review and analysis of the main control algorithms applied to EV wireless chargers. • Review and analysis of commercial EV wireless charger products coming to the market and the main research projects on this topic being carried out worldwide. The book provides essential practical guidance on how to design wireless chargers for electric vehicles, and supplies MATLAB files that demonstrate the complexities of WPT technology, and which can help readers design their own chargers.
