Physics of highly resonant wireless power transfer resonance resonance is a phenomenon that occurs in nature in many different forms. Wireless charging of electric vehicles using strongly. Achieves wireless power transfer to mobile objects with. In 1899, nikola tesla, who had devised a type of resonant transformer called the tesla coil. Mar 22, 2018 the basic working principle of wireless power transfer is, two objects having similar resonant frequency and in magnetic resonance at powerfully coupled rule tends to exchange the energy, while dissipating relatively little energy to the extraneous offresonant objects. Wireless power transfer by high frequency resonating coils. Modeling and analysis of series series and series parallel. Opportunities and challenges for nearfield wireless power transfer. Wireless power transfer via strongly coupled magnetic. Wireless charging of electric vehicles using strongly coupled. Magnetic field in energy transfer region between coils.
Wireless power transfer via strongly coupled magnetic resonances andre kurs, 1 aristeidis karalis,2 robert moffatt, j. Multiband wireless power transfer via resonance magnetic. To model a system composed of ncoils, node equations are built in the form of an nbyn matrix, and the. If a proper resonant waveguide is brought near the transmitter, the evanescent. Several devices can be charged from a single primary coil. Surveys found that there are a lot of methods for wireless energy transfer that exists either by using acoustic, electromagnetic, capacitive or inductive technique. Magnetic resonance method of wireless power transfer technology for industrial equipment achieves wireless power transfer to mobile objects with high efficiency. Modelling and efficiencyanalysis of wireless power. Wireless power transmission using magnetic resonance by. Magnetic resonance and magnetic induction what is the best choice for my application. Pdf modelling and efficiencyanalysis of wireless power. Wireless power transfer an overview sciencedirect topics. The coils can be loosely coupled but demand a high q factor if energy transfer is to be maintained over several centimeters.
Electromagnetic compatibility of resonance coupling wireless power transfer in online electric vehicle system. Circuit analysis of wireless power transfer by coupled. Wireless power transfer wpt has been made feasible in recent years due to advances in technology and better the mpt system works by converting power to microwaves through a microwave generator and then transmitting that power through free space where it is received and converted back to power. The energy can be transferred via magnetic resonant circuit using nonradiative near field. The airfuel standard defines coupled resonant coils for the wireless energy transfer, as illustrated in figure 2. In order to research the relationship between coupling distance and transmission efficiency, study on the transmission characteristics of magnetic resonant coupling for wireless power transmission system, simulation model of wireless power transmission system via magnetic resonance coupling were established based on the theory of two ports network analysis method.
This has two special designed single loop antenna and it can deliver several hundred watts. Wireless power transmission by magnetic resonance circuits. Recently, nonradiative wireless power transfer using magnetic resonance coupling in the near field as a power transfer mechanism has been extensively developed 14. The efficiency of rwpt systems has appeared decreasing rapidly due to increase in distance between transmitters and receivers. The project was researched by former cornell students lucas jorgensen and adam culberson in the year 2008 2. Sony develops highly efficient wireless power transfer. Tentzeris the school of electrical and computer engineering, georgia institute of technology, atlanta, ga, 30332, usa. Oct 28, 2014 in 2006, mit physics professor marin soljacic and his colleagues demonstrated a highly resonant form of magnetic induction that can carry wireless power efficiently over larger distances the breakthrough being commercialized by witricity. In this paper, a higheciency wireless energy transmission via magnetic resonance is implemented by using negative. Georgakopoulos department of electrical engineering, florida international university, miami, fl 33174, usa manos m. We introduce quasistatic cavity resonance qscr, which can enable purposebuilt structures, such as cabinets. Energy will be transfer when both coils will have same resonant frequency 25.
This dissertation, written by olutola jonah, and entitled optimization of wireless power transfer via magnetic resonance in different media, having been approved in respect to style and intellectual content, is referred to you for judgment. Pdf wireless energy transfer system with multiple coils. The leakage inductance in the energy flow path can be reduced by using both magnetic resonant coupling and inductive coupling to enhance the. Lucas jorgensen and adam culberson in conjunction with professor derin sherman introduction we experimented with wireless power transmission. Wpt is useful to power electrical devices where are inconvenient, or not possible, as is the case of body embedded sensors, actuators.
Electromagnetic field as the wireless transporter of energy pdf. Ur rehman and zuhairi baharudin and perumal nallagownden and badar ul islam, year2017. Wireless power transmission using magnetic resonance mandip jung sibakoti and joey hambleton cornell college phy312, december 2011, professor derin sherman 1. Applications that have accelerated the development of wireless energy transfer are, among others, medical implants and mobile devices such as laptops andcellphones. During the course of this research, we investigated the need and usefulness of wireless power transmission and the feasibility of using magnetic inductive. Today, shortdistance wireless energy transfer is either based on capacitive or in. A wireless magnetic resonance energy transfer system for. Wireless energy transfer systems using lasers for consumer space have to satisfy laser safety requirements standardized under iec 60825. Resonant wireless charging relies on a highfrequency oscillating magnetic field transferring energy between two coils operating at the same resonant frequency. Based on the magnetic resonance coupling principle, in this paper a wireless energy transfer system is designed and implemented for the power supply of microimplantable medical sensors. In vitro evaluation of genotoxic effects under magnetic resonant.
To verify the developed model, four types of wireless energy transfer systems are fabricated, measured, and compared with simulation results. The entire system is composed of the in vitro part, including the. Using copper coils, power can be transmitted several feet in all directions efficiently. Wireless power transmission using magnetic resonance. Pdf wireless energy transfer system with multiple coils via. Wireless power transmission via magnetic resonant coupling. Wireless power transfer circuit working, advantages and.
Introduction wireless charging 1, 2, also known as wireless power transfer, is the technology that enables a power source to transmit electromagnetic energy to an electrical load across. In 1899, nikola tesla, who had devised a type of resonant transformer called the tesla coil, achieved a major breakthrough in his work by transmitting 100 million volts of electric power wirelessly over a distance of 26 miles to light up a bank of 200 light bulbs and run one electric motor. Georgakopoulos department of electrical engineering, florida international university, miami, fl 33174, usa abstractthe wireless power transfer wpt efficiency of a mobile wearable medical device mwmd by strongly. Optimization of wireless power transfer via magnetic. In 2006, mit physics professor marin soljacic and his colleagues demonstrated a highly resonant form of magnetic induction that can carry wireless power efficiently over larger distances the breakthrough being commercialized by witricity. Quasistatic cavity resonance for ubiquitous wireless power. Wireless energy transfer using magnetic resonance ieee xplore. Illustration of wireless transfer energy system by using electromagnetic.
Nov 02, 2011 we designed and tested a novel wireless power transfer system. Alliance for wireless power standard describes analogue power transfer for both inductive and resonant, digital transceiver communication and uses a transfer technology using magnetic resonance. Can also be used for rotating parts such as a robot arm. Witricity corporation provides technology to enable wireless power transfer over distance using magnetic resonance. In electricity there are two kinds of resonant coupling. Lee 3 1 department of electrical and electronic engineering, the university of hong kong, hong kong, china. Architects of wireless power transfer systems face a couple of choices in the configurations of coils. Electromagnetic interference shielding effects in wireless. Magnetic resonance has been a cornerstone of nonradiative wireless power transfer wpt since the late 19th century. Wireless power transmission using resonance inductive. The most common form of wireless power transmission is carried out using direct induction followed by resonant magnetic induction. Higher levels of transferred power is possible if larger magnetic. We have read this dissertation and recommend that it be approved.
Resonant wireless power transfer infineon technologies. Inductive versus resonant wireless charging digikey. However, existing solutions are limited to near contact distances and do not provide the geometric freedom to enable automatic and unaided charging. Architects of wireless power transfer systems face a couple of choices in the configurations of coils and the magnetic transfer technique. In this article, we present the analysis of electromagnetic interference emi shielding effects of wireless power transfer wpt using magnetic resonance coupling for boardtoboard level interconnection.
There are several currently used schemes, which rely on nonradiative modes magnetic induction, but they are restricted to very closerange l trans l dev or very. Wireless power transfer is a novel technology and the theory is based on magnetic resonant circuit. Pdf design of wireless power transfer system via magnetic. Wireless energy transfer by coupled magnetic resonances is a popular technology in which energy can be transferred via coupled magnetic resonances in the nonradiative nearfield. If a proper resonant waveguide is brought near the transmitter, the. We designed and tested a novel wireless power transfer system. Pdf efficient wireless electric power transmission using. In particular, energy transfer is often realized by using electromagnetic power. The self resonance coils were designed according to parallel resonant circuit configuration and operated in a strongly coupled regime. Wireless power transfer via inductive resonant coupling. Introduction our project was based upon a mit published paper in the year 2007 titled wireless power transfer via strongly coupled magnetic resonances 1.
Wireless power transfer via inductive resonant coupling youtube. A general equivalent circuit model is developed for a wireless energy transfer system composed of multiple coils via coupled magnetic resonances. The airfuel alliance defined a standard for resonant wpt which operates at a frequency of 6. Increasing efficiency of a wireless energy transfer system by. However, power transfer range can be increased by applying magnetic coupling with resonance phenomenon. Wireless power transfer via strongly coupled magnetic resonances 1. Wireless power transfer to mobile wearable device via resonance magnetic olutola jonah and stavros v. Modelling and efficiencyanalysis of wireless power transfer. Quantum computing explained with a deck of cards dario gil, ibm research duration. Wireless power transfer wpt is the transmission of electrical power without wires and is based on technologies using timevarying electric, magnetic, or electromagnetic fields. Construction of wireless power transfer system using magnetic resonant coupling. The mit team demonstrated the highly resonant technique using a magnetic field to transfer energy over a midrange distance of 2 meters, and an industry was born. Wireless energy transfer using magnetic resonance ieee. Approaches to wireless energy transfer omnidirectional.
In a wireless power transmission system, a transmitter device, driven by. A power transmitter unit that can use more than one power receiver units. It is also known as a resonant wireless power transfer rwpt. Analysis of wireless energy transfer system using magnetic. In, tesla achieved a great progress by designing a resonance. The basic working principle of wireless power transfer is, two objects having similar resonant frequency and in magnetic resonance at powerfully coupled rule tends to exchange the energy, while dissipating relatively little energy to the extraneous offresonant objects. Resonance coupling technique for wireless energy transfer. Wireless energy transfer using magnetic resonance abstract. It is shown that for every system, a resonance frequency can be identified where. For efficient wireless power transfer, tesla showed that using magnetic resonance between a pair of magnetically coupled coilresonators could achieve optimal energy transfer.
The initial idea of wireless power transmission by magnetic resonance method was introduced by. Pdf this chapter provides a general overview of magnetic resonant wireless. Wireless energy transfer by resonant inductive coupling master of science thesis rikard vinge. Witricity type magnetic resonance coupling systems add another set of resonant coils on the primary power source side which pair with the coils on the secondary load bearing side. Multiband wireless power transfer via resonance magnetic olutola jonah and stavros v. This chapter provides a general overview of magnetic resonant wireless power transfer systems based on network models. This article traces some early work of tesla and other researchers related to the use of magnetic resonance in wpt. Effective alternative to squid superconducting quantum interference device. However the energy transferred is limited in a short distance as the rapid decaying of magnetic flux with distance. Em radiation using propagating waves, inductive coupling, and magnetic resonance coupling 1. They use the magnetic resonance coupling scheme to transfer power. Midrange wireless energy transfer using inductive resonance. A large part of the energy sent out by the generating plant must arrive at the receiver or receivers to make the system economical. One of the wpt enabling technologies is the magnetic resonance coupling.
Achieves wireless power transfer to mobile objects with high. Wireless power transfer to mobile wearable device via. This is achieved withoutexceedingtheexposurelimitofmagnetic. Robust wireless power transfer using a nonlinear parity. Resonant inductive coupling is also being used in wireless power systems for portable computers, phones, and vehicles. Efficient wireless electric power transmission using magnetic resonance coupling. The power transferred to a receiver load at resonance is derived and explained.
An overview of resonant circuits for wireless power transfer. Yet, there has been a misconception among some researchers who think magnetic resonance for wpt was developed recently. This article traces some early work of tesla and other researchers related to the use of magnetic resonance. This has two special designed single loop antenna and it can deliver several hundred watts with high transfer efficiency. Boardtoboard wpt consists of source coil, receiver coil, and load which are manufactured on printed circuit board pcb. Since magnetic field coupling is a nonradiative power transfer method, it has higher efficiency. In general, resonance involves energy oscillating between two modes, a familiar example being a mechanical pendulum in which energy oscillates between potential and kinetic forms. This type of wireless power transfer is often tuned to work efficiently at a specific transfer distance and, consequently, is not robust against variations in oper ating. The transfer of power from source to receiver is a technology that has existed for over a century. This discovery has also been the focal point in recent midrange wireless power research. In vitro exposure system using magnetic resonant coupling wireless power transfer volume 1 issue 2 kohei mizuno, junji miyakoshi, naoki shinohara. Pdf wireless power transfer using coupled magnetic resonance.
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