Magnetic resonance and magnetic induction what is the best choice for my application. 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. It is shown that for every system, a resonance frequency can be identified where. In electrical engineering terminology, it means energy oscillations between an inductive element energy stored in the magnetic field and a capacitive element energy. Design principles one of the most promising applications of the lefthanded metamate. Higher levels of transferred power is possible if larger magnetic. A lightweight receiver resonator was developed using copper foil.
Wireless energy transfer using magnetic resonance ieee xplore. Wireless power transfer circuit working, advantages and. Pdf design and construction of wireless power transfer system. Air gap and efficiency of magnetic resonant coupling for wireless power transfer using equivalent circuit and neumann formula, ieee transactions on industrial electronics, vol. Electric power was transmitted from the ground to an electrically powered toy helicopter in the air. Lucas jorgensen and adam culberson in conjunction with professor derin sherman introduction we experimented with wireless power transmission. This transformer is called weakly coupled transformer. By applying resonance with in magnetic coupling, the power transfer at a.
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 by resonant inductive coupling master of science thesis rikard vinge. In this chapter, a wireless power transmission system based on magnetic resonance coupling circuit was carried out. Wireless power transfer is a novel technology and the theory is based on magnetic resonant circuit. Wireless power transfer via magnetic resonance coupling. Circuitmodel based analysis of wireless energy transfer. We designed and tested a novel wireless power transfer system. It provides flexibility in case of relative orientation between.
Quantum computing explained with a deck of cards dario gil, ibm research duration. 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. 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 energy transfer by resonant inductive coupling. Wireless energy transfer using magnetic resonance abstract. In the early 1960s resonant inductive wireless energy transfer was used. Today, shortdistance wireless energy transfer is either based on capacitive or in. This has two special designed single loop antenna and it can deliver several hundred watts with high transfer. Wireless power feeding was examined with strongly coupled magnetic resonance for an object moving in 3d space. One of the wpt enabling technologies is the magnetic resonance. Design of wireless power transfer system via magnetic resonant coupling at. A computational study on the magnetic resonance coupling.
Wireless power transfer via strongly coupled magnetic. This article traces some early work of tesla and other researchers related to the use of magnetic resonance. Figure 1 shows a wireless power transfer system with two magneticallycoupled coils. Achieves wireless power transfer to mobile objects with. Wireless power transfer via inductive resonant coupling. Wireless energy transfer using magnetic resonance ieee. Equivalent circuit parameters were calculated with maxwell 3d software, and then, the equivalent circuit was solved using matlab technical computing software. We present a quantitative model describing the power transfer, which matches the experimental results to within 5%. Inductive coupling provides optimum power delivery to a receiver load if both the emitter and the receiver achieve magnetic resonance concurrently. Physics of highly resonant wireless power transfer resonance resonance is a phenomenon that occurs in nature in many different forms. Design of wireless power transfer systems using magnetic resonance coupling for implantable medical devices farid jolani. Neelima, wireless energy transfer using resonant magnetic induction for electric vehicle charging application 2017. Design and simulation of wireless power transfer systems mihai iordache, george andronescu, victor bucata, marialavinia iordache bobaru.
Rezence is a magnetic resonance power transfer standard developed by the alliance for wireless power a4wp. A criterion proposed for inductive coupling and magnetic. Wireless power transfer by using magnetically coupled. Resonant wireless power transfer infineon technologies. Comparing to other conventional contactless energy transfer mechanisms, midrange wireless electricity transmission using magnetic resonant coupling provides some functional benefits. Resonant inductive coupling is also being used in wireless power systems for portable computers, phones, and vehicles. In, tesla achieved a great progress by designing a resonance. Figure 1 a resonant wireless power transfer system consists of a driven lcresonator on the. Wireless power transfer wpt using strongly coupled. We have read this dissertation and recommend that it be approved. Georgakopoulos department of electrical engineering, florida international university, miami, fl 33174, usa manos m. 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. Witricity type magnetic resonance coupling systems add another set of. The initial idea of wireless power transmission by magnetic resonance method was introduced by.
But as the magnetic field decay very quickly, magnetic field is effective only at a very short distance 3. However, these two terms have been ambiguously used without clear definitions. Design of wireless power transfer system via magnetic. Review of magnetic coupling resonance wireless energy.
Hori department of electrical engineering, the university of tokyo, japan department of advance energy, the university of tokyo, japan. This is achieved withoutexceedingtheexposurelimitofmagnetic. There are two methods that are widely used in wireless power transfer system. Wireless power feeding with strongly coupled magnetic. Using copper coils, power can be transmitted several feet in all directions efficiently. The energy can be transferred via magnetic resonant circuit using nonradiative near field. Wireless power transmission using magnetic resonance mandip jung sibakoti and joey hambleton cornell college phy312, december 2011, professor derin sherman 1. Magnetic resonance coupling with centimeterscale size of coils has been designed in order to promote the application of magnetic resonance energy coupling in imds. These coils can be used to provide energy for wireless sensors and batteryoperated devices. Energy transfer systems mostly use antennas operating in. For magnetically coupled circuits, resonance refers to the energy oscillations between the magnetic field and the electric field. Lc wpt defined as resonant wireless transfer of through magnetic induction betweencoils where the coupling factor k can be less than 0. Architects of wireless power transfer systems face a couple of choices in the configurations of coils and the magnetic transfer technique.
Yet, there has been a misconception among some researchers who think magnetic resonance for wpt was developed recently. Tentzeris the school of electrical and computer engineering, georgia institute of technology, atlanta, ga, 30332, usa. Mathematical expressions of optimal coupling coefficients were examined with the coupling model. Wireless power transfer is a generic term for a number of different technologies for transmitting energy by means of electromagnetic fields. Resonant inductive coupling or magnetic phase synchronous coupling is a phenomenon with. Illustration of wireless transfer energy system by using electromagnetic.
Using selfresonant coils in a strongly coupled regime, we experimentally demonstrated efficient nonradiative power transfer over distances up to 8 times the radius of the coils. The latest versions of adobe reader do not support viewing pdf files within firefox on mac. Magnetic resonance has been a cornerstone of nonradiative wireless power transfer wpt since the late 19th century. Devices designed for power transfer at distance magnetic resonance power devices that rely on. In such a transformer, a small quantity of the magnetic flux pro. Wireless power transmission via magnetic resonant coupling. Characteristics of magnetically coupled resonance based wireless energy transfer proposed by the mit the key of the wireless energy transmission technology which mit called witricity is the use of nonradiation magnetic coupling that can produce a very strong mutual coupling between two coils with the same resonant frequency. In this work, we propose a wireless communication and wireless power transceiver system based on magnetic resonant coupling. Multiband wireless power transfer via resonance magnetic.
If a proper resonant waveguide is brought near the transmitter, the. In electricity there are two kinds of resonant coupling. Technology requirements for high power applications of wireless power transfer. The self resonance coils were designed according to parallel resonant circuit configuration and operated in a strongly coupled regime. Wireless power transmission using magnetic resonance by. Optimization of wireless power transfer via magnetic. Wireless energy transfer, resonant inductive coupling, induction, resonantcircuits,ferrite. Resonance coupling technique for wireless energy transfer. Analysis of wireless energy transfer system using magnetic.
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. Sungyong jung department of electrical engineering, the university of texas at arlington, arlington, texas 76019 research experiences for undergraduates in sensors and applications in this project, an analog circuit is being designed in order to transmit power to. This chapter provides a general overview of magnetic resonant wireless power transfer systems based on network models. Both the electromagnetic induction method and the magnetic resonance method are wireless power transfer systems which use magnetic coupling, and transfer power by using a high frequency power supply to pass the change in the high frequency magnetic field from the power transmission coil to the power reception coil. Wireless electromagnetic energy tran sfer used for low power battery charging. 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. Energy will be transfer when both coils will have same resonant frequency 25. 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.
The research work for this thesis is based on utilizing resonant magnetic induction for wirelessly charging electric vehicles. Design and simulation of wireless power transfer systems. The inductive components can be considered as an ac transformer with inductive high transmission. Multireceiver and repeater wireless power transfer via magnetic resonance coupling impedance matching and power division utilizing impedance inverter k. Oneside impedance matching the transmitter side was proposed to cope with. The power transferred to a receiver load at resonance is derived and explained. Wireless power transmission by magnetic resonance circuits. Witricity corporation provides technology to enable wireless power transfer over distance using magnetic resonance. The coupled coils can have different shapes and sizes.
Wireless power transfer wireless power transfer for consumer devices tcb workshop april 20. In the transmitter coil, the electric energy is converted to magnetic energy which is picked up in the receiver coil where it is converted back to electrical energy. Multiband wireless power transfer via resonance magnetic olutola jonah and stavros v. Wireless power transmission using magnetic resonance.
Pdf wireless power transfer using coupled magnetic resonance. Surveys found that there are a lot of methods for wireless energy transfer that exists either by using acoustic, electromagnetic, capacitive or inductive technique. 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. The transfer is made through inductive coupling and electromagnetic radiation. 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. Pdf design of wireless power transfer system via magnetic. The same frequency band and loop antenna is shared for power transmission and data communication. Pdf the goal of the project was to develop a wireless power transfer wpt system and implement it in innovative flooring. Magnetic resonant coupling based wireless power transfer.
Sony develops highly efficient wireless power transfer. A wireless magnetic resonance energy transfer system for. The technologies, listed in the table below, differ in the distance over which they can transfer power efficiently, whether the transmitter must be aimed directed at the receiver, and in the type of electromagnetic energy they use. Multireceiver and repeater wireless power transfer via. A single transmitter can pow er up to eight receiver devices.
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