I have been all over the net looking for the most basic circuit diagram or instructions to put together a small project on wireless energy transfer. Wireless power transmission an overview of technological advancements bablu kumar singh1. Witricity has taken a decade of building the best wireless power system architecture and consolidated it into a chip delivering higher power. Circuit design electronics witricity models ac ac design steps 1. A free online environment where users can create, edit, and share electrical schematics, or convert between popular file formats. Witricity do es not follow any path of resistive wire hence neither energy absorbed nor dissipated hence there is neglig i ble wasta ge so it has h ighly efficie nt. Electrical circuits on different pieces of equipment will have similarities. You may have even had to follow one particular cord through the seemingly impossible snarl to the outlet, hoping that the plug you pull will be the right one. Most circuits will have resistors, capacitors, relays, contactors, switches, and transformers. A witricitybased highpower device for wireless charging of electric vehicles zhongyu dai, junhua wang, mengjiao long and hong huang. Operation and design 4 application note an 201209 v1.
A witricitybased highpower device for wireless charging. Such circuits are known as discrete circuits because each component added to the. Witricity research from mit wirelessly powered 60 watts bulb using magnetic reso. Performancewise, the goal is to transfer a few kw of. International journal of engineering research and general sciencevolume 2, issue 5, august september 2014 issn 20912730 26. One coil source coil is coupled inductively to an oscillating circuit. Our experimental scheme consists of two selfresonant coils.
In this lesson, well explore the parts of a circuit. A simple electrical circuit all electric circuits consist of three essen5al components. The circuit feeds a parallel lc tank circuit which would take feedback from the tank circuit itself, hence always. Electrical circuit calculations series circuits many circuits have more than one conversion device in them i. The technology used for wireless power transmission is known as witricity. According to the specific requirements of threestage charging for electric vehicles, four compensation modes of the witricity system are analyzed by the loosely coupled theory among transformer coils and the substitution theorem in circuit theory.
The network structure includes the wireless network interface adapters and base stations that send and receive the radio signals. Witricity for mobile charging application international journal of. Holes go all the way through the board from one side to the other. So if you can supply various input frequencies and observe the output, and if your circuit is correct, you will see that the magnitude of the output is much smaller than the input, except when near the resonant frequency. Brings you all the tools to tackle projects big and small combining realworld components with online collaboration. Witricity delivers wireless power at a distance to any device enabling new experiences with products that transform the way we live, work and move. Schematic arrangement of the circuit is shown in figure 2. Witricity wireless charger the wit2000m solution enables developers of mobile devices to shorten the design cycle for integrating highlyresonant wireless power transfer into ultrathin smartphones, tablets, and comparable devices. A simple dc battery connected by copper wire to a resistor is. The project wireless mobile charger circuit diagram posted here can deliver 271ma at 5. Finally, a witricity based highpower device was proposed.
This technology is attracting a wide range of applications, from lowpower. Witricity free download as powerpoint presentation. Edn witricity emerges with innovative wireless power at. This concept is called witricity which seems to have a bright future in providing wireless electricity. A witricity based highpower device for wireless charging of electric vehicles zhongyu dai, junhua wang, mengjiao long and hong huang. Fig 1 nikola tesla was the first to experiment with wireless electricity, but ultimately. Midrange wireless power transfer and its application to. Briefly, as shown in figure 1a, the basic relay witricity system consists of three resonators. Resonant inductive coupling is also being used in wireless power systems for. Printed circuit board components are attached to a printed circuit board. How would be the future with witricity modern science has now made it possible to use electricity without having to plug in any wires. The receiver works on the same principle as radio receivers where the device has to be in the range of the transmitter. The diagram shows the basic components of the system with the switching amplifier 804 comprising a power source 810, switching elements 808, and capacitors. Witricity is building mixedsignal chips to simplify system design, improve performance, reduce components, save cost and speed up product design and validation, so companies can go to market faster.
Witricity resonance inductor free 30day trial scribd. Selfresonant coils rely on the interplay between distributed inductance and distributed capacitance to achieve resonance. Pdf in this work wireless power transfer wpt system using inductive coupling technique. Youll learn how you can make changes in the parts of a circuit, called components, and the effect those changes will have on the circuit. If anyone knows of a good schematic that is super simple and geared towards noobs could you please share, or leave instructions. About the tutorial power electronics refers to an interdisciplinary subject within electrical engineering that deals with the design, control and conversion of power in its electric form. Remember a resonant circuit also behaves as a filter, passing your desired frequency and rejecting others.
This circuit acts as both, step up voltage converter and also wireless electricity transmitter and receiver. Witricity is a recent technology for wireless power transfer over a limited distance. Finally, a witricitybased highpower device was proposed. Ac drive components open in overleaf circuit example open in overleaf colpitts oscillator, with npn transistor open in overleaf dynamic inversegammaequivalent circuit for an induction machine open in overleaf insulated gate bipolar transistor equivalent circuit open in overleaf. I need the most basic circuit diagram for wireless energy. The parts that are used to create electronics devices and circuits. Common components used in electronics are the resistor, capacitor, inductor, diode, transistor, and the integrated circuit. Wireless energy transfer by resonant inductive coupling. In this paper, a witricitybased highpower device is proposed for wireless charging of electric vehicles.
A wireless energy solution available at anytime and anywhere. Electromechanical devices like switches, relays, connectors, and. Wireless charging technology has been around for more than 100 years, but its inclusion in devices such as apples new iphone line has given it new life. Safe, efficient, and over distance background the idea of transmitting power through the air has been around for over a century, with nikola teslas pioneering ideas and experiments perhaps being the most wellknown early attempts to do so 1. This paper reports the study on a topical mode of energy transmission using resonant technique, commonly known as witricity short form of wireless electricity 4. In terms of the osi reference model, the radio signal operates at the physical layer, and the data format controls several of the higher layers. Witricity the wireless power transmission technology. Resistors in circuits summary the physics hypertextbook. Sony demonstrated powering wirelessly sixty volts to an electrodynamicinduction tv set, over a distance of half a meter.
International journal of engineering research and general. Pendulum, quartz crystal, lc circuit coupled resonators. Witricity claims 10 to 20 cm distance although custom configurations can be provided for vehicles having higher or lower clearances with 90% efficiency at a 3. A conduc6ng path, which allows electrons electric charge to. In this idea for design, placing this circuit setup between the battery vdd bus and the pic microcontroller allows you to. A booster circuit is a dcdc power converter with an output voltage greater than its input voltage. Wireless electricity transfer witricity help page 2. Companies like energous and ossia are developing true wireless charging that works over the air so you can power up at a distance. This is a simple circuit that can power a light bulb. Stores energy energy oscillates between two modes spatial, temporal, form, etc. While it can make peoples lives easier, it can add a lot of.
The circuit of choice was a slightly modified form of royer oscillator, such as popularly used in ccfl inverters and flyback drivers. Coupling mediates energy exchange between resonators efficient. Its just an electronic circuit that has been shrunk to fit inside a chip. Wireless inductive charging for low power devices theseus.
A system that converts electric energy to an electric load through a control circuit is known as a power electronic system. These generally comprise components capacitors and inductors that are arranged in t andor pi configurations. Making wireless electricity a reality, faster andre kurs founder witricity corporation andre. Their vision of the future soon morphed into claims of wirelessly powering entire homes, including appliances, home computers, heating, lighting etc. It could be an amplifier, it could be a microprocessor, it could be a usb to serial converter it could be anything. Understanding the function of each of these components will help you better understand how to troubleshoot a circuit. It is with the help of resonant magnetic fields that witricity produces electricity, while reducing the wastage of power. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. If the circuit components are connected end to end to form a single loop it is a series circuit. Witricity research from mit wirelessly powered 60 watts bulb using magnetic resonance with forty percent power efficiency at a distance of 200 cm. In highlyresonant wireless power transfer systems, the system resonators must be highq in order to efficiently transfer energy.
Wireless mobile charging is one of the trending topic in the field of electronics thus we also decided to build a wireless mobile charger circuit diagram using various commonly available components. A circuit is a closed system which contains an electrical energy source connected to a load via electrical conductors typically metal that does some kind of work. A resonant transformer of this type is often used in analog circuitry as a bandpass filter. Resonant inductive coupling or magnetic phase synchronous coupling is a phenomenon with inductive coupling where the coupling becomes stronger when the secondary loadbearing side of the loosely coupled coil resonates.
Less costly components of transmitter and receivers are cheaper. Bachelor of science in electrical and electronic engineering. It is of a switchedmode power supply smps containing one semiconductor a transistor, at least one energy storage element, a capacitor, an inductor, or the two in combination samer, 2014. Introduction to wireless networks when you invent a new network. A systematic overview about the operational mechanisms of the witricity can be found in. Figure 2 shows a schematic representation of an inductive coupling approach to impedance matching. Integrated circuits 627 introduction t he circuits discussed so far in the text consisted of separately manufactured components e. The wit2000m is an optimized design covered by witricitys patented. Wireless charging of electric vehicles using strongly. Wireless mobile charger circuit diagram engineering projects. 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 an air gap, without interconnecting cords. When it was founded in 2007, it was attempting both consumer appliances as well as electric vehicle wireless charging, as made clear by their former ceo, eric giler, in 2009. A simplified circuit diagram showing the circuit level structure of a class d power amplifier 802, impedance matching network 804 and an inductive load 806 is shown in fig. The entire circuit was finally simulated and later fabricated on a pcb.
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