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Tesla began working with Thomas Edison, but the two men were worlds apart in both their science and cultures (the fact that Tesla's alternating-current concept posed a direct threat to sales of Edison's direct-current devices probably didn't help) and they soon went their separate ways. Tesla invented the alternating-current generator that provides your light and electricity, the transformer through which it is sent, and even the high voltage coil of your picture tube. The Tesla Coil, in fact, is used in radios, television sets, and a wide range of other electronic equipment - invented in 1891, no-one's ever come up with anything better. Letting Tesla go wasn't the brightest thing Edison had ever done, though - George Westinghouse promptly snapped up the patent rights to Tesla's alternating-current motors, dynamos, and transformers. The buy-out triggered a power struggle which eventually saw Edison's direct-current systems relegated to second place, and the DC motors installed in German and Irish trains only a few years before, rendered obsolete. Slide 3: What is WiTricity ? -WiTricity, stands for wireless electricity, is a term coined initially by Dave Gerding in 2005 and used by a MIT research team led by prof. Marin Soljačić in 2007, to describe the ability to provide electricity to remote objects without wires (wireless power transfer). This could be useful to power consumer and industrial electronics like cell phones, laptops, etc. -WiTricity, a portmanteau for "wireless electricity", is a trademark of WiTricity corporation referring to their devices and processes which use a form of wireless energy transfer, the ability to provide electrical energy to remote objects without wires using oscillating magnetic fields. The forgotten invention is reborn in 2007 : The forgotten invention is reborn in 2007 The idea of wireless electricity has been around since the early days of the Tesla coil. But thanks to a group of MIT scientists, "WiTricity" (as these scientists call it) is now one step closer to practical reality. Demonstrating the ability to power a 60-watt light bulb from a power source seven feet away without wires might not seem like the most impressive of feats, but the technology behind it has massive implications for how we live our tech-filled, power-hungry lives. Imagine a day when your laptop, MP3 or player are constantly charged by power sent through the air via an electromagnetic field. Slide 5: Overview of Technology WiTricity is based on strong coupling between electromagnetic resonant objects to transfer energy wirelessly between them. This differs from other methods like simple induction, microwaves, or air ionization. The system consists of transmitters and receivers that contain magnetic loop antennas critically tuned to the same frequency. The WiTricity devices are coupled almost entirely with magnetic fields (the electric fields are largely confined within capacitors inside the devices), which is argued to make them safer than resonant power transfer using electric fields . Slide 6: Difference from other mode of technology: -Unlike the far field wireless power transmission systems based on traveling electro-magnetic waves, WiTricity employs near field resonant inductive coupling through magnetic fields similar to those found in transformers except that the primary coil and secondary winding are physically separated, and tuned to resonate to increase their magnetic coupling. These tuned magnetic fields generated by the primary coil can be arranged to interact vigorously with matched secondary windings in distant equipment but far more weakly with any surrounding objects or materials such as radio signals or biological tissue. Slide 7: Experimental demonstration The MIT researchers successfully demonstrated the ability to power a 60 watt light bulb wirelessly, using two 5-turn copper coils of 60 cm (24 in) diameter, that were 2 m (7 ft.) away, at roughly 45% efficiency. The coils were designed to resonate together at 9.9 MHz (= wavelength ca. 30 m) and were oriented along the same axis. One was connected inductively to a power source, and the other one to a bulb. The setup powered the bulb on, even when the direct line of sight was blocked using a wooden panel. The emerging technology was demonstrated by Eric Giler, CEO of the US firm WiTricity, at the TED Global Conference held at Oxford in July 2009. In this demonstration, Giler shows a WiTricity power unit powering a television as well as three different cell phones, the initial problem which inspired Soljacic to get involved with the project. Slide 8: How it would look and work in your office or bedroom Slide 9: Applications Of Witricty Direct Wireless Power—when all the power a device needs is provided wirelessly, and no batteries are required. This mode is for a device that is always used within range of its WiTricity power source. Automatic Wireless Charging—when a device with rechargeable batteries charges itself while still in use or at rest, without requiring a power cord or battery replacement. This mode is for a mobile device that may be used both in and out of range of its WiTricity power source. Slide 10: *Consumer Electronics Automatic wireless charging of mobile electronics (phones, laptops, game controllers, etc.) in home, car, office, Wi-Fi hotspots … while devices are in use and mobile. Direct wireless powering of stationary devices (flat screen TV’s, digital picture frames, home theater accessories, wireless loud speakers, etc.) … eliminating expensive custom wiring, unsightly cables and “wall-wart” power supplies. Direct wireless powering of desktop PC peripherals: wireless mouse, keyboard, printer, speakers, display, etc… eliminating disposable batteries and awkward cabling. Slide 11: *Industrial - Direct wireless power and communication interconnections across rotating and moving “joints” (robots, packaging machinery, assembly machinery, machine tools) … eliminating costly and failure-prone wiring. - Direct wireless power and communication interconnections at points of use in harsh environments (drilling, mining, underwater, etc.) … where it is impractical or impossible to run wires. -Direct wireless power for wireless sensors and actuators, eliminating the need for expensive power wiring or battery replacement and disposal. Automatic wireless charging for mobile robots, automatic guided vehicles, cordless tools and instruments… eliminating complex docking mechanisms, and labor intensive manual recharging and battery replacement. Slide 12: *Transportation Automatic wireless charging for existing electric vehicle classes: golf carts, industrial vehicles. Automatic wireless charging for future hybrid and all-electric passenger and commercial vehicles, at home, in parking garages, at fleet depots, and at remote kiosks. Direct wireless power interconnections to replace costly vehicle wiring harnesses and slip rings. Slide 13: Other Applications Direct wireless power interconnections and automatic wireless charging for implantable medical devices (ventricular assist devices, pacemaker etc.). Automatic wireless charging and for high tech military systems (battery powered mobile devices, covert sensors, unmanned mobile robots and aircraft, etc.). Direct wireless powering and automatic wireless charging of smart cards. Direct wireless powering and automatic wireless charging of consumer appliances, mobile robots, etc. Slide 14: WWW.SPLASHPOWER.COM Splashpower Ltd. is a United Kingdom-based company founded in June 2001. It has been attempting to develop technology for wireless charging of portable devices such as mobile phones, personal digital assistants, mp3 players and cameras. Their system works through electromagnetic induction, adding a free positioning induction loop (at the “SplashPad") to the conventional fix induction loop at the wall plug (used to shift between AC and DC currents). According to the company's claims, rechargeable devices equipped with a small Splash Module are placed upon a mouse pad-sized SplashPad and have their batteries recharged at a normal rate.(Wikipedia) Pros : Pros Significant decluttering of office space No need for meter rooms and electrical closets. Reduction of e-waste by eliminating the need for power cords Need more light in your office, no need for electrician. Simply place the lamp where ever you need it. Incremental or Disruptive : Incremental or Disruptive We believe wireless electricity incremental because it was innovated at the end of the 1800’s and only last year it was improved to a new technology. We can also say that it may become disruptive because if a strong enough product is developed it will wipe out the demand for chargers. Therefore charging will become universal. What it will replace Batteries Cords Slide 17: Thank you You do not have the permission to view this presentation. In order to view it, please contact the author of the presentation.