Wireless Power Supply » Witricity

Sony Develops a Highly Efficient Wireless Power System

Mayram — Tue, 16 Feb 2010 17:55:31 +0000

How many times have you hoped and wished for a wireless solution to those power cables running all around your systems ? Well, here is an answer to your prayers. Sony has come up with its recent innovation : Wireless Power Transfer System.

The concept of Wireless Power has been in news for some time now. Lot of researchers have been working to find a breakthrough in the system to be able to charge the electronic devices without the aid of wires. A team from MIT came up with the concept of WiTricity ( as in Wireless Electicity) and demonstrated it by lighting a 60W electrical bulb that was wirlessly connected to the power source seven feet away. The concept has been based on magnetic resonance by which electromagnetic energy is transmitted to those receivers that have the identical resonant frequencies as the transmitting device.

With magnetic resonance as the base, Sony Corporation has developed a prototype system that can transmit 60W electricity to a a device situated at about 50-80 cms away. The power transmission between the transmission and the recipient devices is 80% efficient. When a rectifier circuit is included, the efficieny is still 60%. Sony has built a repeater device that can increase the transmission range. The repeater device, being a passive component, is placed between the transmitting and the receieving devices to relay magnetic resonance.

So the time is not very far away when one can have a clutter-free TV set hooked onto the wall. And the countdown for a complete wireless world has begun.

A New TV That Uses Wireless Power System

Mayram — Mon, 25 Jan 2010 14:08:48 +0000

The electronics maker Haier demonstrated a new kind of TV in a Consumer Electronics Show that uses a wireless power system reducing the clutter behind the TV. Wireless electricity is a nascent technology but not more and more electronics companies are taking interest in eliminating the cables lying around in your home. Wireless TV is the new entry. There are already several wireless electricity providers such as Power Mat which provides equipment to charge phones, iPods and iPhones with a single charging mat.

Haier’s wireless TV is not available in the market yet but it is an indication of what is coming. Televisions have already gotten ultra slim and can produce HD video without using very little space in your living room. However, TVs are still somewhat “wired” and you connect the DVD players, power cords and other cables although you could use some costly alternatives to reduce to the clutter to some extent. It is a good sign that manufacturers are coming up with electronics without cables.

Wireless Powered TV

The wireless power system was supplied to Haier was developed by Witricity. Power transfer is made possible through a coil on the back of the TV that receives power from another device plugged into a wall socket that resonates and the energy is transferred using a magnetic near field.

This TV also features Wireless Home Digital Interface (WHDI), which can stream 1080p content at 3 Gbps. It works at distances up to about 100 feet away. So there’s no need for video input cables either. The company did not provide a time-line for a consumer release. It appears it may take 6 months to an year before you can purchase it for your home.

This product was chosen to receive a 2010 CES “Product of the Future Award” from POPULAR SCIENCE.

WiTricity Demos Wireless Power Supply

Mayram — Tue, 27 Oct 2009 12:54:22 +0000

Eric Giler CEO of WiTricity, a startup company set out to offer wireless electricity demos how wireless power supply would work. The technology was developed by an MIT team led by theoretical physicist Marin Soljaƒçiƒá. WiTricity is one of several startups developing tech to safely transmit power through the air.

The technology at the core of WiTricity’s approach is called magnetic coupled resonance, which can provoke an energetic response at a distance between two coils, one powered, the other not. If the two coils are correctly tuned to one another, energy flows from the connected one (installed, say, on the ceiling of a room) into the other (inside, say, your laptop). Giler presented a demo of it at TEDGlobal 2009.

Witricity’s Plans for Wireless Electricity

Mayram — Mon, 27 Jul 2009 23:37:18 +0000

BBC News reports that -

“For a few years now the idea of wireless power has been a shining light in the lives of gadgeteers, whose homes resemble cable repositories. At the TED Global 2009 conference this week, it got one step closer. Eric Giler, chief executive of Witricity unveiled the concept which is based on an idea by MIT’s Marin Soljacic and exploits the resonance of low frequency electromagnetic waves.

The system uses two coils, one at the mains and one on the gadget, both of which have been engineered with the same resonant frequency. When connected up to an electricity supply, the mains coil produces a magnetic field that resonates with the second coil, allowing voltage to build up to power the gadget. The technology could even be used for electric cars, which could be charged up from a mat placed beneath its wheels in the garage.

Giler showed off a TV and two phones — a Google G1 and an iPhone — which had been adapted to use the technology. He did, however, admit that the Cupertino product had been a harder nut to crack. “They don’t make it easy at Apple to get inside their phones so we put a little sleeve on the back,” he said. There had even, he added, been a proposal for an electrically-heated dog bowl. “You go from the sublime to the ridiculous.”

The complete report which has video demo and detailed analysis about wireless electricity can be accessed from here