Wireless Electricity

WiTricity is strong coupling between electromagnetic resonant objects based wireless transfer of energy between them. This differs from other methods such as simple induction, microwave or air ionization. The system consists of transmitter and receiver, magnetic loop antennas contain critical to the same frequency. Because of the range of the electromagnetic field in the vicinity, do not have the receivers more than a quarter wavelength of the transmitter

In contrast to the far field wireless power transmission systems based on traveling electromagnetic waves that employs near field inductive coupling WiTricity by magnetic fields similar to those used in transformers, except that the primary and secondary windings physically separated, turned and found their response to increasing magnetic coupling. This concerted magnetic fields can be generated by the primary coil to interact energetically matched secondary windings arranged in remote devices, but much weaker with each surrounding objects or materials such as radio signals or biological tissue.

WiTricity particular on the use of the “strong bond” resonance to a high power transmission efficiency will be achieved. Aristeidis Karalis, referring to the team’s formation experimental evidence, says that “the usual non-resonant magnetic induction would be almost 1 million times less efficient in this system.” The lead researcher for the delay on the technology to develop restrictions on known physical laws and a simple lack of need. Only recently have modern consumers receive a high number of portable electronic devices, currently the batteries and chargers Plug-in

Introduction to WiTricity:

Electricity is now a necessity of modern life. It is hard to pass the day without electricity. The conventional use of electricity is possible through the use of wires. However, researchers at MIT have developed a means of providing electricity without wires.

WiTricity, a case for wireless power is a term originally coined by Dave Gerding in 2005 and is led by an MIT research team led by Prof. Marin Soljacic in 2007. This principle of the current wireless works on the principle of using coupled resonant objects circuits for the transmission of electricity. The system consists of WiTricity transmitter and receiver, magnetic loop antennas contain critical to the same frequency. Wireless power is not a new idea, Nikola Tesla, a “transmitting electrical energy without wires showed” that depends on the electrical conductivity as early as 1891st

The recipient uses the same principle as radio receivers, where the device must be in the range of the transmitter. It is with the help of the resonant magnetic fields generated witrecity electricity, while reducing the waste of energy. This is different than the principle of Nikola Tesla in the later part of the 19th Century adopted, where heat-based systems were used. This project aims to WiTricity transmission in the range of 100 watts. The products may be in the future with WiTricity could Witric or his Witric’s.

So far could the MIT researchers to power a 60 watt bulb from a power source, which is about seven meters away, while the provision of forty percent efficiency. This was made possible by two copper coils that twenty inches in diameter, which were designed so that they were a response in the MHz range together. One of these coils were on a power source, while the others, connected to a light bulb. With this setup WiTricity, got the light bulb turned on, even if the coil is not in sight.

WiTricity technology: The Basics

Understand what is WiTricity technology, the transmission of electric energy or power over the distance without cables simple. Understanding how it works, is a little complicated, but it does not require an engineering degree. We are the basics of electricity and magnetism, click Start, and work our way up to the WiTricity technology.

Electricity: The flow of electrons (electricity) through a conductor (eg a wire) or charge through the atmosphere (like a flash). A convenient way for the energy to get from one place to another.

Magnetism: A fundamental force of nature that caused certain types of materials attract or repel each other. Permanent-magnet, like the ones on your refrigerator and the magnetic field of the earth, examples of objects with constantmagnetic fields. Oscillating magnetic fields will vary with time and can be alternating current (AC) generates flows on a wire. The strength, direction and magnitude of the magnetic fields are often represented and visualized by drawings of the magnetic field lines.

 

When electric current flows in one wire I, creating a magnetic field B, which wraps around the wire. If the current reverses direction, the magnetic field reverses its direction.

 

The blue lines represent the magnetic field produced when current flows through a coil. If the current reverses direction, the magnetic field reverses its direction.

Electromagnetism: A term for the mutual dependence of the time-varying electric and magnetic fields. For example, as it turns out that an oscillating magnetic field generates an electric field and an oscillating electric field generates a magnetic field.

Magnetic induction: a loop or a coil of conductive material such as copper wear an alternating current (AC), is a very efficient structure for the production or acquisition of a magnetic field. When a conductor loop is connected to a power source, it will generate an oscillating magnetic field in the vicinity of the loop. A second conductor loop, brought close enough to the first, can “capture” that a certain proportion of the oscillating magnetic field, which in turn creates or induces an electric current in the second coil. The electricity produced in the second coil can be used to power devices. This type of transmission of electrical energy from a loop or other coil is known and referred to as magnetic induction. Some common examples of devices based on magnetic induction of electrical transformers and generators.

Energy / Power coupling: Energy coupling occurs when an energy source has a means of transferring energy to another object. A simple example is a locomotive of a train car, the mechanical coupling between the two allows the locomotive pulling the train, and overcome the friction forces and inertia that the train to keep still, and the train is moving. Magnetic coupling occurs when the magnetic field of an object

 

An electrical transformer is a device that uses magnetic induction to its primary energy from its secondary winding without transferring the windings connected to each other. It is used to “transform” at a voltage alternating current to alternating current at a different voltage.

interacts with a second object and induces an electric current in or on the object. In this way, electrical energy from a power source to be transmitted with a powered device. In contrast to the example given of the mechanical linkage for the train, not magnetic coupling does not require physical contact between the object and the object generate the energy or will to catch that energy.

Resonance:

This video shows how a wine glass sound energy collected at its natural resonance frequency ocillates, converts it into mechanical energy, which deform the glass on the same frequency and eventually caused it to break causes.

Resonance: Resonance is a property that exists in many different physical systems. It can be thought of as the natural frequency, can be added to the energy as efficiently as possible to an oscillating system. A playground swing is an example of an oscillating system with potential energy and kinetic energy. The child swings back and forth at a rate that is determined by the length of the swing. The child can go to swing higher, if properly coordinated arm and leg action with the movement of the swing. The swing is efficient at its resonant frequency oscillating movements of the Child and the simple energy to the system. The resonance frequency depends on the size, shape and thickness of the material.

Resonant magnetic coupling: Magnetic coupling occurs when two objects exchange energy through their changing or oscillating magnetic fields. Resonant coupling occurs when the natural frequencies of the two objects are about the same.

 

Two idealized resonant magnetic coils in yellow. The blue and red streaks illustrate their magnetic fields. The coupling of the respective fields is specified by the combination of color bands.

Technology WiTricity: WiTricity source of electricity and capture devices are specially designed magnetic resonators, designed to transmit power efficiently over long distances on the magnetic near field. This proprietary source and device designs and the electronic systems they support an efficient energy transfer over distances that are multiples of the size of the sources / devices to control themselves.

 

The WiTricity source, left, is connected to the mains. The blue lines represent the magnetic field near the power source induced. The yellow lines represent the flow of energy from the source to the deposition WiTicity coil, which is shown switching on a light bulb. Note that this diagram also shows how the magnetic field (blue lines) can wrap around a conductive barrier between the source and the recording device.

Step 1:

 

A circuit [A] fixed to the wall socket converts] the standard 60-hertz power to 10 megahertz, and it feeds the transmitting coil [B. The oscillating flow within the transmitting coil causes the coil to send out a 10-megahertz magnetic field.

 

STEP 2:

 

The receiving coil [C] has the exact same dimensions as the sending coil, vibrates at the same frequency and in a process called magnetic induction, from the energy of the first coil, the magnetic field.

 

STEP 3:

 

The energy of the oscillating magnetic field induces an electric current in the receiver coil, the light bulb [D].

 

 

MRI machines use “nuclear magnetic resonance imaging” to produce diagnostic images of soft tissue. Many people assume that WiTricity’s “Resonant Magnetic Coupling” must be similar to magnetic resonance imaging (MRI) technology, but the technologies are similar in name only. MRI is, as the name suggests, a technology for the use of magnetism as a basis for diagnostic imaging of soft tissues of the human body. It uses a strong magnet DC geared to the magnetic fields of the atoms in the tissue, and high-frequency fields to manipulate the atoms in a selective manner so that the tissues and structures are clearly shown. The “resonance” within the meaning of “MRI” refers to the resonance of the atomic structures. MRI is not as a method of wireless energy.

In the late 1800s and early 1900s at the dawn of the electrification of the modern world, some scientists and engineers believed that with wires, electricity anywhere, it would be to any place that they could be used to generate expensive transfer was practical. Nikola Tesla, one of the most famous of these scientists known, had a vision for a world that would reach in the wireless wireless power and communication technologies throughout the world, providing information and power to ships at sea, factories and every house on the planet . Tesla contributed significantly to our understanding of electricity and electrical systems and is credited with inventing three-phase AC systems, motors, fluorescent lighting, radio transmission, and various types of wireless transmission of electrical energy. WiTricity technology for the transmission is different than the technology that is made by Tesla planned, but his work recognized and published in scientific articles, by the creation of technical WiTricity team.

 

Nikola Tesla Wardenclyffe tower on Long Iceland, NY built in 1904. This tower was put on Tesla’s vision of power and information around the world. The tower was destroyed in 1917.

WiTricity technology is a non-radiation mode of energy transfer, but relies on the magnetic field in the vicinity. Magnetic fields interact very weakly with biological organisms and human beings and animals are considered scientifically to be safe. Professor Sir John Pendry of Imperial College London, a world-renowned physicist, explains: “The body is very sensitive to electric fields, why to be a chicken in the microwave is cooking. But it does not respond to magnetic fields. As far as we know the body is almost zero response to magnetic fields in relation to the amount of power has receives it. “demonstrate the safety of magnetic fields is illustrated by the broad acceptance and security of the budget of a magnetic induction hobs. By special design of the WiTricity source, electric fields are contained almost entirely within the source code. This construction results in the amount of electric and magnetic fields, which are also regulatory requirements. Sun WiTricitytechnology no reason to radio frequency emissions to interfere with other electronic devices, and not a source of electric and magnetic fields that are hazardous to humans or animals.

set limits for human exposure to magnetic fields with bodies such as the FCC, ICNIRP and are on a broad scientific and medical consensus. WiTricitytechnology is designed to fully compatible with the existing rules on magnetic fields and electromagnetic radiation.

ADVANTAGES OF WiTricity:

WiTricitytechnology can be made available:

WiTricity In future:

Imagine the future, with WiTricity, where there will be no need for power cables and batteries. The city must only WiTricity hot spots are covered, with your e-gadget battery cable and free to make more comfortable to wear and use much easier. With WiTricity, there will be no need for charging batteries or buying new batteries for your electrical devices.

 

APPLICATIONS:

Consumer Electronics:

Industrial:

Transportation:

Other applications:

 

Conclusion:

WiTricity technology is a non-radiation mode of energy transfer, but relies on the magnetic field in the vicinity. Magnetic fields interact very weakly with biological organisms, humans and animals are considered scientifically to be safe. WiTricity products are designed to comply with applicable safety standards and regulations. Therefore WiTricity technology is safe. WiTricity transmission may depend on the source and receiver. if it is relatively close to each other, and can exceed 95%. The efficiency is mainly determined by the distance between the source and recording device, but the shape can affect the efficiency. It can transfer the power through walls. Traditional magnetic induction requires that capture the power source and device are very close together, usually within millimeters efficiently transferred to power. WiTricitytechnology is strongly resonant strong coupling based, and can even transmit electricity efficiently if the distances between the source and recording device several times the size of the devices themselves.