Radio Energy has existed for many years, the principles around wireless electricity date back to the early 1900′s when Nikola Tesla conducted a series of experiments proving that it was possible to transmit electricity without the need of wires. In fact to send electricity through the air without wires is fairly simple.
Gennex as with many other new companies have extensively researched the idea of inductive coupling to improve people’s lives and reduce the amount of components in the assembly line.
In order to better understand how it all works, we will explore the foundations of physics and electromagnetic induction.
The Earth for Energy
Research dating back as far as 1867 has shown that we can use the Earth’s natural magnetic field as the starting field for a self-excited electric generator. Physicist Cromwell Varley discovered that an electric generator did not need to be started with a conventional prime mover. He used the Earth’s magnetic field to induce enough field strength in the stator windings to get a generator running, the possibility of generating AC current also exist using Electrodynamic tethers and a double cathode tube.
Electricity has electrons which flow through either a wire or another good conductor; when the electrons flow we call this current. Current can move through the atmosphere, like a lightning bolt or even through water it is a very good way to get electrical energy from one location to another.
Magnetism is a natural force found in certain types of materials that attract or repel each other. Magnets create magnetic fields; these cannot be seen. The lines of magnetic force fill the space around the magnet, where they can attract or repel magnetic material.
Oscillating magnetic fields vary with time, and can be generated by alternating current (AC) flowing on a wire. The strength, direction, and extent of magnetic fields are often represented and visualized by drawings of the magnetic field lines.
When an electric current flows in a wire it creates a magnetic field around the wire. By winding the wire into a coil we are able to strengthen the magnetic field. Electromagnets are made from coils like this.
The Strength of an Electromagnetic Field
We can make an electromagnet stronger by doing the following things:
- wrapping the coil around an iron core
- adding more turns to the coil
- increasing the current flowing through the coil
The Magnetic Field of an Electromagnet
The magnetic field around an electromagnet is just the same as the one around a bar magnet. It can, however, be reversed by turning the battery around.Unlike bar magnets, which are permanent magnets, the magnetism of electromagnets can be turned on and off just by closing or opening the switch.
A loop or coil of conductive material like copper, carrying an alternating current (AC), is a very efficient structure for generating or capturing a magnetic field.
A voltage is produced when a magnet is moved into a coil of wire. This process is called induction. The direction of the induced voltage is reversed when the magnet is moved out of the coil again. It can also be reversed if the other pole of the magnet is moved into the coil.If the coil is part of a complete circuit then a current will be induced in the circuit.
Electromagnetic Induction Coupling
Electromagnetic coupling occurs when an energy source has a means of transferring energy from one object to another. Magnetic coupling occurs when the magnetic field of one object interacts with another.
This is how many of Gennex induction-based products work.
Induction coupled systems are good for up to a few inches right now so they are ideal for short range charging of battery devices and powering LED lights.
If you want more information or to view future articles explaining more about wireless energy transfer stay connected to our blogs.