Wireless Power Transmission technology is old technology and it was demonstrated by “Nikola Telsa” ( Wireless electercity tesla ). Wireless power transmission mainly uses three main systems such as microwaves, solar cells, and resonance.
Microwaves are used in an electrical device to transmit electromagnetic radiation from a source to a receiver. Accurately the name Wireless electricity states that the electrical power can be transferred from a source to a device without using wires.
Basically, it includes two coils they are a transmitter coil & a receiver coil. Where the transmitter coil is powered by AC current to create a magnetic field, which in turn induces a voltage in the receiver coil.
The basics of wireless power transmission include the inductive energy that can be transmitted from a transmitter coil to a receiver coil through an oscillating magnetic field.
The DC current supplied by a power source is changed into high-frequency AC current by particularly designed electronics built into the transmitter. In the TX (transmitter) section, the AC current increases a copper wire, which creates a magnetic field.
Once an RX (Receiver) coil is located near to the magnetic field, then the magnetic field can induce an AC current in the receiving coil. Electrons in the receiving device convert the AC current back into DC current, which becomes working power.
- Transistor BC547/2n2222 or any NPN Transistor
- Resister 150 Ω To 1KΩ
- 20-30 Gauge Insulated copper wire
Wireless Electricity Transmission Circuit
Wireless power Transmitter
Take a PVC pipe and whirl a wire on it Nine times after whirling a wire about three inches make a loop for center terminal and continue the process. Now take transistor 2N2222 and connect its base terminal to one end of the copper coil, the collector terminal to the other end of the copper coil and now connect the emitter terminal to the negative (–ve) terminal of an AA battery. The center terminal of the copper coil will be connected with the positive (+ve) terminal of an AA battery. When then the receiver coil is placed 1 inch above the transmitter coil, then the LED will blink.
Receiver
Make a 15 turn copper coil and connect a light-emitting diode to its ends.
Wireless Power Transmission Circuit Working
The wireless power transmission can be defined as the energy that can be transmitted from the transmitter to a receiver through an oscillating magnetic field.
To accomplish this, power source (DC current) is changed into high-frequency AC (Alternating Current) by particularly designed electronics erected into the transmitter.
The AC boosts a copper wire coil in the transmitter, which produces a magnetic field. When the receiver coil is placed in proximity of the magnetic field, the magnetic field can make an AC (alternating current) in the receiving coil.
Electronics in the receiving coil then alter the AC back into DC which becomes operating power.
How to make this circuit please see this video
Uses Of This Types of Wireless Power Transmission
The power transfer can be done with the transmitter (primary) to the receiver (secondary) that is separated by a considerable distance (say 3cm). Therefore the power transfer could be seen as the TX transmits and the RX receives the power to run a load.
Moreover, the WPT technique can be used to charge gadgets like mobile phones, laptop batteries, iPods, propeller clock, etc. And also this sort of charging offers a far lower risk of electrical shock. Furthermore, this project can be enhanced by increasing the distance of power transfer as the research across the world is still going on
Thus, this is all about wireless power transmission, wireless power transfer circuit working and its applications which include simple electronic devices like mobile phones, mobile chargers, etc.. Wireless power transfer not only reduces the risk of shock and stops to plug frequently into the sockets. We hope that you have got some basic insights into this concept.