➢ CONCEPT OF SELF CHARGING
➢ ACTUAL SETUP FOR WIRELESS CHARGING
SAMPLE CIRCUITS WITH TWO STAGES
he Cellular revolution has spread to every nook and corner of the world and connected distant parts of the globe. Whether it is for business purpose or for personal use, one needs an efficient way of charging the cell phone battery. But most people probably don’t like being tethered to the wall, as the battery charge is a prime constraint in the uninterrupted communication device. Try Thinking of a system where your cell phone battery being charged while u talk. No more worrying about forgetting to charge the battery. Sound Impossible? The present discussion is to charge the mobile while talking over it. This task can be implemented by making use of the carrier signal obtained after the demodulation of the received modulating signal of the mobile to recharge the cellular phone battery without wires.
This concept basically needs the conversion of AC signal into DC to facilitate the battery charging along with circuitry to raise the voltage level of demodulated carrier signal. In this paper, we present the technique for implementing the same.
Cellular telephone technology became commercially available in the 1980’s. Since then, it has been like a snowball rolling downhill, ever increasing in the number of users and the speed at which the technology advances. When the cellular phone was first implemented, it was enormous in size by today’s standards. This reason is twofold; the battery had to be large, and the circuits themselves were large. The circuits of that time used in electronic devices were made from off the shelf integrated circuits (IC), meaning that usually every part of the circuit had its own package. These packages were also very large. These large circuit boards required large amounts of power, which meant bigger batteries.
This reliance on power was a major contributor to the reason these phones were so big. Through the years, technology has allowed the cellular phone to shrink not only the size of the ICs, but also the batteries. New combinations of materials have made possible the ability to produce batteries that not only are smaller and last longer, but also can be recharged easily. However, as technology has advanced and made our phones smaller and easier to use, we still have one of the original problems: we must plug the phone into the wall in order to recharge the battery. Most people accept this as something that will never change, so they might as well accept it and carry around either extra batteries with them, or a charger. You may identify the significance of the problem from the fact why Indian railways introduced charging socket in railway compartments.
We are being bombarded with energy waves every second of the day. Radio and television towers, satellites orbiting earth, and even the cellular phone antennas are constantly transmitting energy. In the case of the cellular phone, this power could be used to recharge a battery that is constantly being depleted and enable to user to truly stay mobile all through.
2. CONCEPT OF SELF-CHARGING:
Basically mobile receives modulating signal while talking .In receiver part of mobile receives this modulating signal and this will be demodulated. In demodulation the information signal and carrier signal will be separated so that we can use energy of demodulated carrier signal for charging of battery in mobile. The basic idea behind this wireless charging is that we are using the demodulated carrier for charging the battery in cell phone. But actually the...