26-04-2017, 09:13 AM
28-04-2017, 10:05 AM
This system demonstrates the concept of wireless mobile charging system. The system allows the user to wirelessly charge his mobile phone without connecting the mobile adapter. We show the system using a charging pad where the user hardly needs to place their adapter circuit to charge the mobile phone. For this we use the advanced power transfer concept. For this we use a high frequency transformer to convert the mains input from 230V AC to 12V DC. This output is supplied to the charging coil coil. When the coil of the adapter enters the coil range of the charging pad, the power is transferred wirelessly to the receiving coil and this 12V DC is supplied to the adapter circuit being used To convert this 12 V DC to 5V DC which is then supplied to the mobile phone. So this allows us to charge the mobile phone wirelessly without plugging it in. The system can be further improved by integrating the charging adapter inside the mobile itself so that the user just has to place his mobile phone on the charging platform to charge .
Wireless Power Transfer Circuit Diagram:
![[Image: Wireless-Battery-Charger-Circuit-Diagram.jpg]](http://www.electronicshub.org/wp-content/uploads/2014/07/Wireless-Battery-Charger-Circuit-Diagram.jpg)
Wireless Mobile Charger Circuit Design:
The wireless battery charger circuit design is very simple and easy. These circuits only require resistors, capacitors, diodes, voltage regulator, copper coils and transformer.
In our wireless battery charger, we use two circuits. The first circuit is the transmitter circuit used to produce voltage wirelessly. The transmitter circuit consists of a DC source, oscillator circuit and a transmitter coil. The oscillator circuit consists of two N-channel MOSFETS IRF 540, 4148 diodes. When the direct current is given to the oscillator, the current begins to flow through the two coils L1, L2 and the drain terminal of the transistor. At the same time, a certain voltage appears on the gate terminals of the transistors. One of the transistors is in the state while the other is in the off state. Thus the voltage in the transistor drain which is in the off state raises and falls through the tank circuit made of 6.8nf capacitors and the transmitter coil of 0.674. Thus, the operating frequency is determined using the formula F = 1 / [2π√ (LC)].
In the second circuit which is the receiver circuit is composed of the receiver coil, rectifier circuit and regulator. When the coil of the receiver is placed at a distance close to the inductor, energy is induced in the coil. This is rectified by the rectifier circuit and is regulated to DC 5v using regulator 7805. The rectifier circuit consists of a diode 1n4007 and a capacitor of 6.8nf. The regulator output is connected to the battery.
Wireless Power Transfer Circuit Diagram:
Wireless Mobile Charger Circuit Design:
The wireless battery charger circuit design is very simple and easy. These circuits only require resistors, capacitors, diodes, voltage regulator, copper coils and transformer.
In our wireless battery charger, we use two circuits. The first circuit is the transmitter circuit used to produce voltage wirelessly. The transmitter circuit consists of a DC source, oscillator circuit and a transmitter coil. The oscillator circuit consists of two N-channel MOSFETS IRF 540, 4148 diodes. When the direct current is given to the oscillator, the current begins to flow through the two coils L1, L2 and the drain terminal of the transistor. At the same time, a certain voltage appears on the gate terminals of the transistors. One of the transistors is in the state while the other is in the off state. Thus the voltage in the transistor drain which is in the off state raises and falls through the tank circuit made of 6.8nf capacitors and the transmitter coil of 0.674. Thus, the operating frequency is determined using the formula F = 1 / [2π√ (LC)].
In the second circuit which is the receiver circuit is composed of the receiver coil, rectifier circuit and regulator. When the coil of the receiver is placed at a distance close to the inductor, energy is induced in the coil. This is rectified by the rectifier circuit and is regulated to DC 5v using regulator 7805. The rectifier circuit consists of a diode 1n4007 and a capacitor of 6.8nf. The regulator output is connected to the battery.