Abstract
This work describes the implementation of an RF based wireless charging system using RF transmitting and receiving modules. The objective of this work is to implement a system that has the ability to interact and communicate wirelessly within short range. This mobile wireless charging switching system consists of two sections, the transmitting and the receiving section. Each section was interfaced to 433MHz transmitting and receiving modules. The transmitter section of the wireless mobile charging system sends bursts of 433MHz signal through push button switch which is used in the initiation of the charging process to the receiver; when this signal is received by the receiver, it activates a relay which in turn switches on the internal power that comprises the backup battery, DC-to DC converter via a Universal Serial Bus (USB) port to the mobile device to begin charging. This work was able to achieve a wireless transfer of power for distance of about one metre between the transmitter and the receiver.Keywords: wireless charging, radio frequency radiation, electromagnetic induction, inductive coupling, microcontroller,
Highlights
Wireless power transfer makes it possible to charge mobile devices wirelessly through a concept called Wireless Power Transmission (WPT)
The RFID tag is passive because the chip inside it is powered by the signal that incidents on it
2.0 MATERIALS Components used include Peripheral Interface Controller (PIC) microcontroller (PIC12F675) which is an 8-bit microcontroller that comes in an 8 pin Dual Inline (DIL) package with 8K of flash memory, and 256 bytes of EEPROM data memory
Summary
Wireless power transfer makes it possible to charge mobile devices wirelessly through a concept called Wireless Power Transmission (WPT). There was a transfer of about 7.4W of energy when the transmitter and receiver were about 1.3 inches apart They made a suggestion of possibly improving on this design by changing the power rating of the Metal Oxide Semiconductor Field Effect Transistor (MOSFET). A wireless power transfer between a transmitter and a receiver using magnetic coupling was implemented. This innovative receiver design greatly improved the power conversion efficiency. The transmitter was an Amplitude Shift Keying (ASK) transmitter module designed for remote control, wireless mouse and car alarm system operating at 315/433.92MHz
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