DESIGN AND CONSTRUCTION OF AN ELECTRIC CHARGER USING INDUCTIVE COUPLING
Abstract
Wireless charging system described by using the method of inductive coupling, in this project, oscillation circuit converts DC energy to AC energy (transmitter coil) to transmit magnetic field by passing frequency and then induce the receiver coil. The properties of Induction coupling are wave (magnetic field-wideband), range (very short~cm), efficiency (high) and operation frequency (LF-band~several handred kHz).The project shows as a small charging for 5V battery of phone in this method. The system bases on coupling magnetic field, then designed and constructed as two parts. There are transmitter part and receiver part. The transmitter coil (transmitter part) transmits coupling magnetic field to receiver coil (receiver part) by passing frequency at about 1.67MHz. The Ampere’s law, Biot-Savart law and Faraday law are used to calculate the inductive coupling between the transmitter coil and the receiver coil. The calculation of this law shows how many power transfer in receiver part when how many distance between the transmitter coil and the receiver coil. The system is safe for users and neighboring electronic devices. To get more accurate wireless charging system, it needs to change the design of the following keywords
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