Designing And Implementation Of Wi-Tricity System Control

Ong, Khai Kher (2012) Designing And Implementation Of Wi-Tricity System Control. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

Effective electrical power transfer is the foundation of the modern civilization. However, the traditional ways by electric power cables and electric batteries are often not satisfactory for mobile devices, such as cell-phones, notebooks and robots. Use of plugs and wires limits the mobility. There are various situations in which electrical energy is desired but cannot by conveniently supply. Today, wireless power transfer has only been commercially demonstrated at small distances through use of induction. To address these problems, researchers have been studying wireless power transfer technology or Wi-tricity technology. Wireless energy transfer based on coupled magnetic resonances is a new technology which energy can be transferred via coupled magnetic resonances in the nonradiative near-field. This thesis demonstrated the transfer of wireless power at relatively large distances through radio frequencies in the development of a prototype for a commercial product. A simple energy transfer system structure was proposed in this project. The impact on the voltage and current of receiver coil caused by different transfer distance is investigated and shows that the longer is the distance between the two coils, the lower the voltage and the current of the receiving coil is. The strength of magnetic field is depends on the number of turn of the copper wire at the transmitter coil and receiver coil and the input current to the transmitter coil. Furthermore, this system has been successfully embedded with the IR module and PIC microcontroller to overcome the limitation of the previous Wi-tricity system where the previous system does not have the control system to control the current source supply. For future recommendation, the strength of the magnetic field can be improved by better quality of copper wire. Besides that, the number of turn of coil and the input current source can be increased to improve the strength of the magnetic field.

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