The design of wireless battery charing system for electric scooter bike based on inductive approach

Roszelan, Aina Bahiyyah (2022) The design of wireless battery charing system for electric scooter bike based on inductive approach. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

Wireless Power Transfer (WPT) is the transmission of energy without the need of any physical connection between the device and the power source. By implementing this wireless charging system technology, it can eliminates the danger of electric shock since an adapter plug-in and out is not required as well as the chance of short circuit and cable damag. This project proposes Inductive Power Transfer (IPT) which uses electromagnetic field between inductive coupling that is not impacted by dust and water. This paper proposes a WPT system with a class-E DC to DC converter. Class E Inverter by applying an impedance matching circuit is used to cascade with Class E Rectifier and finally a full circuit design of Class E DC to DC Converter is formed. Simulation of Class E DC to DC Converter in Matlab Simulink with 50% duty cycle and optimum load resistance has obtained 332.63W of DC output power with high operating frequency of 1MHz, zero-voltage-switching (ZVS) condition succesfully achieved in both Class E Inverter and Class E Rectifier and obtained 95.85% of high efficiency power transfer. A 10W prototype has been implemented with the same designed and specification in this project and air gap distance between coupled coils is analyse with efficiency reached up to 63% in 10mm air gap distance.

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