The Development Of Wireless Power Transfer Technologies For Multiple Devices An Inductive Approach

Lai, Xingren Kathleen (2017) The Development Of Wireless Power Transfer Technologies For Multiple Devices An Inductive Approach. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

Text (24 Pages) The Development Of Wireless Power Transfer Technologies For Multiple Devices An Inductive Approach.pdf - Submitted Version Download (586kB)

Abstract

Conventionally,the energy or power transfer is done through the connecting wires to power up the electronic appliances but these wires create hazardous and messy environment.With wireless power transfer (WPT) technologies,the used of connecting cord can be reduced. WPT technology is the transmission of electrical energy or power between two points without connecting wire.WPT mechanism is classified into two:near-field transfer and far-field transfer.This project applied the near field transfer because it has higher power transfer efficiency over the far-field transfer in short transmission distance.There are three subtypes of near-field transfer mechanism which are inductive power transfer technique (IPT),capacitive power transfer technique (CPT) and acoustic power transfer technique (APT).IPT is chosen to be the WPT technique in this project due to its higher power efficiency in the transmission distance range of centimetre.The current mechanism deploys class-D inverter which has its limitation in supporting high power efficiency due to it consists of two switching MOSFETs. When the number of MOSFET used increases,the switching loss in term of heating issue will also increase. Therefore,a high-efficiency WPT system which can support four receivers at the same time using Class E inverter for transmitter via inductive power transfer (IPT) has been designed and fabricated instead of Class D inverter. The project performance based on the misalignment distance and the gap between the coils are analysed and discussed in term of output power efficiency.A future development is also recommended.The fabricated system is supplied at 12VDC and capable of delivering power at 5W. During power delivery state,the prototype efficiency is 90.42%.

Actions (login required)

View Item