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Boosting Wireless Charging

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In the near future, charging all of your personal devices could be as simple as putting them on a specially-configured wireless power transfer tablet.

Researchers at Nanyang Technological University’s School of Electrical and Electronic Engineering (EEE), led by Professor So Ping Lam, have created a wireless power transfer system that can wirelessly charge two electronic devices concurrently through a distance of two inches.

Their system sidesteps the disadvantages of other wireless power transfer systems, such as those based on inductive coupling, which suffer from a low degree of misalignment between coils and a strict single input and single output configuration.

The EEE team’s work is based on a coupling method known as magnetic resonant coupling. A transmitter converts high-frequency alternating current into a magnetic field through a coil and transmits it through the air to a receiver. The receiver converts the magnetic field back into alternating current and passes that along to a rectifier. The rectifier turns the alternating current into direct current which then goes through a converter for final voltage regulation before it is used to power the electronic devices.

“We conducted research and experiments on different coil materials, coil diameters, coil distances and resonant frequencies before developing the current version of our wireless power transfer system,” said Professor So Ping Lam from the EEE. The team also plans to investigate how their work could be used to charge electric vehicles wirelessly.

“We believe that wireless power transfer is an emerging technology that offers a convenient, safe and reliable way of charging millions of electronics devices,” said Professor So. “Furthermore, its use is not restricted to consumer electronics. It can also be used for many other applications such as the wireless charging of electric vehicles and wirelessly powered pacemakers and other medical equipment.”


Team Members: Mr Goh Zhi Zhong Amo, Assoc Prof So Ping Lam
Research Centre: Centre for System Intelligence and Efficiency (EXQUISITUS)

 


By Professor So Ping Lam


Click here to find out more.

Published on: 13-June-2018​​​​​
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