Abstract
Advances in material science and semiconductor technology have enabled a variety of inventions to be implemented in electronic systems and devices used in the medical, telecommunications, and consumer electronics sectors. In this paper, a wireless charging system is described as a wearable body heater that uses a chair as a transmitter (Tx). This system incorporates the widely accepted Qi wireless charging standard. Alignment conditions of a linear three-element coil arrangement and a 3 × 3 coil matrix array are investigated using voltage induced in a coil as a performance indicator. The efficiency obtained is demonstrated to be up to 80% for a voltage of over 6.5 Volts and a power transfer of over 5 Watts. Our results and proposed approach can be useful for many applications. This is because the wireless charging system described herein can help design seating areas for the elderly and disabled, commercial systems, consumer electronics, medical devices, electronic textiles (e-textiles), and other electronic systems and devices.
Highlights
Smart clothing is a new trend in wearable technology aimed at improving human life and satisfaction
Two main commercial wireless power transfer (WPT) standards exist: (i) the Qi standard created by the wireless power consortium (WPC) and (ii) the A4WP standard the air fuel alliance (AFA)
This paper investigates and examines alignment and power transfer conditions of the charging area on a chair’s backrest, considering different coil arrangements and arrays
Summary
Smart clothing is a new trend in wearable technology aimed at improving human life and satisfaction. Two main commercial WPT standards exist: (i) the Qi standard created by the wireless power consortium (WPC) and (ii) the A4WP standard the air fuel alliance (AFA) Both standards enable wireless charging techniques that use magnetic induction to transfer power from a transmitter (Tx) to a corresponding receiver (Rx) within a target device. In our proposed design as reported in this paper, which is based on the widely accepted Qi wireless charging standard, the transmitter of the WPT system is integrated within a backrest of a chair, while the WPT system’s receiver is integrated in the user’s belt together with a novel far-infrared heating element (see Figs 1(a) and 1(b)). The proposed WPT charging and heating system can be seamlessly integrated into the user’s life with ease and comfort
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