Department - Author 1
Electrical Engineering Department
Degree Name - Author 1
BS in Electrical Engineering
Date
5-2017
Primary Advisor
Richard Murray
Abstract/Summary
Currently, most cell phones utilize wired adapters to charge, which cause a minor hassle when one frequently needs to unplug and replug their device whenever they pick it up to use while it is charging. The charging adapter is a pad that phones can be placed on to wirelessly charge the device. The charging adapter consists of two components: the wireless charging platform to supply and transmit the power, and the wireless charging receiver for phones that do not already have an internal receiver included, specifically targeting newer generation iPhones that utilize a lightning port (i.e. iPhone 5, 6, 6s, 7, 7s). The wireless charging receiver connects to the smartphone through the charging port and rests between the back of the phone and its casing. The entire system fully charges the device to 100% battery capacity within three hours and automatically shuts off upon completion. A unique feature of the charger is that it operates regardless of the orientation of the phone on the pad (an LED indicator notifies the user that the device is charging). The size of the entire charging assembly does not exceed that of a small textbook, allowing ease of transportation and use on a table or surface with limited space. Additionally, the incorporation of an ellipsed surface at the top of the 3D-printed base centers the phone while charging and biases it towards the middle where optimum power transfer is achieved.
Reverse engineering was done on market examples and designs were made to create a charging platform to supply power. Then a development kit was used to test methods of improving the performance.
URL: https://digitalcommons.calpoly.edu/eesp/372