Asee peer logo

Using the KEEN Framework and the System Engineering Approach for Design and Development of Affordable Wireless Power Transfer using Inductive Coupling for Application in Earphone Charging

Download Paper |


2019 ASEE Annual Conference & Exposition


Tampa, Florida

Publication Date

June 15, 2019

Start Date

June 15, 2019

End Date

June 19, 2019

Conference Session

Entrepreneurship & Engineering Innovation Division Technical Session 5

Tagged Division

Entrepreneurship & Engineering Innovation

Tagged Topic


Page Count




Permanent URL

Download Count


Request a correction

Paper Authors


John M. Santiago Jr Colorado Technical University

visit author page

Professor John Santiago has been a technical engineer, manager, and executive with more than 26 years of leadership positions in technical program management, acquisition development and operation research support while in the United States Air Force. He currently has over 18 years of teaching experience at the university level and taught over 40 different graduate and undergraduate courses in electrical engineering, systems engineering, physics and mathematics. He has over 30 published papers and/or technical presentations while spearheading over 40 international scientific and engineering conferences/workshops as a steering committee member while assigned in Europe. Professor Santiago has experience in many engineering disciplines and missions including: control and modeling of large flexible space structures, communications system, electro-optics, high-energy lasers, missile seekers/sensors for precision guided munitions, image processing/recognition, information technologies, space, air and missile warning, missile defense, and homeland defense.

His interests includes: interactive multimedia for e-books, interactive video learning, and 3D/2D animation. Professor Santiago recently published a book entitled, “Circuit Analysis for Dummies” in 2013 after being discovered on YouTube. Professor Santiago received several teaching awards from the United States Air Force Academy and CTU. In 2015, he was awarded CTU’s Faculty of the Year for Teaching Innovations. Professor Santiago has been a 12-time invited speaker in celebration of Asian-Pacific American Heritage Month giving multi-media presentations on leadership, diversity and opportunity at various military installations in Colorado and Wyoming.

visit author page


Jing Guo Colorado Technical University

visit author page

Dr. Jing Guo is a Wireless Device Applications Engineer at Keysight Technologies and an adjunct professor at Colorado Technical University (CTU) . She was a Professor in Engineering Department at Colorado Technical University. She has 14 years of teaching experience at the university level and taught over 30 different undergraduate and graduate courses in Electrical and Computer Engineering area.

visit author page

Download Paper |


The Kern Entrepreneurial Engineering Network (KEEN) structure has been used to plan, design and develop a project using a system engineering approach to implement wireless power transfer. As a new technology, wireless power transfer allows transmission of electric power without connecting to physical connectors. The electricity can be delivered through an air gap from transmitter to receiver. Wireless power charging technology has become popular in recent years while being widely adopted into many devices such as portable electronics and electric vehicles. Wireless power charging technology has huge potential, bringing advantages not only to industries but also to consumers.

Inductive coupling and resonant inductive coupling are the two mostly used wireless charging technologies on market today. In this project, inductive coupling technology will be used to design, build, and implement a wireless power charging system for wireless earphone headsets. This project mainly focuses on designing a wireless charging system for wireless earphone headsets. The wireless charging system is designed such that it is easy and convenient to use.

The project also focuses on how to reduce the overall manufacturing price for the product. After performing the market research, most of the wireless charging earphone on market today costs more than $80. Affordable components are selected in this project and the total cost of $20 is achieved to design and build this product. In addition, very few wireless charging earphone headsets are sold on market today. In comparison, the commercial product is four times more expensive than the product designed and built in this project. However, additional cost needs to be added to include marketing and distribution.

The final product is composed of a transmitter station and a receiver station. The transmitter station functions as a charging station sending electric power to the receiver station through an air gap. The receiver station is the earphone headset having a combination of a wireless receiver module and receiver coil. Based on the KEEN framework, this project is targeted to maintain current market trends, designing an affordable and an easy to use wireless charger for Bluetooth headsets.

The product is composed of four sub-systems: AC adapter (AC-to-DC converter), wireless power transmitter module, wireless power receiver module, and earphone headset with battery sealed inside. Based on the Vee-Model for modeling the system engineering process, requirements were generated for each sub-system and then carefully tested in the laboratory before final assembling. In this 11-week course, a deliverable is required for each week and when necessary to meet with the instructor as required to keep the project on track and within scope. To develop additional skills, an online 3D design software is used to design the 3D layout of charging station and was successfully printed out. The transmitter module is placed inside the charging station while the top and bottom parts of charging station is fixed together with glue. After the design and hardware implementation, the final product was successfully built and tested without any major issues.

Santiago, J. M., & Guo, J. (2019, June), Using the KEEN Framework and the System Engineering Approach for Design and Development of Affordable Wireless Power Transfer using Inductive Coupling for Application in Earphone Charging Paper presented at 2019 ASEE Annual Conference & Exposition , Tampa, Florida. 10.18260/1-2--33520

ASEE holds the copyright on this document. It may be read by the public free of charge. Authors may archive their work on personal websites or in institutional repositories with the following citation: © 2019 American Society for Engineering Education. Other scholars may excerpt or quote from these materials with the same citation. When excerpting or quoting from Conference Proceedings, authors should, in addition to noting the ASEE copyright, list all the original authors and their institutions and name the host city of the conference. - Last updated April 1, 2015