Wireless Power Transfer for Cell Phones

2017 ELE Engineering Design Project (XF06)

Faculty Lab Coordinator

Xavier Fernando

Topic Category

Power / Controls


Wireless Power transfer was first demonstrated by Nikola Tesla in the 1890s, however it is only really in the last decade that the technology has been harnessed to the point where it offers real, tangible benefits to real world applications. In particular, the development of resonant wireless power technology for the Consumer Electronics market, has seen charging by induction (wireless charging) deliver new levels of convenience for the charging of millions of everyday devices.


The objective of this project is to develop a device for wireless power transfer with high efficiency. This unit shall actually charge a cell phone.

Partial Specifications

The system shall work with 60 HZ, 120 V supply and charge a cell phone.
The Conversion efficiency has to be over 70%.

Suggested Approach

To achieve wireless power transfer, 60 Hz Alternating Current (AC) current is inverted to DC. This it is converted into high frequency AC by specially designed electronics built into the transmitter.

The alternating current energizes a copper wire coil in the transmitter, which generates a magnetic field. Once a second (receiver) coil is placed within proximity of the magnetic field, the field can induce an alternating current in the receiving coil.

Electronics in the receiving device then converts the alternating current back into direct current, which becomes usable power.

Group Responsibilities

The full group is responsible for the whole project.

Student A Responsibilities

Transmitter module

Student B Responsibilities

Cellphone receiver

Student C Responsibilities

Maximizing the power conversion

Course Co-requisites


XF06: Wireless Power Transfer for Cell Phones | Xavier Fernando | Not yet submitted at No time