Contactless Inductive Power and Data Transfer

Contactless Inductive Power and Data Transfer: For use in E-Textiles

Lindeman, Pim (TU Delft Electrical Engineering, Mathematics and Computer Science)

Steijlen, A.S.M. (mentor)
Bossche, A. (mentor)
French, P.J. (graduation committee)
Dong, J. (graduation committee)

Delft University of Technology

Sensor Shorts Project

2022-09-23

Distributing power and data around a garment is a common problem in sensor enabled e-textiles, as connecting separate electronic subsystems together using connectors and wires has proven to be unreliable and cumbersome. In this work a solution is presented that will eliminate the connectors by using two pairs of short-range wireless inductive links. The proposed system is able carry power from one node to the next, while at the same time facilitating data transfer between the nodes. In this work the double inductive link is analysed, and a novel compensation topology is presented. A modified class-E amplifier is proposed to generate a carrier signal, improving the system settling time. Using a placeholder data protocol the system is able to transmit 62mW of regulated power to an external load at a total efficiency of 7.3%, while simultaneously transmitting data at a rate of 8.5kbit/s. Without data transmission it is able to deliver 185mW of DC power at 6.09V unregulated, at an efficiency of 23%. The system is also shown to be capable of handling a maximum bitstream of 240kbit/s.

E-Textile
WPT
Inductive coupling
Inductive data transfer
Resonant coupling

http://resolver.tudelft.nl/uuid:ab449f30-f746-40a9-af84-4e4900187280

Student theses

master thesis

© 2022 Pim Lindeman