Inductive Ball-Bearing

The ability to transfer power in small moving systems is required for a wide range of applications such as wind power systems with electronics integrated in the rotor blades or highly-automated Industry 4.0 production platforms. The goal of the project is to develop a technology for the contactless transfer of power and data in small moving components in harsh environments.

Project Targets

Realization of an inductive energy transfer for fast moving components

Transmission power up to 20W

Wireless communication of information as well as higher data rates for the transmission of sensor & actuator information



High integration level of the coupling coils

Realization of a rotating transformer with metal parts in the surrounding

High mechanical conditions



Demonstration of the functionality of the rotating application (ball-bearing with shaft)

Practical robustness tests & simulations of electronic assemblies beyond the normative measuring range

Near field transmission at high frequencies including alternative capacitive transmission systems with differential directional coupler

High-quality digital modulation and thermoelectric optimization of the crossover


Project Partners

Research project in cooperation with the Chair of Electron Devices LEB) and further chairs of the Universität Erlangen-Nürnberg

Fraunhofer Institute for Integrated Circuits IIS









Ditze, S., Endruschat, A., Schriefer, T. Rosskopf, A., Heckel, T., Inductive Power Transfer System with a Rotary Transformer for Contactless Energy Transfer on Rotating Applications, 2016 IEEE International Symposium on Circuits and Systems (ISCAS), Montreal, Quebec, Kanada 2016



Gerstner H., Inductive Energy and Data Transmission in Novel Industrial Applications, Embedded Platforms Conference Munich, 10. November 2016