Electromagnetic Vibration Energy Harvesting Devices

List Of Figures. List Of Tables. Nomenclature. Acknowledgements.

1 Introduction. 1.1 Background And Motivation Of Vibration Energy Harvesting. 1.2 Literature Review And "State Of The Art" In Electromagnetic Vibration Transducers. 1.3 Conclusions From The Literature Review. 1.4 Thesis Objectives.

2 Basic Analytical Tools For The Design Of Resonant Vibration Transducers. 2.1 Introduction. 2.2 Mechanical Subsystem. 2.3 Electromagnetic Subsystem. 2.4 Overall System. 2.5 Characterization And Handling Of Machinery Induced Vibration. 2.6 Conclusions From Analytical Analyses.

3 Power And Voltage Optimization Approach. 3.1 Introduction. 3.2 Investigated Electromagnetic Coupling Architectures. 3.3 Boundary Conditions. 3.4 Magnetic Field Distribution Of Cylindrical And Rectangular Permanent Magnets. 3.5 Optimization Procedure. 3.6 Architecture Specific Calculation Of The Transduction Factor.

4 Optimization Results And Comparison. 4.1 Introduction. 4.2 "Magnet In-Line Coil" Architectures. 4.3 "Magnet Across Coil" Architectures. 4.4 Conclusion And Comparison Of The Coupling Architectures.

5 Experimental Verification Of The Simulation Models. 5.1 Introduction. 5.2 "Magnet In-Line Coil" Architecture. 5.3 "Magnet Across Coil" Architecture. 5.4 Conclusions.

6 Coil Topology Optimization For Transducers Based On Cylindrical Magnets. 6.1 Introduction. 6.2 Formulation Strategy. 6.3 Results Of The Topology Optimization.

7 Application Oriented Design Of A Prototype Vibration Transducer. 7.1 Introduction. 7.2 Basis For The Development. 7.3 Optimization Of The Prototype Electromagnetic Coupling Architecture. 7.4 Resonator Design. 7.5 Prototype Assembling And Performance. 7.6 Conclusions.

8 Conclusions. 8.1 Overview Of Main Findings. 8.2 Suggestions For Further Work.

Appendix A. Appendix B. Appendix C. Appendix D. Preliminary Investigations. Non-resonant vibration transducer. Low frequency tunable transducer. Bibliography.

Dirk Spreemann received the Dipl.-Ing. (FH) degree in Physical engineering from the University of Applied Sciences Ravensburg-Weingarten, in 2005. His diploma thesis focused on miniaturized electromagnetic vibration transducers. Beside the resonant vibration conversion he established one of the first non-resonant conversion mechanisms. While studying Microsystems engineering at the University of Freiburg he worked as a research engineer in the "Energy autonomous systems" group at the Institute of Micromachining and Information Technology HSG-IMIT in Villingen-Schwenningen. In this position he gained considerable experience in developing customized vibration transducers for industrial applications. His research interests lie in the area of micro power generation with a special focus on electromagnetic vibration conversion. In 2011 he received the Dr.-Ing. degree from the University of Freiburg.

Yiannos Manoli holds the Fritz Huettinger Chair of Microelectronics at the Department of Microsystems Engineering (IMTEK), University of Freiburg, Germany. Since 2005 he additionally serves as director of the applied research "Institute of Micromachining and Information Technology" of the "Hahn-Schickard Gesellschaft" (HSG-IMIT).

His research interests are the design of low-voltage and low-power mixed-signal systems with over 300 papers published in these areas. The emphasis lies in Analog-to-Digital converters as well as in energy harvesting and sensor read-out CMOS circuits. Additional research activities concentrate on motion and vibration energy transducers and on inertial sensors.Prof. Manoli received Best Paper Awards from ESSCIRC 2010 and 1988, MWSCAS 2007, MSE 2007, and PowerMEMS 2006. For his creative and effective contributions to the teaching of microelectronics and the design of a web-based animation and visualization of analog circuits (Spicy VOLTsim, www.imtek.de/svs) he received various awards including the Excellence in Teaching Award of the