Characterization of a variable reluctance harvester

14th International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications

物理学;能源学

Kroener, M.^1 ; Moll, N.^1 ; Ravindran, S.K.T.^1 ; Mehne, P.^1 ; Woias, P.^1

Micro Energy Harvesting Technologies University of Freiburg, Department of Microsystems Engineering-IMTEK, Laboratory for Design of Microsystems, Freiburg, Germany^1

关键词: Different-magnetic fields;    Magnetic stray fields;    Measurements of;    Moment of inertia;    Proof of concept;    Realistic scenario;    Surveillance systems;    Variable reluctance;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/557/1/012035/pdf
DOI  :  10.1088/1742-6596/557/1/012035

来源: IOP

【 摘 要 】

In our last year's PowerMEMS contribution we presented a proof-of-concept of a variable reluctance harvester for the application in a railroad surveillance system. It was shown that intermittently closing a magnetic circuit could supply power output in the range of mW's. The test setup used showed unwanted energy pickup from the electro motor used. In this paper we present thorough measurements of the reluctance circuit with a compressed air motor to exclude the effects of the above mentioned magnetic stray fields. The effects of eddy currents and moment of inertia on the output power, the optimal coil position on the stators, and effects of different magnetic field strengths are studied. The gap width is set to a fixed value of 14 mm, representing a realistic scenario.