윤상원
2017-02-10T00:20:56Z
2017-02-10T00:20:56Z
2015-06
IEEE TRANSACTIONS ON MAGNETICS, v. 51, NO 6, Page. 1-7
0018-9464
1941-0069
http://ieeexplore.ieee.org/abstract/document/6990613/
http://hdl.handle.net/20.500.11754/25434
This paper proposes an approach to systematically find the optimal geometry of electromagnetic energy harvesters through topology optimization. The energy harvesters designed herein have a pickup coil and permanent magnets (PMs) integrated with a magnetic back iron, completing a closed-loop magnetic circuit. The configuration and geometries of the PMs and back iron are simultaneously determined using topology optimization. The optimization goal is to maximize the root-mean-square (rms) value of the harvested output voltage, which is calculated based on the Lagrange polynomial interpolation with finite-element analysis. The sensitivity needed to solve the optimization problems is obtained using the adjoint variable method. The proposed optimization approach successfully determines the optimal design of the PMs and back irons. The optimized design consists of two PM pieces with opposite magnetization directions (to rapidly alternate the magnetic field direction) and shaped back irons (to minimize the magnetic reluctance). The optimized design significantly improves the electromagnetic performance of harvesters (a 42.5x increase in the rms output voltage with decreases in the volumes of the PM and iron), compared with an initial benchmark design determined through intuition.
This work was supported in part by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education under Grant 2013R1A1A2058086 and Grant 2014R1A1A2056131, and in part by the Ministry of Science, Information and Communication Technology (ICT), and Future Planning, Korea, under the Convergence Information Technology Research Center (C-ITRC) (IITP-2015-H8601-15-1005) supervised by the Institute for Information and Communications Technology Promotion (HTP).
en
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Energy harvester
finite-element methods
magnetic back iron
permanent magnets (PMs)
topology optimization
Optimization of Magnet and Back-Iron Topologies in Electromagnetic Vibration Energy Harvesters
Article
6
51
10.1109/TMAG.2014.2382596
1-7
IEEE TRANSACTIONS ON MAGNETICS
Lee, Jaewook
Yoon, Sang Won
2015003355
S
COLLEGE OF ENGINEERING[S]
DEPARTMENT OF AUTOMOTIVE ENGINEERING
swyoon