Optimization of Magnet and Back-Iron Topologies in Electromagnetic Vibration Energy Harvesters

The sequential using of topology optimization and AM (additive manufacturing) can generate and fabricate superior-performance yet lightweight magneto-structural components. In this paper, a magneto-structural topology optimization method is proposed considering AM constraints to improve the design manufacturability of optimized designs. The design problem is formulated with the weighted combination of magnetic compliance and mechanical compliance as a single objective subjected to two types of manufacturing constraints and the volume fraction constraint. Two important AM constraints are in a sequential manner incorporated into the topology optimization model, in which the overhang angle constraint is followed by the maximum length scale constraint. Corresponding sensitivities of the objective and constraints are derived, and the optimization problem is solved by the MMA (method of moving asymptotes). Two numerical examples and a practical conceptual design of linear motor rotor structure are systematically investigated to demonstrate the effectiveness of the proposed method.

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Review and Analysis of Magnetic Energy Harvesters: A Case Study for Vehicular Applications

Enayati

Asef

2022

IEEE Access

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Energy harvesting (EH), as an enabling technology of energy derivation from ambient sources, has attracted much research attention in wireless sensor network (WSN) context. The magnetic energy harvester (MEH) introduces ambient energy harvesters' most promising technological development. This paper presents a review and analysis of MEH applications in WSN like vehicular systems and technologies. The successful approaches are introduced and classified based on technical characteristics and working principles. The fundamentals of their operation are discussed in detail, and the power points of each method are reviewed. To select the optimal energy harvester, in this work a case study is provided for feeding navigational sensors mounted on a rotating wheel of vehicles. Finally, the performance of the developed MEH model is evaluated and discussed for harvesting energy at the rotating wheels of a ground vehicle. To offer electromagnetic field analysis of the studied MEH, the simulations are performed in Ansys Maxwell software for further harvested power evaluation.

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Optimization of Magnet and Back-Iron Topologies in Electromagnetic Vibration Energy Harvesters

Cited by 5 publications

References 29 publications

Design methodology of magnetic fields and structures for magneto-mechanical resonator based on topology optimization

Design methodology of magnetic fields and structures for magneto-mechanical resonator based on topology optimization

Incorporating additive manufacturing constraints into magneto-structural topology optimization

Review and Analysis of Magnetic Energy Harvesters: A Case Study for Vehicular Applications

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