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PIER PIER B PIER C PIER M PIER Letters PIER Photonics
2015-04-16
On the Optimization of Halbach Arrays as Energy Storage Media
By
Daniel Mansson

    Dr. Daniel Mansson

    Division of Electromagnetic Engineering

    Royal Institute of Technology (KTH)

    Sweden

    Homepage

Progress In Electromagnetics Research B, Vol. 62, 277-288, 2015
doi:10.2528/PIERB15021104 | Google Scholar

Abstract
In the paper presented here the optimization of Halbach arrays as storage media for mechanical potential energy is investigated with numerical simulations using FEMM and analytical calculations using the Maxwell stress tensor. Two opposing Halbach arrays form a ``magnetic spring'' and mechanical potential energy is stored when this structure is compressed. It is here seen that the wavelength of the magnetization in the material and the dimensions greatly in fluence the stored energy density. A clear region of maximum is identified which leads to important conclusions on how the material should be employed. The suggested approach for storing energy have advantages and approximately 250 kJ/m3 can be reached. The main drawback is the large prize of rare earth metals such as Neodymium.
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Citation
Daniel Mansson, "On the Optimization of Halbach Arrays as Energy Storage Media," Progress In Electromagnetics Research B, Vol. 62, 277-288, 2015.
doi:10.2528/PIERB15021104
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