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A parametric and comparative study of a permanent magnet structure

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Abstract

Permanent magnets remain the primary source of magnetic field in magnetic refrigerators and thermomagnetic motors, generally being evaluated by the \({\Lambda }_{{\text{cool}}}\) parameter, which is applicable to a magnetic field source used in a magnetic refrigeration system. The main objective of this work is to perform a parametric and comparative analysis of a C-shaped and double C-shaped permanent magnet based on a common parameter to any arrangement of magnets, namely the figure of merit \({M}^{*}\). The analysis was conducted through computational modeling and simulation with COMSOL Multiphysics® software. Different soft magnetic materials were used in the simulations and the best-performing material was used in the magnetic circuit of the C-shaped permanent magnet to evaluate the magnetic force acting on a set of gadolinium plates. It was observed that the soft magnetic material has a significant impact on \({M}^{*}\). No significant impact on \({M}^{*}\) was observed regarding to the number of gaps as long as more magnetized blocks are employed in the arrangement. Consequently, a greater gap accompanied by a lower magnetic flux density has the potential to result in an increased magnetostatic force density.

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Data and code availability

The datasets generated during the current study and others information are available from the corresponding author on reasonable request.

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Acknowledgements

The authors acknowledge financial support from Universidade Federal de Pernambuco, Universidade Federal Rural de Pernambuco, Instituto Federal de Educação e Tecnologia de Pernambuco, Fundação de Amparo a Ciência e Pesquisa de Pernambuco (APQ-1361-3.05/12), and Conselho Nacional de Desenvolvimento Científico e Tecnológico (MCTI/CNPQ/Universal 14/2014—460973/2014-2).

Funding

Fundação de Amparo à Pesquisa do Estado de Pernambuco, APQ-1361-3.05/12, Alvaro Antonio Villa Ochoa, Conselho Nacional de Desenvolvimento Científico e Tecnológico, MCTI/CNPQ/Universal 14/2014-460973/2014-2, Alvaro Antonio Villa Ochoa.

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Authors and Affiliations

  1. Unidade Acadêmica do Cabo de Santo Agostinho, Universidade Federal Rural de Pernambuco, Cabo de Santo Agostinho, PE, 54518-430, Brazil

    Alisson Cocci de Souza

  2. Centro de Tecnologia, Universidade Federal de Pernambuco, Recife, PE, 50670-901, Brazil

    Alisson Cocci de Souza, Nadège Bouchonneau, José Ângelo Peixoto da Costa & Alvaro Antonio Villa Ochoa

  3. Centro de Tecnologia, Universidade Federal de Alagoas, Maceió, AL, 57072-970, Brazil

    William Imamura

  4. Departamento de Engenharia Mecânica, Universidade Estadual de Maringá, Maringá, PR, 87020-900, Brazil

    William Imamura

  5. Department of Mechanical Engineering, Graduate School of Science and Technology, Meiji University, Kawasaki, 214-8571, Japan

    Guilherme Hitoshi Kaneko

  6. Instituto Federal de Educação, Ciência e Tecnologia de Pernambuco, Recife, PE, 50740-545, Brazil

    José Ângelo Peixoto da Costa, Gustavo Novaes Pires Leite & Alvaro Antonio Villa Ochoa

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de Souza, A.C., Imamura, W., Kaneko, G.H. et al. A parametric and comparative study of a permanent magnet structure. Appl. Phys. A 130, 200 (2024). https://doi.org/10.1007/s00339-024-07361-6

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