Electromagnetic field in superconductor samples using a partitioned E-H finite element scheme

15 de março de 2019

The need for new numerical methods that can reduce the time computation for non-linear instantaneous field problems is increasing as for example applications for HTS materials become more and more important. This work proposes a novel numerical approach suitable for the simulation of non-linear materials with lower computational times in the simulation of instantaneous field problems in the presence of high temperature superconductors (HTS). The proposed method is based on a partitioned finite element method (FEM) using an E-H electromagnetic scheme formulation (FEM-EHS). The novelty of this method resides in the separation of the matrix formulation due to the discretization of Ampèrés and Faradaýs laws, leaving outside the matrix equations of the non-linear magnetic and electric material properties. Therefore, for a time-dependent simulation, the transformation matrices related to the Ampèrés and Faradaýs laws remain unchanged for the entire time domain, not dependent on the non-linear local Ohḿs law E(J) of the HTS model. Therefore, those matrices can be computed and inverted a priori leading to a fast computation. The method was validated by comparing results with a commercial FEA tool, for the simulation of an HTS bulk magnetization process. With the proposed method, results were obtained in less than 1/3 of the computational time of the commercial tool.

Autores da comunidade :

• 

  J

  João Filipe Pereira Fernandes

  ist158045

  Afiliações e fontes

  IST > LAETA

  Laboratório Associado de Energia, Transportes e Aeronáutica

  IST > DEEC

  Departamento de Engenharia Electrotécnica e de Computadores

  IST > IDMEC > CSI

  Centro de Sistemas Inteligentes

  IST > IDMEC

  Instituto de Engenharia Mecânica

  De: orcid

  ID: 53030727

  De: scopus

  ID: 2-s2.0-85056661602

• 

  V

  Vítor Manuel de Oliveira Maló Machado

  ist11908

  Afiliações e fontes

  IST > DEEC

  Departamento de Engenharia Electrotécnica e de Computadores

  IST > IT

  Instituto de Telecomunicações

Journal of Magnetism and Magnetic Materials

448

455

474

15

0304-8853

10.1016/j.jmmm.2018.11.068

electrical-engineering-electronic-engineering-information-engineering - Engenharia Eletrotécnica, Eletrónica e Informática

eng - Inglês