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Modeling of history‐dependent magnetization in the finite element method on the example of a postassembly rotor magnetizer
Author(s) -
Bavendiek Gregor,
Müller Fabian,
Steentjes Simon,
Hameyer Kay
Publication year - 2019
Publication title -
international journal of numerical modelling: electronic networks, devices and fields
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.249
H-Index - 30
eISSN - 1099-1204
pISSN - 0894-3370
DOI - 10.1002/jnm.2674
Subject(s) - magnet , finite element method , demagnetizing field , rotor (electric) , mechanical engineering , actuator , magnetization , magnetic field , materials science , engineering , computer science , physics , electrical engineering , structural engineering , quantum mechanics
Demagnetization characteristics of permanent magnets play a central role for the design and optimization process of permanent magnet electrical machines and magnetic actuators. Currently, practical issues, such as loss of performance of electromagnetic energy conversion devices, due to demagnetization effects in permanent magnets or due to reduced servo‐dynamics in magnetic actuators, cannot be addressed by using conventional material models or are investigated by using rough approximations valid in restricted operation regions, if at all. This paper strives to integrate demagnetizing characteristics dependent on previous magnetizing field strength in the finite element method. The discussed examples are a magnetizer of a single permanent magnet and a spoke‐type permanent magnet rotor.