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.

中文翻译：

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基于后装配转子磁化器的有限元方法中与历史相关的磁化建模

永磁体的退磁特性在永磁电机和磁致动器的设计和优化过程中起着核心作用。当前，实际问题，例如由于永磁体中的去磁效应或由于磁致动器中的伺服动力学特性降低而导致的电磁能量转换装置的性能损失，无法通过使用常规材料模型来解决，也无法通过使用有效的粗略近似来研究。在受限的操作区域（如果有）。本文力图将依赖于先前磁化强度的消磁特性整合到有限元方法中。讨论的示例是单个永磁体和辐条型永磁体转子的充磁机。