Modeling of history‐dependent magnetization in the finite element method on the example of a postassembly rotor magnetizer
Modeling of history‐dependent magnetization in the finite element method on the example of a postassembly rotor magnetizer
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DOI：
10.1002/jnm.2674
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发表时间：
2019-08
期刊：
影响因子：
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通讯作者：
Gregor Bavendiek;F. Müller;S. Steentjes;K. Hameyer
中科院分区：
文献类型：
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作者：
Gregor Bavendiek;F. Müller;S. Steentjes;K. Hameyer
永磁体的消磁特性对永磁体电机和磁致动器的设计和优化具有重要意义。目前，实际问题，如电磁能量转换装置的性能损失，由于永磁体的退磁效应或由于磁性致动器的伺服动力学降低，不能用传统的材料模型来解决，或者用在有限操作区域有效的粗略近似来研究，如果有的话。本文力求在有限元方法中整合依赖于先前磁场强度的退磁特性。所讨论的例子是单个永磁体的磁化器和辐条型永磁体转子。
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.