Switched flux hybrid magnet memory machine
Switched flux hybrid magnet memory machine
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DOI：
10.1049/iet-epa.2014.0215
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发表时间：
2015-02
影响因子：
1.7
通讯作者：
Di Wu;X. Liu;Z. Zhu;A. Pride;R. Deodhar;Toshinori Sasaki
中科院分区：
文献类型：
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作者：
Di Wu;X. Liu;Z. Zhu;A. Pride;R. Deodhar;Toshinori Sasaki
本文提出了一种新型的切换磁通永磁电机（SFPMM），该电机采用普通NdFeB和低矫顽力（LCF）磁体。在传统的SFPMM之外，LCF磁体安装在每个U形定子叠片段的背面，具有平行的磁化方向和交替的极性。一个叠片环磁轭被放置在所有的LCF磁体周围，而额外的磁化线圈缠绕在每个磁体上。通过将不同方向的电流脉冲注入磁化线圈，LCF磁体的极性可以被重写，以增强或减弱由普通NdFeB磁体产生的磁场。因此，反电动势和转矩能力可以在很宽的范围内调节。本文首先介绍了该机床的工作原理和机床拓扑结构。然后，定/转子极组合和设计考虑的机器进行了讨论。借助二维有限元软件，以6/5定转子磁极电机为例进行了全局优化，以显示电机的开路磁场和反电动势、dq轴电感、转矩能力和磁化强度等性能。最后，一个原型具有相同的尺寸已经制造和测试，以验证分析结果。
A novel switched flux permanent magnet machine (SFPMM) with both normal NdFeB and low coercive force (LCF) magnets has been developed in this paper. Outside a conventional SFPMM, the LCF magnets are mounted on the back of every U-shaped stator lamination segment with parallel magnetisation direction and alternative polarities. A lamination ring yoke is placed around all the LCF magnets, while extra magnetisation coils are wound on each of them. By injecting different directions of current pulses into the magnetisation coils, the polarities of the LCF magnets can be rewritten in order to enhance or weaken the field generated by normal NdFeB magnets. Therefore the back EMF and torque capability could be adjusted in a wide range. In this paper, the operation principle and machine topology are introduced firstly. Then the stator/rotor pole combinations and design considerations of the machine have been discussed. With the help of two-dimensional finite element software, a 6/5 stator/rotor pole machine has been globally optimised as an example to show the machine performances such as open-circuit field and back EMF, dq-axis inductances, torque capabilities and magnetisation. Finally, a prototype with the same dimensions has been manufactured and tested to validate the analysis results.