Analysis of axial field magnetic gears with Halbach arrays
Analysis of axial field magnetic gears with Halbach arrays
复制标题
Halbach 阵列轴向磁场磁齿轮分析
DOI：
10.1109/iemdc.2015.7409045
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
H. Toliyat
中科院分区：
文献类型：
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作者：
Matthew Johnson;M. Gardner;H. Toliyat
磁性齿轮可以缩放旋转系统的扭矩和速度，同时避免与通过物理接触传递扭矩相关的问题。这项工作使用三维有限元分析参数化表征的性能优势，可以从应用Halbach磁体阵列轴向磁场磁齿轮。据发现，海尔贝克阵列降低磁通密度在相邻的背铁，允许这些轭的厚度被减少。而且，使用Halbach阵列增加了气隙中的期望磁通量空间频率的大小，从而增加了扭矩，并且减小了不期望的空间频率的大小，从而减小了扭矩涟漪。此外，在两个转子上使用Halbach阵列将两个不同设计点的扭矩体积扭矩密度分别增加了43.6%和65.7%，达到183.9和155.8 kN*m/m3，并降低了两个转子上的齿槽扭矩。
Magnetic gears can scale the torque and speed of rotary systems, while avoiding problems associated with transferring torque through physical contact. This work uses 3D finite element analysis to parametrically characterize the performance benefits which can be obtained from applying Halbach magnet arrays to axial field magnetic gears. It is found that Halbach arrays decrease the flux density in the adjacent back iron, allowing the thickness of these yokes to be reduced. Also, using Halbach arrays increases the magnitude of the desired magnetic flux spatial frequencies in the air gaps, increasing torque, and decreases the magnitude of undesired spatial frequencies, decreasing torque ripple. Additionally, the use of Halbach arrays on both rotors increased the torque volumetric torque density for two different design points by 43.6% and 65.7% to 183.9 and 155.8 kN*m/m3, respectively, and decreased the cogging torque on both rotors.