Multilayer air gap winding designs for electric machines: theory, design, and characterisation
Multilayer air gap winding designs for electric machines: theory, design, and characterisation
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DOI：
10.1049/joe.2018.8071
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发表时间：
2019-01
影响因子：
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通讯作者：
N. Borchardt;R. Kasper;J. Sauerhering;W. Heinemann;K. Foster
中科院分区：
文献类型：
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作者：
N. Borchardt;R. Kasper;J. Sauerhering;W. Heinemann;K. Foster
在这里，作者提出了一种具有多层气隙绕组的磁路设计。这种设计在设计过程中提供了新的自由度。该方法基于单层气隙绕组，其展示了扩展能力，允许在小型和大型电机中应用。具有平行于旋转轴布置的线圈的曲折结构以多层安装在无槽磁芯上。作者认为，一个固定的欧姆功率损耗边界条件比较这种方法与现有的验证机器设计。电机电流随着每层绕组的增加而减小，而自感和感应电压则增加。由于气隙高度随着每增加一层而增加，因此可用磁通量密度降低。因此，可以解析地描述获得最佳扭矩输出的可用范围。作者提供了一个单层绕组设计，实现了全球最佳的扭矩，和四层绕组设计，这给了一个16倍的相位自感增加之间的比较。额外的热模拟证明，多层设计给出了与单层设计相同的欧姆功率损耗，而没有任何热问题和热点。
Here, the authors present a magnetic circuit design with a multilayer air gap winding. This design provides a new degree of freedom in the design process. The approach is based on a single layer air gap winding, which demonstrates the ability to scale, permitting application in small and large electric machines. A meandering structure with coils arranged parallel to the rotation axis are mounted in several layers on a slotless magnetic core. The authors consider a fixed ohmic power loss boundary condition to compare this approach with an existing validated machine design. Machine current is reduced with each winding layer, while self-inductance and induced voltage are increased. Since the air gap height is increased with every additional layer, the useable magnetic flux density decreases. Accordingly, an utilisable range in which optimal torque output is obtained can be described analytically. The authors provide comparison between a single-layer winding design, which achieves the global optimum torque, and a four-layer winding design, which gives a 16-fold increase in the phase self-inductance. Additional thermal simulations prove that the multilayer design give the same ohmic power losses as the single layer design, without having any thermal issues and hot spots.