Design and Tests of a Four-Layer Fractional-Slot Interior Permanent-Magnet Motor
Design and Tests of a Four-Layer Fractional-Slot Interior Permanent-Magnet Motor
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DOI：
10.1109/wemdcd.2015.7194487
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发表时间：
2015-03
影响因子：
4.4
通讯作者：
N. Bianchi;L. Alberti;M. Barcaro
中科院分区：
文献类型：
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作者：
N. Bianchi;L. Alberti;M. Barcaro
本文介绍了一种具有先进性能的内嵌式永磁（IPM）电机的设计与试验。它采用分数槽（FS）不重叠线圈绕组，减少了末端绕组长度，即焦耳损耗和机器成本。因此，可以提供更高的额定电流，以便在更宽的工作区域内达到更高的转矩密度和更高的效率。转子的显著性提高了弱磁工作区的性能和容错能力。为了减小转矩脉动，必须减小由定子电流和转子各向异性引起的磁动势谐波之间的相互作用。为此，利用四层绕组较高的自由度，对绕组进行了优化，以最大限度地减少MMF谐波。然而，所谓的槽谐波不能通过重新排列绕组线圈来最小化。因此，转子的几何形状已被设计，以尽量减少这种槽谐波的影响。设计并制造了一台12槽10极IPM FS机床。实验结果证实了这一预期。
This paper deals with the design and testing of an interior permanent-magnet (IPM) machine that exhibits advanced features. It adopts fractional-slot (FS) nonoverlapped coil windings that reduces the end winding length, i.e., the Joule losses and machine cost. As a consequence, higher rated current can be supplied so that higher torque density and higher efficiency in a wide operating region can be reached. The rotor saliency increases the performance in flux-weakening operating region and the fault-tolerance capability. In order to decrease the torque ripple, it is important to minimize the interaction between the magnetomotive force (MMF) harmonics due to the stator currents and the rotor anisotropy. To do that, the winding has been optimized so as to minimize the MMF harmonics, taking advantage from the higher degree of freedom of the four-layer winding. However, the so-called slot-harmonics cannot be minimized by rearranging the winding coils. Hence, the rotor geometry has been designed so as to minimize the impact of such slot-harmonics. A 12-slot 10-pole IPM FS machine has been designed and manufactured. The experimental tests confirm the expectations.