不同槽极结构下无重叠转子FEFSSM的研究

M. Omar, E. Sulaiman, Md. Zarafi Ahmad, F. Khan
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摘要

凸转子磁场励磁开关同步电机(FEFSSM)具有鲁棒性和磁链控制能力,是高速条件下最可行的选择。然而,现有的FEFSSM采用重叠励磁线圈(FEC)和电枢绕组,材料成本,电机尺寸和铜损耗的增加应该克服。此外,由于转子重量凸起结构导致功率和转矩密度下降的问题也需要改进。在本研究中,将传统FEFSSM中的凸极转子和重叠绕组分别替换为分段转子和无重叠绕组结构。首先,利用二维有限元分析(FEA)对12S-3P、12S-6P、12S-9P和12S-15P四种FEFSSM拓扑结构进行了设计。然后分析了磁链、感应电压、磁链增强、磁链线及分布、允许齿槽转矩、平均转矩和最大功率等方面的性能。初步结果表明,采用分段转子和无重叠绕组的效果显著,缩短了磁通路径,减少了铜的使用量。最终,12S-6P定子转子配置成为最佳竞争对手,其磁链最高,峰值转矩为4.12 mWb,最大功率为0.77 Nm,最大功率为260 W
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Investigation of Segmented Rotor FEFSSM with Non-Overlap Windings in Various Slot-Pole Configurations
Salient rotor field excitation flux switching synchronous motor (FEFSSM) could be considered as the most feasible candidate in high speed condition owing to their robustness and flux control ability. Nevertheless, the existing FEFSSM utilizes overlapped field excitation coil (FEC) and armature windings, the material cost, motor size and rise of copper loss should be overcome. Besides, deterioration in power and torque densities due to salient structure of rotor weight needs to be improved. In this research, the salient rotor and overlapped windings in conventional FEFSSM are replaced with segmented rotor and non-overlap winding configuration, respectively. Initially, design structures of four FEFSSM topologies i.e., 12S-3P, 12S-6P, 12S-9P and 12S-15P are conducted using 2D finite element analysis (FEA). Then, performances in term of flux linkage, induced voltage, flux enhancement, flux lines and distributions, allowable cogging torque, average torque and maximum power are analyzed. Preliminary results show that the proposed FEFSSM has produced shorter flux path and less copper usage, mainly from the effect of segmental rotor and non-overlap winding. Finally, 12S-6P stator rotor configurations has been selected as the best contenders which deliver the highest flux linkages, peak torque and maximum power of 4.12 mWb, 0.77 Nm and 260 W, respectively
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