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Performance Evaluation and Comparison of Three-Phase and Six-Phase Winding in Ultrahigh-Speed Machine for High-Power Application
IEEE Transactions on Industrial Electronics ( IF 7.7 ) Pub Date : 2022-07-07 , DOI: 10.1109/tie.2022.3187587
Khurshedul Islam 1 , Kazi Nishat Tasnim 2 , Seungdeog Choi 2 , Sangshin Kwak 3 , Yang-Ki Hong 4
Affiliation  

This article investigates the influence of multiphase winding topologies in high-power ultrahigh-speed machines (HP-UHSM) of 500 kr/min. At this speed level, increasing the rotor's magnetic loading excites its critical bending resonances and leads to structural breakdown. On the other hand, increasing the stator's electric loading using the three-phase winding increases unwanted vibrations in a slotted stator and reduces the electromagnetic interaction of the stator and rotor in a slotless stator. Consequently, the maximum output power level of UHSM (500 kr/min or more) is limited to a few hundred watts only in the state-of-the-art. To over-come such a critical limitation, this article proposes a new design methodology for HP-UHSM, where the rotor's bending resonances and centrifugal stresses are restricted by limiting the maximum aspect ratio ( L/D ), and an optimal multiphase winding is adopted in the slotless stator to increase the power level by effective electric loading. Also, a multiphysics optimization is utilized to obtain the optimum magnetic loading and electric loading, where the bending resonance and other system limits are defined using multidisciplinary design constraints. It is observed that the multiphase winding provides an added degree of freedom to increase the power level of UHSM without exciting the rotor's bending resonances and structural breakdown. Using the proposed method, a multiphase 2 kW 500 kr/min HP-UHSM has been designed for the safety-critical AMEBA system and compared its multiphysics performance with the three-phase machine having the same volume. Finally, extensive experiments are performed on both prototypes to validate the effectiveness of the proposed method. It is shown that the multiphase HP-UHSM has no critical bending resonance below the 500 kr/min, and it has 16.3% higher output power with 1.18% higher efficiency and 28.6% lower back-EMF than the three-phase design.

中文翻译:

大功率应用超高速电机中三相和六相绕组的性能评估与比较

本文研究了多相绕组拓扑结构对 500 kr/min 大功率超高速电机 (HP-UHSM) 的影响。在此速度水平下,增加转子的磁负载会激发其临界弯曲共振并导致结构损坏。另一方面,使用三相绕组增加定子的电负载会增加有槽定子中不需要的振动,并减少无槽定子中定子和转子的电磁相互作用。因此,UHSM 的最大输出功率水平(500 kr/min 或更高)在最先进的技术中仅限于几百瓦。为了克服这样一个关键限制,本文提出了一种新的 HP-UHSM 设计方法,其中转子' L/D ),无槽定子采用优化的多相绕组,通过有效的电负载提高功率水平。此外,还利用多物理场优化来获得最佳磁负载和电负载,其中弯曲共振和其他系统限制是使用多学科设计约束定义的。据观察,多相绕组提供了额外的自由度来增加 UHSM 的功率水平,而不会激发转子的弯曲共振和结构故障。使用所提出的方法,为安全关键 AMEBA 系统设计了多相 2 kW 500 kr/min HP-UHSM,并将其多物理场性能与具有相同体积的三相电机进行了比较。最后,对两个原型进行了大量实验,以验证所提出方法的有效性。结果表明,多相 HP-UHSM 在 500 kr/min 以下没有临界弯曲共振,输出功率比三相设计高 16.3%,效率高 1.18%,反电动势低 28.6%。
更新日期:2022-07-07
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