Performance Evaluation and Comparison of Three-Phase and Six-Phase Winding in Ultrahigh-Speed Machine for High-Power Application
Performance Evaluation and Comparison of Three-Phase and Six-Phase Winding in Ultrahigh-Speed Machine for High-Power Application
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DOI：
10.1109/tie.2022.3187587
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发表时间：
2023-05
影响因子：
7.7
通讯作者：
Md Nazmul Islam;K. Tasnim;Seung-duck Choi;S. Kwak;Yang Hong
中科院分区：
文献类型：
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作者：
Md Nazmul Islam;K. Tasnim;Seung-duck Choi;S. Kwak;Yang Hong
研究了500kr/min大功率超高速电机多相绕组拓扑结构对电机性能的影响。在这一速度水平下，增加转子的磁载荷会激发其临界弯曲共振，并导致结构故障。另一方面，利用三相绕组增加定子的电负荷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之间的电磁干扰。因此，UHSM的最大输出功率水平(500 kr/min或更高)仅限于最先进的几百瓦。为了克服这一关键缺陷，本文提出了一种新的设计方法，通过限制最大纵横比(L/D)来限制转子的弯曲共振和离心应力，并在无槽定子中采用优化的多相绕组，通过有效的电力负载来提高功率水平。此外，还利用多物理优化来获得最优的磁载荷和电载荷，其中弯曲共振和其他系统极限是使用多学科设计约束来定义的。观察到，多相绕组增加了自由度，在不激发转子弯曲共振和结构故障的情况下提高了超高速电机的功率水平。利用所提出的方法，为安全关键的阿米巴系统设计了多相2kW 500kr/min高压超高速电机，并将其多物理性能与同等体积的三相电机进行了比较。最后，在两个原型上进行了大量的实验，验证了所提方法的有效性。结果表明，多相HP-UHSM在500kr/min以下无临界弯曲谐振，输出功率比三相设计提高16.3%，效率提高1.18%，反电势降低28.6%。
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.