In this paper,the authors derive the existence criteria and the formulae of the weighted Moore-Penrose inverse,the e-core inverse and the f-dual core inverse in rings.Also,new characterizations between weighted Moore-...In this paper,the authors derive the existence criteria and the formulae of the weighted Moore-Penrose inverse,the e-core inverse and the f-dual core inverse in rings.Also,new characterizations between weighted Moore-Penrose inverses and one-sided inverses along an element are given.展开更多
This paper put forward a new fault-tolerant hybrid switched-flux PM(HSFPM)machine design employing the synergy of NdFeB and Ferrite Magnet.The key of the proposed HSFPM designed machine is the unique design E-core lam...This paper put forward a new fault-tolerant hybrid switched-flux PM(HSFPM)machine design employing the synergy of NdFeB and Ferrite Magnet.The key of the proposed HSFPM designed machine is the unique design E-core laminated stator with the hybrid magnet to ensure a drastic reduction of NdFeB magnet without compromising the output performances and efficiency in the conventional SFPM machine design to avert the huge demand of NdFeB and its associated volatile high price increase.Additionally,the fault-tolerant stator teeth designed principle implemented in the proposed HSFPM machine provides enhanced segregation among the various phases and ensures continuity of operation with acceptable operating performance under fault-condition.For fair evaluation and comparison,both the proposed HSFPM and the conventional SFPM(CSFPM)machine have the same slot-pole combination,winding arrangements,and stator/rotor dimensions except for the unique outer-stator of the proposed design.Meanwhile,compared to the CSFPM machine,the proposed HSFPM machine design makes use of only 60%of the PM(NdFeB)length.Finally,the evaluation of the no-load in conjunction with the load condition performances was carefully investigated by the Finite Element Method(FEM)of the ANSYS Maxwell software.The results depicted that the proposed HSFPM exhibits similar sinusoidal back electromotive force,comparable output torque,and slightly higher efficiency compared to that of the CSFPM machine.展开更多
以10 k W·h飞轮储能系统的电磁轴承为对象,分析了E型12极径向电磁轴承的动态载荷特性。通过电磁轴承动态载荷区图,建立了转子不平衡激励载荷与动态载荷区的联系,以提高最大承载能力为目标,合理匹配了电磁轴承磁铁与功率放大器组合...以10 k W·h飞轮储能系统的电磁轴承为对象,分析了E型12极径向电磁轴承的动态载荷特性。通过电磁轴承动态载荷区图,建立了转子不平衡激励载荷与动态载荷区的联系,以提高最大承载能力为目标,合理匹配了电磁轴承磁铁与功率放大器组合。确定了执行器的主要技术参数和转子动平衡精度等级,为磁悬浮储能飞轮系统总体设计、电磁轴承系统设计提供了设计方法和理论依据。展开更多
基金supported by the National Natural Science Foundation of China(Nos.11971294,11801124)China Postdoctoral Science Foundation(No.2020M671068)the Natural Science Foundation of Anhui Province(No.1808085QA16)。
文摘In this paper,the authors derive the existence criteria and the formulae of the weighted Moore-Penrose inverse,the e-core inverse and the f-dual core inverse in rings.Also,new characterizations between weighted Moore-Penrose inverses and one-sided inverses along an element are given.
基金This work was supported in part by the National Natural Science Foundation of China(51707083)the Priority Academic Program Development of Jiangsu Higher Education Institutions.
文摘This paper put forward a new fault-tolerant hybrid switched-flux PM(HSFPM)machine design employing the synergy of NdFeB and Ferrite Magnet.The key of the proposed HSFPM designed machine is the unique design E-core laminated stator with the hybrid magnet to ensure a drastic reduction of NdFeB magnet without compromising the output performances and efficiency in the conventional SFPM machine design to avert the huge demand of NdFeB and its associated volatile high price increase.Additionally,the fault-tolerant stator teeth designed principle implemented in the proposed HSFPM machine provides enhanced segregation among the various phases and ensures continuity of operation with acceptable operating performance under fault-condition.For fair evaluation and comparison,both the proposed HSFPM and the conventional SFPM(CSFPM)machine have the same slot-pole combination,winding arrangements,and stator/rotor dimensions except for the unique outer-stator of the proposed design.Meanwhile,compared to the CSFPM machine,the proposed HSFPM machine design makes use of only 60%of the PM(NdFeB)length.Finally,the evaluation of the no-load in conjunction with the load condition performances was carefully investigated by the Finite Element Method(FEM)of the ANSYS Maxwell software.The results depicted that the proposed HSFPM exhibits similar sinusoidal back electromotive force,comparable output torque,and slightly higher efficiency compared to that of the CSFPM machine.
文摘以10 k W·h飞轮储能系统的电磁轴承为对象,分析了E型12极径向电磁轴承的动态载荷特性。通过电磁轴承动态载荷区图,建立了转子不平衡激励载荷与动态载荷区的联系,以提高最大承载能力为目标,合理匹配了电磁轴承磁铁与功率放大器组合。确定了执行器的主要技术参数和转子动平衡精度等级,为磁悬浮储能飞轮系统总体设计、电磁轴承系统设计提供了设计方法和理论依据。
