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Magnetic moments of ^(33)Mg in the time-odd relativistic mean field approach 被引量:9
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作者 LI Jian1,ZHANG Ying1,YAO JiangMing1 & MENG Jie1,2 1 School of Physics,State Key Laboratory of Nuclear Physics and Technology,Peking University,Beijing 100871,China 2 School of Physics and Nuclear Energy Engineering,Beihang University,Beijing 100191,China 《Science China(Physics,Mechanics & Astronomy)》 SCIE EI CAS 2009年第10期1586-1592,共7页
The configuration-fixed deformation constrained relativistic mean field approach with time-odd component has been applied to investigate the ground state properties of 33Mg with effective interaction PK1.The ground st... The configuration-fixed deformation constrained relativistic mean field approach with time-odd component has been applied to investigate the ground state properties of 33Mg with effective interaction PK1.The ground state of 33Mg has been found to be prolate deformed,β2=0.23,with the odd neutron in 1/2[330] orbital and the energy -251.85 MeV which is close to the data -252.06 MeV.The magnetic moment -0.9134 μN is obtained with the effective electromagnetic current which well reproduces the data -0.7456 μN self-consistently without introducing any parameter.The energy splittings of time reversal conjugate states,the neutron current,the energy contribution from the nuclear magnetic potential,and the effect of core polarization are discussed in detail. 展开更多
关键词 magnetic MOMENT BINDING energy time-odd component configuration-fixed deformation CONSTRAINED calculation RELATIVISTIC mean field theory
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基于奇/偶互补磁场理论的自起动永磁同步电机两种运行状态研究
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作者 阚超豪 赵如鹏 余银钢 《中国电机工程学报》 EI CSCD 北大核心 2023年第17期6862-6873,共12页
基于奇/偶互补磁场理论的新型自起动永磁同步电机(line-start permanent magnet synchronous motor,LSPMSM)根据定子绕组两种联结方式,可分为不同的运行状态。定子仅主绕组接入电网时,电机处于“互补磁场”状态,此时转子同位线圈电阻的... 基于奇/偶互补磁场理论的新型自起动永磁同步电机(line-start permanent magnet synchronous motor,LSPMSM)根据定子绕组两种联结方式,可分为不同的运行状态。定子仅主绕组接入电网时,电机处于“互补磁场”状态,此时转子同位线圈电阻的折算值增大,电抗折算值不变,进而在起动初期缩小电机冲击电流的同时,增大起动转矩。定子主绕组与次绕组同时供电时,电机处于常规状态,此时定子绕组电磁性能等效于正规60°相带设计,稳态运行时性能与普通LSPMSM相同。该文分别对新型电机两种运行状态下的工作原理、等效电路和转矩–转速曲线进行分析。建立有限元仿真模型,对样机两种运行状态的堵转性能、起动性能进行研究,并分别研究样机在空载、重载起动条件下的切换过程。样机试验与仿真结果表明,轻载时在牵入同步速度附近切换运行状态,重载时在0.6倍额定转速前切换运行状态,新型电机能够兼顾高起动性能与高稳态性能。 展开更多
关键词 自起动永磁同步电机 奇/偶互补磁场 堵转特性 切换过程 稳态运行特性
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基于奇/偶互补磁场理论的新型自起动永磁同步电机 被引量:2
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作者 阚超豪 赵如鹏 +2 位作者 张贺 任泰安 王群京 《中国电机工程学报》 EI CSCD 北大核心 2022年第19期7213-7223,共11页
自起动永磁同步电机在起动时存在电流大、转矩小、永磁体易退磁等不足,制约着该电机在重载起动等领域的工业化应用。该文提出一种奇/偶互补磁场理论,依据奇/偶对极磁场中每相转子绕组的各支路感应电势相位,对转子绕组进行串并联组合,使... 自起动永磁同步电机在起动时存在电流大、转矩小、永磁体易退磁等不足,制约着该电机在重载起动等领域的工业化应用。该文提出一种奇/偶互补磁场理论,依据奇/偶对极磁场中每相转子绕组的各支路感应电势相位,对转子绕组进行串并联组合,使转子在奇/偶对极磁场中感应电流具有不同的流通路径,进而起动时转子绕组等效匝数降低,转子电阻折算值增大,达到提高样机起动性能的目标。通过对奇/偶互补磁场理论与同位线圈工作原理的分析,推导出样机起动状态等效电路,建立二维瞬态有限元模型。分析堵转时转矩与电流、空载起动气隙磁密、发电机制动转矩及永磁体退磁规律,结果表明,该理论既提高了样机起动转矩、减小了起动电流,进而削弱起动电流对永磁体的冲击,又保证了电机稳态运行性能与同机座号常规永磁电机相同,具有显著的应用价值。 展开更多
关键词 奇/偶互补磁场理论 自起动永磁同步电机 起动转矩 起动电流 永磁体退磁
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Deformation constrained relativistic mean-field approach with fixed configuration and time-odd component 被引量:5
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作者 李剑 尧江明 孟杰 《Chinese Physics C》 SCIE CAS CSCD 2009年第S1期98-100,共3页
Deformation constrained relativistic mean-field (RMF) approach with fixed configuration and timeodd component has been developed and applied to investigate magnetic moments of light nuclei near doublyclosed shells. Ta... Deformation constrained relativistic mean-field (RMF) approach with fixed configuration and timeodd component has been developed and applied to investigate magnetic moments of light nuclei near doublyclosed shells. Taking 17O as an example, the results and discussion are given in detail. 展开更多
关键词 relativistic mean field theory deformation constrained configuration-fixed time-odd potential magnetic moment
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