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如何实现变频调速,如何才能正确的运用变频调速电动机以及变频器和电机如何配套才能使变频调速电机发挥其优势,文章就此问题进行了分析,并提出了可行方案。 相似文献
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The 13C(7Li, 6He) 14N reaction is measured at E(7Li) = 34 MeV with the Q3D magnetic spectrometer of HI-13 tandem accelerator. Angular distributions at forward angles for proton transfer to the ground and the first excited states in 14N are obtained. In addition, angular distribution for 7Li + 13 C elastic scattering is also measured. The optical potential parameters for the entrance and exit channels of the transfer reactions are derived by fitting the 7Li + 13C and 6Li + 14N elastic scattering experimental data, and their angular distributions are well reproduced by the distorted wave Born approximation calculations. A phase shift of about 2 between the calculations and the experiment data has been found in the earlier (7Li, 6He) study, whereas no such phase shift is observed in the present work. 相似文献
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郭冰 李志宏 李云居 苏俊 白希祥 陈永寿 樊启文 金孙均 李二涛 李志常 连钢 刘鑫 刘建成 舒能川 王宝祥 王友宝 颜胜权 曾晟 柳卫平 庞丹阳 M. LUGARO J. BUNTAIN 《等离子体科学和技术》2012,(5):357-359
The 13C(α,n)16O reaction is believed to be the main neutron source reaction for the s-process in asymptotic giant branch (AGB) stars. The astrophysical S-factors of this reaction have been determined based on an evaluation of the α spectroscopic factor of the 1/2+ subthreshold state in 17O (Ex=6.356 MeV) by using the 13C(11B,7Li)17O α transfer reaction. Our result confirms that the 1/2+ subthreshold resonance is dominant for the 13C(α,n)16O reaction at low energies of astrophysical interest. 相似文献
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根据大型煤矿井下通风用对旋轴流风机负载特点,对与之配套使用的电动机的轴承进行受力分析,同时分析风机对电机轴承所产生的不利因数,研究新的轴承结构,与传统的轴承结构进行分析对比,说明新轴承结构的优点。 相似文献
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吴志丹 郭冰 李志宏 李云居 苏俊 庞丹阳 颜胜权 李二涛 白希祥 杜先超 樊启文 甘林 何建军 金孙均 景龙 李龙 李志常 连钢 刘建成 谌阳平 王友宝 于祥庆 曾晟 张立勇 张伟杰 柳卫平 《核技术》2014,(10):65-70
用Q3D磁谱仪测量了15N(7Li,6Li)16N布居16N基态和前三个激发态的角分布。通过对实验数据的扭曲波玻恩近似(Distorted wave Born approximation,DWBA)分析,导出这些态的谱因子和渐进归一化系数(Asymptotic normalization coefficient,ANC),进而用新的谱因子得到15N(n,γ)16N的天体物理反应率。结果表明,尽管15N为中子满壳核,但16N中转移中子处于2s1/2轨道的两个能级并不是很好的单粒子能级,与壳模型的理论预言结论相反。 相似文献