涡流损耗

Finish the studies of most backset conditions and monitoring ways of anti-magnetic-drive and put forward the computation formula of backset wasting of metal materials

完成了遏制磁驱动最大涡流条件和检测方法的研究，提出了金属材料涡流损耗计算公式

This effect caused by the whirling fluid and magneticscreening of the cryostat tubes, and it can't be corrected completely. To avoid thisharmfulness, the detection coil of VSM is put into the cryostat.

通过分析发现，这是由于恒温器不锈钢壁层中的涡流损耗和磁屏蔽造成的，而这种影响的完全补偿几乎是不可能的。

In chapter 5, the dynamic vertical end effect of linear motor is analyzed, which causes eddy current loss and air gap flux decrease.

第五章针对直线电机特有的边缘效应，分析了动态纵向边缘效应的影响，它产生端部涡流损耗，减小气隙磁场。

Shielding must be a set of materials with good mechanical properties and corrosion resistance of the non-magnetic material, in order to reduce the eddy current loss coefficient of resistance to a large selection of materials.

屏蔽套材料必须是具有良好的机械性能和抗腐蚀性能的非导磁材料，为了减小涡流损耗要选用电阻系数大的材料。

Fig.6 Percentage of the eddy current loss vs. frequency

磁密增大时涡流损耗在总损耗中所占的比率也是在增大。

This is the sum of the hysteresis loss factor, eddy current loss factor and residual loss factor.

式中 tan 〥 h 为磁滞损耗因数， tan 〥 e 为涡流损耗因数， tan 〥 r 为剩余损耗因数

Analytical results indicate that AC magnetic field should be below the penetration magnetic field of superconducting tape and frequency of magnetic field should be low (200Hz)enough in order to reduce the influence of eddy current loss in metal matrix and coupling loss among superconducting filaments and the matrix.

在测量过程中交变磁场必须低于带材穿透磁场；磁场需要保持在低频（200Hz以下）以减少基材的涡流损耗和超导芯间的耦合损耗对测量损耗电压的影响。

By the deep analysis on winding eddy current loss mechanism of the transformer in forward-flyback converter, a new idea is proposed that the magnetic field in winding window of the transformer can be considered as the combination of the two components, that is, transformer field component and inductor field component. The orthogonal characteristics of the two magnetic field components in CCM are further revealed.

通过深入研究正反激变换器中的变压器线圈涡流损耗机制，指出其线圈窗口磁场可分离为变压器特性的磁场和电感器特性的磁场，证明了连续导通模式时上述两种特性磁场为正交的，进而提出一新型线圈损耗解析建模方法，新方法可以有效提高模型精度。

Winding narrow single wire cross section, a few more wires parallel using composite wires, the eddy current loss and reduce the total loss, and enhance the ability to short-circuit resistance, good thermal stability of moving.

绕组缩小单根导线截面，增加导线并联更数，采用复合导线，经降低涡流损耗和总损耗，并增强抗短路能力，动热稳定性好。

High strength: Aluminum-magnesium-silicon alloy wire possesses high strength, its min value of tensile strength is 170% of the value of general hard and round aluminum wire(H8), is a fine armored material;②Low loss:as a non-magnetism material, no eddy current loss will happened on aluminum-magnesium-silicon alloy wire; when under 20℃, itsunit resistance corresponding to 52.3~53.0%IACS (international annealed copper wire standard), so that, the heat loss caused by induced current is very low;③Light weight: the density of aluminum-magnesium-silicon is only 2.7g/cm3 it largely reduced the total weight of armored cable.

该电缆突出的优点是：①高强度：铝-镁-硅合金丝具有较高的强度，其抗拉强度的最小值都是普通硬圆铝线（H8）抗拉强度的170%，是一种较好的铠装材料；②损耗小：铝-镁-硅合金丝为非磁性材料，不存在涡流损耗；其在20℃时的电阻率相52.5~53.0%IACS，因此由感应电流产生的热损耗很小；③重量轻：铝-镁-硅合金丝的密度仅为2.7g/cm3，明显降低了铠装电缆的整体重量。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。