Design and stress analysis of in-vessel saddle coils for MHD control in ASDEX Upgrade
Design and stress analysis of in-vessel saddle coils for MHD control in ASDEX Upgrade
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DOI：
10.1016/j.fusengdes.2008.12.014
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发表时间：
2009-06
期刊：
影响因子：
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通讯作者：
T. Vierle;B. Streibl;M. Rott;U. Seidel;A. Herrmann;O. Neubauer;W. Suttrop
中科院分区：
文献类型：
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作者：
T. Vierle;B. Streibl;M. Rott;U. Seidel;A. Herrmann;O. Neubauer;W. Suttrop
介绍了ASDEX升级中用于MHD控制的一套船内鞍形线圈。选择传统的线圈设计，其采用具有嵌入环氧树脂中的中央冷却孔的五匝方形横截面铜导体。绕组被封闭在一个固体金属外壳中，该外壳由一个薄的深拉铬镍铁合金板制成，以最大限度地提高电阻并最小化L/R和磁场屏蔽。线圈外壳中由于安装而产生的弯曲应力通过垂直于电流方向的加强肋而减小。通过在壳体上施加由安装螺栓施加的预应力来避免疲劳应力。有限元应力计算进行验证的设计。套管和导体中热膨胀引起的二次应力可以很好地耐受。线圈设计的结构刚度提供了高谐振频率，高于工作频率范围f= DC. 1.2kHz。
A set of in-vessel saddle coils for MHD control in ASDEX Upgrade is described. A conventional coil design is chosen which employs a five turn square cross-section copper conductor with central cooling bore embedded in an epoxy resin. The winding is enclosed in a solid metal casing, made of a thin deep-drawn inconel sheet in order to maximise the electrical resistance and minimise L/R and shielding of the magnetic field. The bending stress in the coil casing due to the mount is reduced by reinforcing ribs perpendicular to the current direction. Fatigue stresses are avoided by application of a pre-stress on the casing exerted by the mounting bolts. Finite element stress calculations are performed to verify the design. Secondary stresses induced by thermal expansion in the casing and the conductor are well tolerable. The structural stiffness of the coil design provides a high resonance frequency, above the operation frequency range f=DC…1.2kHz.