场反等离子装置60 kV角向箍缩线圈绝缘结构设计

Insulation structure design of 60 kV θ-pinch coil for field-reversed plasma device

本文简要介绍场反等离子装置60 kV角向箍缩线圈绝缘在设备运行中的关键作用,结合运行工况阐述了角向箍缩线圈绝缘关键参数和制作工艺的选择过程,并对其力学性能以及绝缘性能进行测试和分析;在样件分析基础上,制作了相应的样机,并进行了性能测试。结果表明:合理优化主绝缘厚度,适当增大绝缘圆角,可减小线圈角部场强41%,使线圈使用寿命延长9倍,击穿电压高于设计电压的20%;对比ANSYS计算结果和样件测试结果发现,浸渍固化过程中选用8 MPa压力可有效增强粘接力。

In this paper,the key role of 60 kV θ-pinch coil insulation of field-reversed plasma device in equipment operation was introduced briefly.Combined with operating conditions,the selecting processes of key parameters and manufacturing process of θ-pinch coil insulation were expounded,and its mechanical properties and insulating properties were tested and analyzed.On the basis of the sample analysis,the corresponding prototype was made to test and analyze.The results show that the field strength of the coil corner can decrease by 41% through optimizing the main insulation thickness reasonably and increasing the insulation fillet properly,making the service life of coil prolong by 9 times,and the breakdown voltage is 20% higher than the design voltage.Compared the ANSYS calculating results with the sample test results,it is found that selecting 8 MPa pressure during impregnation curing can effectively enhance the adhesion.The research results provide ideas for the insulation structure design of 60 kV θ-pinch coil of field-reversed plasma device.