摘要
对线圈炮路方法——电流丝法进行了修改,通过对激励线圈进行剖分提高了等效网络中的互感计算精度,使电流丝法能够更准确地分析线圈炮的性能。为了验证修改后电流丝法的有效性并对线圈炮的电磁暂态进行研究,将电流丝模型计算得到的激励线圈电流加载到对应的场模型中,实现对线圈炮的场路结合分析。线圈炮的场模型基于三维组合网格法建立,组合网格法使用2套网格分别离散静止和运动区域,2套网格之间没有拓扑约束从而克服了常规有限元法在处理运动导体涡流场问题时需要重剖分的麻烦。通过电流丝法改进前后场路结合法计算结果的对比可知,对激励线圈进行剖分可以提高场分析和路分析结果的一致性。提出的场路结合法使感应线圈炮的精细化分析成为可能。
This paper improved current filament method （CFM） which is commonly used in coil gun’s circuit simulation.In the modified CFM,each excitation coil was divided into small sub-coils to improve calculation precision of inductance in equivalent electric network.In order to check the effect of the modification and analyze electromagnetic transient in coil gun launch,the field-circuit method for induction coil gun was introduced.The field model is built based on 3D composite grid method （CGM）,CGM uses two sets of mutual independent grids to discretize solution region,the coarse grids discretize the global region and the fine grids discretize the moving part.In every time step,instead of remeshing it is only necessary to change the coordinates of nodes in fine girds.A three-stage coil gun’s field-circuit model was built,by comparing the results of field-circuit model before and after the improvement of CFM,the validity of modification is proved.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2010年第30期128-134,共7页
Proceedings of the CSEE
关键词
感应线圈炮
电流丝法
组合网格法
场路结合
运动导体涡流场
induction coil gun
current filament method
composite grid method
field-circuit
moving conductor eddy current
