脉冲功率电源连续发射水冷模拟负载

Water-cooling simulated resistance for continuously launching pulsed power supply

针对脉冲功率电源连续循环放电吸能需求,提出一种1.9 MA级循环脉冲功率水冷模拟负载方案。考虑水冷负载与实际电磁发射负载的相似性要求,提出4×8钢管阵列组成的电阻网络,可方便实现电源不同组合方式的放电考核;针对1.9 MA级电流产生的脉冲电磁力可能引起水冷模拟负载损坏的问题,建立水冷模拟负载三维有限元分析模型,进行电磁力计算和结构分析,保证水冷模拟负载稳定性;利用热网络法对模拟负载在循环脉冲模式下的强迫风冷却、自然冷却和去离子水冷却等方式进行了温升分析。结果表明:模拟负载采用钢管内通去离子水冷却效果最好,循环放电时温度可以恢复到初始状态,最高温度62.5℃,满足连续放电实验的需求。利用提出的方法设计一台水冷模拟负载样机并进行了连续2次1.9 MA放电研究,试验结果与理论分析吻合较好,负载结构运行稳定,从而验证了理论分析的正确性。

For the demand of continuous energy absorption of pulsed power supply, the proposal about cycle pulse power water-cooling simulated resistance with 1. 9 MA current levels was carried out. Given full consideration to the similarities between the water-cooling resistance and the actual electromagnetic emission resistance, the resistance network composed of 4 ×8 array of steel pipes was designed, which is convenient for realizing discharging assessment with different power combination. For the problem that 1. 9 MA level current can cause too large electromagnetic force, the three-dimensional finite element model of resistance was constructed. Electromagnetic force calculation and structure analysis of resistance were implemented to ensure the stability of resistance. The analysis on resistance temperature rise with the cooling ways of natural, gale and deionized water using thermal network was implemented. The results show that the way of deionized water cooling reaches the best performance. The resistance temperature can reach initial state when pulsed power supply continuously discharges, and the maximum temperature can reach 62. 5 ℃ , which can satisfy the requirement of continuous discharging. A prototype of resistance was manufactured, and was used for two times discharging with 1. 9 MA current. The experimental result demonstrates good agreement with the theoretical analysis. The resistance structure runs well, which verifies the correctness of theoretical analysis.