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在磁绝缘传输线层流模型基础上,基于极限电流近似,推导获得了同轴圆柱形磁绝缘传输线在自磁限制绝缘时,前沿损失电子电流、功率的解析解.通过粒子模拟,获得了磁绝缘传输线在源阻抗不变的条件下,不同电压条件下的损失电子电流、损失功率.对比分析了模拟结果与极限电流近似下和最小电流近似下的理论结果.结果表明:损失电子电流与损失功率比例随电压增大而减小;电压高于4MV时,极限电流近似更符合模拟结果,电压大于10MV时,极限电流近似与模拟结果的相对误差从最小电流近似的50%以上减小到10%以下.对于建立磁绝缘传输线系统中,高压电脉冲从真空传输、磁绝缘传输线上传输到工作负载的全电路模拟具有一定的指导意义.
Based on the laminar flow model of the magnetically insulated transmission line, based on the limit current approximation, an analytical solution for the loss of the electron current and power at the leading edge of the coaxial cylindrical magnetically insulated transmission line is obtained. By means of particle simulation, the magnetic insulation The transmission line under the condition of the same source impedance, the loss of electronic current and the loss of power under different voltage conditions, and the theoretical results under the approximation of the limit current and the minimum current are compared and analyzed.The results show that the loss of electron current and loss of power When the voltage is higher than 4MV, the limit current is more in line with the simulation result. When the voltage is more than 10MV, the relative error between the limit current approximation and the simulation result decreases from above 50% of the minimum current to 10% The following for the establishment of magnetic insulated transmission line system, high voltage electric pulse from the vacuum transmission, magnetic insulation transmission line to the full load of the circuit simulation has some guiding significance.