一种新的电磁轨道炮电感梯度计算方法

A New Method for Calculating the Inductance Gradient of Railgun

针对现有文献对速度趋肤效应影响下的电磁轨道炮电感梯度研究不足的问题,从毕奥-萨伐尔定律出发,提出一种新的电感梯度计算方法。指出文献给出的4种电感梯度计算方法的缺点与不足,将轨道中电流假设为均匀分布于轨道的内表面及上、下表面,采用文中方法与文献给出4种计算方法对电感梯度进行分析,并将其计算值与ANSYS仿真及实验得到的电感梯度值进行对比。结果表明:该方法与文献给出4种计算方法所得计算值的变化趋势较为一致,但方法得到的电感梯度值较为接近,具有形式简单、计算准确的优点。

In view of the limitations of studying on railgun inductance gradient under the influenced by the velocity skin effect, this paper proposed a new method to calculate inductance gradient of railgun based on the Biot-Savart law. Disadvantages and shortcomings of four calculation methods presented in other papers were pointed out, and this paper assumed that current was on the inner, upper and lower surfaces of rails uniformly, then analyzed inductance gradient with new method and other four methods respectively, and compared the calculated values of them with the ones obtained from ANSYS and experiments. The results show that, the change trend of calculated values of the new method and other four methods is relatively consistent, and calculated values of the new method are closer to the real ones so that the new method has the advantages of simpleness and accuracy.