Numerical simulation of disk explosive magnetic generator

Based on the equivalent circuit and simplified model of disk explosive magnetic generator (DEMG), the code MDEMG was compiled with Matlab. To analyze the variation of parameters, such as current, induction, distribution of voltage, detonation pressure and magnetic pressure, and the influences of different initial currents and different shapes of disk on output characteristic of generator, the operation of 240 mm disk explosive magnetic generator was simulated with MDEMG. The results of the simulation include three conclusions as following: this type of generator can output current 40 MA on a 1.5 nH inductive load with a characteristic rise time of 3 s, which corresponds to the experiment results of Russian researcher; Output current increases with the increase of initial current, but output current has a limitation because of the quick increase of magnetic pressure; Conical disk can produce much higher power than that of flat disk. This paper can provide theoretical reference for further domestic study of DEMG.