A simple method of measuring impulse current ofsmall high-voltage exploding device

A simple method was developed for measuring the impulse current waveform produce by a small high-voltage exploding device. The model of impulse current was determined by attenuation coefficient. To estimate the attenuation coefficient from the actual discharge voltage curve, the Levenberg-Marquarat algorithm was applied based on the equivalent circuit of discharge circuit and its differential equations. Compared with the direct measuring methods such as using shunt or Rogowski coil, this method overcomes the distortion of impulse current waveform caused by additional measuring circuit. The results show that the simulation current waveform fits the actual current waveform well. The method can be used for optimum matching design of electronic safety, arming device of in-line fuse or low-energy slapper detonator.