LAUSR

Abstract Electromagnetic pulse (EMP) technology is an emerging non-conventional technology that relies on the usage of electromagnetic force to deform a workpiece at high speed. Recently, studies on the application of EMP technology have been underway, and identifying the characteristics of an EMP system, that is, the system circuit parameters (resistance, inductance, and capacitance), is necessary to understand the effect of resonance circuit configuration on the performance and to design the coil. An EMP equipment commonly consists of a power supply and capacitor bank for charging and discharging high voltages, and it is connected to a conductive coil actuator. The capacitor bank, wires, and connectors are collectively referred to as the EMP system, and the system circuit parameters are represented by only the capacitance, but the internal resistance and inductance caused by the wire and connectors are also included. Although the two types of practical methods for identifying the system circuit parameters were developed in our previous work, only limited verifications with flat spiral coil were performed. This study provides the prediction of the equivalent electric-current profile, based on the identified system circuit parameters, flowing in the resonance circuit connected with two types of helix coil actuators. As a result, it is verified whether the identified system circuit parameters work uniquely when the type of coil actuator changes.