Numerical Analysis and Measurement of High In-Bore Magnetic Field of Synchronous Induction Coil Launcher

Abstract

The high in-bore magnetic field generated by synchronous induction coil launcher (SICL) was analyzed and measured. According to the current filament method, the magnetic induction intensity generated by the drive coils and each armature filament were calculated. The magnetic field distribution law of the synchronous induction coil launcher was obtained through magnetic field superposition principle. Based on the Biot-Savart law, the equation for calculating magnetic induction intensity of synchronous induction coil launcher was deduced, and the numerical calculation model of magnetic field distribution of synchronous induction coil launcher was established. The magnetic field distribution and numerical calculation model when the drive coils discharge with or without armature were carried out, and the numerical calculation results of the magnetic induction intensity when the drive coils discharge were compared with the finite element simulation results. Finally, the accuracy of the numerical calculation model was verified by comparing the one-dimensional hall probe arranged on the single-stage test platform with the simulation results.INDEX TERMS Numerical analysis, synchronous induction coil launcher(SICL), magnetic field, Biot-Savart law.