Influence of Drive Coils on Projectile Velocity of Reconnection Electromagnetic Launcher

As the power device of the reconnection electromagnetic launcher (REML), the drive coil structure and parameters have a great influence on the reconnection electromagnetic launch device. This article simulates and analyzes the impact of two different sizes of traditional single-layer coil on REML. The smaller the coil, the smaller the impact on the acceleration force of the projectile’s trailing edge. A larger coil will cause the eddy current in the center of the projectile to generate multiple small eddy centers, and the ohmic loss will increase. Therefore, three nested driving coil structures are innovatively proposed. In simulations, nested drive coils gave better results than traditional single-layer coil. The final speed of the projectile is increased from 22.21 to 65, 58, and 70 m/s. A nested coil with a structure was selected for the projectile launching experiment, and the error between the simulation results and the experiment was within 10%, proved the reliability of the structure.