Study on comparison of solenoid coil winding in electromagnetic pulse intensification
To explore a better winding method of solenoid coil,from the perspectives of thermodynamics,space occupancy and winding angle,it is analyzed that rectangular section copper wire is more suitable for winding electromagnetic pulse solenoid coil.The electromag-netic pulse conditions of the five winding types of solenoid coil with voltage of 6 kV were simulated by finite element software,and the e-lectromagnetic force subjected to coil and rod was compared and analyzed.It is found that the force on the flat winding wire is smaller in the single wire.In double wires condition,single layer parallel winding is better than double layers parallel winding.The electromagnetic pulse surface strengthening technique of the rod was used in the experiment.The results show that the deformation of the wires under the action of electromagnetic force and the temperature rise caused by the current thermal effect are the main reasons for the damage of the so-lenoid coil.The single-layer parallel winding solenoid coil with two wires has better performance and longer service life.The electromag-netic pulse can increase the hardness of titanium rods by about 15％,but excessive processing can reduce the hardness.
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