Design and Testing of a 10-MJ Electromagnetic Launch Facility

Parametric analysis and design of the initial contact state of a 400kA pulsed current C-armature

“…According to the armature and rail electrical contact requirements, the analytical calculations for different head height contact areas (7MPa) were carried out for a C-type armature with 32.5mm armature length, 2.5mm tail thickness and 7mm throat thickness, the results of which are shown in Figure 15. 15 show that as the armature head height decreases, the contact area between the armature and the track from 11.25mm to 10mm head height continues to increase and level off, with the 11.25mm head thickness armature having the largest contact area with the track at 218.4mm 2 and the 10mm head thickness armature having the smallest contact area with the track at 47mm 2 .…”

“…Electromagnetic Orbital Launch Technology is a new concept of launching technology that converts electromagnetic energy into kinetic energy of projectiles, which has the advantages of high initial velocity and controllable speed, and has great prospects for military applications. As an important component of the rail launcher, the armature is used to ensure good electrical contact between the armature and the rail in the electromagnetic launch process, to avoid arc ablation and other turning phenomena, and its structural design directly affects the current distribution, service life and launch efficiency of the electromagnetic launcher [1][2][3][4] .…”

“…Figure 15. Variation curve of contact area for different armature head heights during armature loading (>7MPa) The calculation results in Figure15show that as the armature head height decreases, the contact area between the armature and the track from 11.25mm to 10mm head height continues to increase and level off, with the 11.25mm head thickness armature having the largest contact area with the track at 218.4mm 2 and the 10mm head thickness armature having the smallest contact area with the track at 47mm2 .In summary, the height of the C-armature head was selected as 11.25 mm according to the constraints of yield stress, contact preload and electrical contact area.…”

A Small-Sized and Battery-Supplied Data Acquisition System for the Electromagnetic Launcher to Measure Pulsed Magnetic Fields

“…Each pulsed power supply unit has a series of the subunit. The compound mode is a benefit to query the error of a power unit, maintain and replace, and improve the work efficiency [6].The charging speed of a power supply unit must fast enough to meet the launching efficiency. For example, charging a 1MJ capacitor bank to 10kv within 60s.…”