Study on the influence of armature on the efficiency of reluctance accelerator

A multi-stage 130 m/s reluctance linear electromagnetic launcher

“…The projectile was made of a 95% cobalt alloy (2 V-Permendur) known for its high saturation magnetic field, B s ~ 2.4 T, and a relatively high permeability. As a consequence, the magnetic force propelling the projectile is improved resulting in velocity and efficiency enhancement 34 .…”

“…Experiments showed that the launching mass and energy can be extended, but the speed remained low. Research [17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35] has shown results of simulations and related experiments aimed at increasing launching velocity and energy (Fig. 1).…”

“…Rivas-Camacho et al 25 presented coilgun with an inductive power source reaching 8.96 m/s. Deng et al 29,34 showed 30 J record launching energy of coilgun by extending the projectile mass, shortening the electrical pulse, and optimizing the projectile material and shape. Akay et al 30 demonstrated a 17.1 m/s.…”

“…However, Extending the energy of the projectile was demonstrated by increasing the projectile mass to much larger values. Deng et al 29,34 demonstrated 340 g projectile with 30 mm diameter and 60 mm length. Gies et al 23,28 used 690 g plunger with 25 mm diameter and 115 mm length, that was used to push load without launching.…”

Topology Optimization for the Development of Electric Engines

“…The expressions of the electromagnetic force (3.8) and the energy (3.9) consider an integration over Ω armt . However, as in [2], we perform these integrations over a domain that envelops the armature. In this work, instead of Ω armt , we consider the enveloped domain Ωarmt which is 0.5mm away from the armature, that is,…”