A new reluctance coilgun based on capacitive absorption topology circuit
Reluctance coilgun has the advantages of good exit velocity consistency,high reliability,and clean energy,but the existing reluctance coilgun is generally low efficiency,which limits its engineering application.In order to improve the launching efficiency,a novel reluctance coilgun based on capacitive absorption topology circuit was proposed.Firstly,the model of the traditional two-stage reluctance coilgun was established and the simulation calculation was carried out by finite element software.The results show that after the armature passes through the center of the coil,the magnetic field generated by the remaining current in the driving coil will cause the armature to suffer the reverse drag force and slow down.To solve these problems,a new energy recovery scheme based on capacitive absorption topology circuit was proposed,and the discharge characteristics of each stage were analyzed.The calculation results show that:compared with the traditional discharge circuit,the new discharge circuit can make the residual current of the drive coil absorbed by the capacitor to achieve rapid attenuation,the armature muzzle speed increases from 21.46 m/s to 26.19 m/s,and the efficiency increases from 14.50%to 21.59%.The results show that the new discharge circuit can recover the residual energy after the armature acceleration,reduce the armature drag force obviously,and improve the muzzle speed and energy recovery efficiency.
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