This article presents the numerical simulation with finite element method o
f the transient regime of an asynchronous generator with iron-free cylindri
cal solid rotor. During this operation kinetic energy of the rotor is trans
ferred through the ideal rectifier bridge to a load-inductance in order to
create a high magnetic field pulse. The interest of this device is the less
value of capacitors battery for self-oscillations of the asynchronous gene
rator compared to this one necessary for direct transfer of its energy to t
he load-inductance.