Excitation Circuit Research of a Electromagnetic Gun

A coaxial induction Electromagnetic Gun is a hot topic in the electromagnetic launch (EML) field. Power supply is crucial equipment which determines whether induction Electromagnetic Gun could be used or not. Configuration of the excitation circuit influences the efficiency of the Electromagnetic Gun directly. But which excitation circuit is the best puzzled a lot of people. This paper gives a detailed analysis of the properties of the excitation circuit construction based on the capacitor source. Three topologies of the excitation circuit are compared including oscillation circuit, winding circuit and half-wave circuit. It is proved that which circuit has the better efficiency depends on the detailed parameters of the experiment, especially the winding resistance. Winding resistor regulates not only efficiency of the system, but also temperature rise of the coil. Electromagnetic force (EMF) applied on the armature will be another question which influence service condition of the excitation circuits. Oscillation circuit and winding circuit should apply to the asynchronous induction Electromagnetic Gun and synchronous induction Electromagnetic Gun, respectively. Half-wave circuit is seldom used in the experiment. Although efficiency of the half-wave circuit is very high, speed of the armature is very low. A simple independent half-wave circuit is suggested in this paper. Generally speaking, the comprehensive properties of winding circuit is the most excellent in the three typical circuit. Conclusions of the paper could provide guidelines for practice. A detailed analysis will be presented in this paper.