Optimization design and research of a hybrid excitation compulsator

Compulsator is the best pulse power supply of electromagnetic gun, into which the energy storage, electromechanical energy conversion and pulse shaping are integrated. Compulsators were usually electrical excitation. The permanent magnetic excitation was introduced to simplify the structure and remove brushes and slip rings based on an individual electrical excitation compulsator. The existent hybrid excitation compulsator was analyzed and some experiments were done. Some problems were presented therefrom, such as the no-load voltage waveform distortion, the inhomogeneous magnetic field distribution, and the complicated end compensation structure. The hybrid compulsator was optimized in the paper by arranging its armature and field windings in different form, and increasing the axial length of shield instead of the original structure. The influences on permanent magnet during high current pulse discharge were researched, and the method to check the safety of the permanent magnet was presented. The self-excitation control mode of experimental prototype was developed; the special self-excitation process and realization mode were elaborated. Comparing with electrical excitation compulsators, seed current was not required during which the hybrid excitation compulsator established the self-excitation process.