Abstract
Equivalent impedances (EQIM) of three-stage synchronous induction coil launcher (SICL) under the different conditions, such as the EQIM before three-stage driving coils are assembled, the EQIM with armature and without armature after three-stage driving coils are assembled, are measured by means of digital electric bridge of UC2856A. Measurement results under the different conditions are compared and analyzed. The change laws of equivalent inductance (EQIN) and equivalent resistance (EQRE) of each stage versus the armature’s location are provided when the armature moves along the axial line of the three-stage SICL. Measurement results are in accordance with the theoretical analysis results of EQIN and EQRE of each stage. These have important significances for the prediction of each stage driving current’s wave and the determination of the initial value of each stage driving current’s change ratio at energized time in the solution process of the firing control model.
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