Pulsed Charging of Capacitor Bank by Compact Explosive-Driven High-Voltage Primary Power Source Based on Longitudinal Shock Wave Depolarization of Ferroelectric Ceramics

Results of the investigation of the operation of autonomous ultracompact explosive-driven high-voltage primary power sources based on longitudinal (when the shock wave propagates along the polarization vector P₀) shock wave depolarization of ferroelectric materials in the open circuit and charging modes are presented. The energy-carrying elements of shock wave ferroelectric generators (FEGs) were poled lead zirconate titanate (PZT) Pb(Zr₅₂Ti₄₈)O₃ polycrystalline piezoelectric ceramic disks with volume 0.35 cm³. The PZT modules were shock compressed in the stress range from 1.5 to 3.8 GPa by a longitudinal shock wave generated by high explosives. In the charging mode, the FEGs provided pulsed power with peak amplitudes up to 0.29 MW. The maximum efficiency of the electric charge transfer from the energy-carrying PZT elements to the capacitor bank was 46%.