A Pulse Generation Circuit Based on Series Hybrid Energy Storage

Abstract

As an extension research of pulse power generation method, we proposed a new variant of pulse generation circuit based on hybrid energy storage (HES). The energy storage structure of the proposed circuit is a series connection of two capacitors and one inductor, referred as a CLC series HES circuit. Under the control of two switches, the capacitors on both sides simultaneously transfer energy to the center inductor, shortening the inductor’s charging time. Moreover, these two switches act as opening switches for inductive discharge, and their current is only half of the inductor current, meaning that this CLC circuit can effectively alleviate the current limitation of the opening switches. In this research, based on power SiC MOSFETs, experimental circuits have been set up to verify the feasibility of the proposed circuit. As a result, when charging at 200 V, the output voltage of one CLC module on a $10~\Omega $ load is ~800 V, with a rise time of ~13 ns and a pulse half width of ~24 ns, and the operation stability at 1000 Hz has been demonstrated. Finally, by gradually increasing the module number to four stages, the stackability of the multiple-module CLC series HES pulse generation circuit has also been confirmed. When the charging voltage is 800 V, the output voltage on a ~40- $\Omega $ load is ~2.9 kV with a rise time of 17 ns.