Background Linear Transformer Driver (LTD) is a core device for pulsed power systems. Traditional LTD adopts single-capacitor energy storage, which inherently limits the peak voltage of a single module. A large number of cascaded modules are therefore required to generate high output voltage, which hinders system miniaturization and restricts the flexibility of output waveforms. Propose This work aims to improve the peak voltage of a single LTD module, reduce the total number of modules to realize system downsizing, and achieve diversified pulse outputs for better application adaptability of LTD-based pulsed power supplies.
Method In this research, a novel LTD topology based on series hybrid energy storage (S-HES) is proposed. The traditional single-capacitor structure is replaced with an inductor-capacitor-inductor series configuration, and each energy storage unit is equipped with two turn-off switches to substitute conventional closing switch. High current is obtained by parallel connection of multiple units, while high voltage is achieved via series connection of multiple modules. Circuit simulation is adopted to validate the overall performance of the presented topology.
Results The S-HES structure introduces an extra inductor energy storage phase and pre-charges partial parasitic inductance in the circuit, effectively shortening the pulse rise time. By regulating the triggering timing of turn-off switches, three stable output modes are successfully realized, including double peak voltage, quasi square-wave and double pulse.
Conclusions This topology evidently elevates the single-module peak voltage and facilitates system miniaturization. Its unique multi-mode output characteristic greatly improves the compatibility of pulsed power supplies, enabling the system to be applied to a wide range of pulsed power scenarios.
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