Power Supply Chain with Series Isolation Structure applied in High-voltage Tail-cut Marx Generator

Marx pulse generator with tail-cut switches is widely used for its wide load applicability and reliability. For Marx generator, the isolated power supply (IPS) for the drivers in each stage is a key issue, which is one of the factors that restrict the amplitude of the output pulses. In this paper, power supply chain (PSC), a series structure of IPS is proposed to apply to tail-cut Marx generator. The isolation circumstance of PSC remains the same for each stage, which increases the minimum isolated utilization ratio (IUR) to almost 90%, compared to the existing parallel structures, thus reducing the voltage stress and enhancing the isolation adjustability. Finally, an 8-staged tail-cut Marx prototype is developed to examine the compatibility of PSC. The withstand voltage of PSC can be easily adjusted within 14 kV according to the number of diodes. The PSC does not require external control signals and does not interfere with gate driving synchronization or load waveforms, which offers a new solution of IPS for tail-cut Marx generators designed at a nanosecond scale.