Study on the Influence of Transformer Parasitic Parameters Based on IPOS Topology on High-Voltage Pulse Waveform

High-voltage pulsed generators are essential excitation sources for low-temperature plasma (LTP) generation. Conventional topologies combining solid-state switches and pulse transformers often suffer from undesirable waveform distortion and excessive rise time in the output pulse. To address these limitations, this work proposed an equivalent pulse transformer model based on the input-parallel, output-series (IPOS) topology, systematically investigating the influence of transformer quantity and turns ratio on pulsed voltage waveform. The results revealed that increasing the number of transformers elevates leakage inductance, thereby extending the rise time and reducing voltage gain. Furthermore, strategic optimization of both transformer quantity and turns ratio enables effective leakage inductance suppression, thereby shortening rise times and enhancing voltage gain while maintaining the ideal step-up ratio. Finally, a high-frequency modulated, bipolar nanosecond pulsed generator was subsequently designed and tested, achieving output voltages up to 8.5 kV, pulse durations of 500 ns (FWHM), frequency of 47kHz in a burst mode, and rise times as short as 180 ns. The prototype successfully powered a surface dielectric barrier discharge (DBD) reactor for controllable ozone production. This work offers critical guidelines for parasitic parameter optimization in IPOS-based, multitransformer high-voltage pulsed generators, advancing their performance in plasma applications.