Abstract
One of the important research directions in pulse power technology is to increase power density and operational stability of compact high-power pulse transformers. In this paper, the research object is a high-power pulse transformer using combined insulation, and the operating characteristics are obtained using simulation and experiment methods. The experimental results show that the maximum output voltage of the transformer increases by 30% in the combined insulation. At the same time, the combined insulation transformers are safer and have better insulation holding capacity. Moreover, multiple breakdowns have less effect on the subsequent breakdown voltage of the combined insulation transformer. The average subsequent breakdown voltage after 30 breakdowns of combination insulated transformers is still higher than the first breakdown voltage of non-combined insulation transformers. In addition, the energy storage density of combined insulation transformers is ∼40% higher than that of non-combined insulation transformers because of the higher permittivity of Midel 7131 than transformer oil.
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