Design and experimental research on 1.2 MV pulse transformer

This paper summarized the design method of a 1.2 MV pulse transformer, which adopted the helix-involute winding to enlarge the isolation distance between the winding and the magnetic core. The numerical simulation of ANSYS showed that the maximum electric field was less than 18 kV/mm in this transformer. The local-discharge phenomena of the winding to the insulator were solved through experimental research. The derived pulse transformer could meet the following design specifications:1.2 MV output voltage, 100 Hz repetition frequency and 1 min single runtime.