Design and Characteristics of a High-Power Pulse Transformer Based on a Closed Cage Core Structure

The electromagnetic parameters of the pulse transformer are determined by its structure and are of great significance to the performance of the pulse source. For the high power and voltage pulse discharge application with repetition frequency, a design of the high-power pulse transformer with a closed cage core structure for high energy efficiency is proposed based on the analysis of the resonant circuit. Through the analytical calculation, the finite element method (FEM) model, and the field-circuit coupled analysis, the key parameters and characteristics of the proposed transformer are obtained and investigated. The prototype is developed according to the design and a high-power repetitive frequency pulse source platform with an energy release circuit is constructed for the performance test. The experimental results indicate that the pulse transformer prototype can meet the requirements of output voltage higher than 500 kV, average power higher than 100 kW, and repetition frequency operation up to 25 Hz.