Design Evaluation of a High Voltage High Frequency Pulse Transformer

Abstract: Unlike commonly used regular transformers, high voltage, high frequency, pulsed transformers are generally represented in special purpose applications. This often means that these electrical devices must be tailored in accordance with the specic requirements of the project. The pulse transformer under analysis in this thesis is a prototype machine variation of which will serve as an essential part of klystron feeder system at the European Spallation Source. In the given application hundreds of pulse transformers will be required in order to supply power for the particle accelerator. The devices will be be integrated into high voltage, high frequency, pulsed power modules. The importance of careful analysis of the prototype system can therefore not be stressed enough. Throughout this thesis work the reliability and functionality of the prototype pulse transformer are examined closely with help of analytic methods, computer aided simulation and laboratory analysis. The design is evaluated in terms of several important qualities such as low voltage drop, sucient rise times and ability to operate without occurrence of unwanted high voltage phenomena. Both electromagnetic and mechanic aspects are included into the study. As the result of the performed work, an evaluation conclusion is presented together with possible improvements of the current design. Aim of the study is to provide a verication as well as present possible alternatives for the transformer system design.