The Application Research Of IGBT In Superconducting Magnetic Energy Storage Pulsed Power System

Superconducting magnetic energy storage pulsed power system has more advantages compared to conventional pulsed power system, such as higher power storage density, higher transmission power and static storage can be realized without losses, and so on. It has been widely applied in National Defense Construction and civil manufacture, and has been paid more and more attention. A limitation in the superconducting energy storage system is the opening switches, since the amplitude of the output pulse shape, width and stability are all constrained by the opening switch. This paper investigate the opening switch structure of superconducting magnetic energy storage pulsed power systems.Compared to conventional opening switches, solid state switches have more advantages as the main opening switch of superconducting magnetic storage pulsed power systems. And, by comparing the familiar power electronic devices, the paper selects IGBT as the main object to study. Meanwhile, the advantages, characteristics, structure, drive and protection circuit of IGBT was discussed.Superconducting magnetic storage pulsed power systems require high-capacity opening switch. The series and parallel technology of IGBT is extremely urgent. This paper discusses the series and parallel connection technology of IGBT in the fourth chapter and fifth chapter. In the research of dynamic current balancing of parallel IGBT, the methods of pulse transformer and gate resistance compensation are proposed. Principal of these two methods and experimental results with parallel connected two IGBT are described. After that, A method of multi-level IGBT drive signal synchronization dynamic compensation also be proposed in this paper by employ multi-transformers.The dynamic voltage balancing technology of series IGBT is the research focus at home and abroad. For the high stability requirements of superconducting magnetic storage pulsed power systems, this paper present a hybrid dynamic voltage balancing technique based on terminal voltage clamp and snubber circuit, which can achieve good voltage balancing with minimum number of components and minimum total losses.