Repeated Pulse Power Supply Technology Based On HTS Pulse Transformer

With the gradual development of pulse power technology,miniaturization and lightweight have become the main development trend in practical application.Therefore,high-density energy storage technology and high-power fast release technology have become the core issues of current pulse power technology research,and require excellent repeatability and operability of the output pulse waveform.Traditional superconducting pulse power supply system with energy storage has many shortcomings,such as unstable peak value and low peak value,low energy utilization rate,single pulse power supply circuit can only obtain one current pulse peak at a time,and can not generate repetitive pulse waveforms efficiently.To address the above issues,this paper proposes a repetitive pulse based on high temperature superconducting capacitive hybrid energy storage pulse transformer.The power supply circuit structure,that is,the capacitor energy storage module is added on the basis of the original inductor energy storage circuit.After the mixed energy storage of the inductor and capacitor,the primary side current value is greatly increased,thereby increasing the secondary side current pulse peak and energy transmission.Efficiency has also improved significantly.Firstly,this paper analyzes the repetitive pulse power supply system of the inductive energy storage type and the hybrid energy storage pulse power supply system based on the meat-grinder circuit.Fundamental research on the working principle and simulation analysis of the two circuit systems is carried out.Then the circuit structure and various energy storage modes are analyzed and compared,and a new type of high temperature superconducting hybrid energy storage repetitive pulse power supply circuit system is obtained.The principle of the new repetitive pulse power supply system is analyzed,and the circuit simulation of the repetitive pulse power supply system is carried out.It is verified that the new repetitive pulse power supply circuit can stably obtain larger values of repetitive pulse peak,and the energy transmission efficiency reaches more than 85%.Because the parameters of the pulse power supply system need to be set manually,and the relevant waveforms and trend charts can not be automatically given when the parameters change,a fast solution method for the circuit system of the pulse power supply suitable for high temperature superconducting pulse transformer is proposed in this paper.The pulsed power system is transformed in stages by Laplace transform and solved by the formula to obtain the current and voltage of the input and output of the pulse power supply system.It solves the problem of cumbersome value selection of repetitive pulse power supply system,the system is more convenient and simplified in simulation analysis,and the change of parameters of multiple groups of system can be analyzed in detail and regularly.The results obtained by MATLAB programming are compared with the simulation results,and the accuracy of the method is verified.The effects of the parameters of the repetitive pulse power supply circuit system on the output characteristics are studied from the aspects of coupling coefficient,capacitance parameter and energy transmission efficiency.Finally,in order to verify the feasibility of the repetitive pulse power supply circuit system of the new high-temperature superconducting hybrid energy storage pulse transformer,the discharge experiment was carried out under the condition of liquid nitrogen cooling using a small pulse transformer.The experimental results are basically consistent with the simulation results.The relative error is about 0.6%,which can verify the feasibility and applicability of the repetitive pulse power system model based on high temperature superconducting pulse transformer and its parameter analysis method.