Theoretical study of pulse forming line (PFL) charged by capacitance through transformer considering the energy recuperation

According to the theory of transformer equivalent circuit, the theoretical study of PFL charged by capacitance through transformer considering the energy recuperation is presented. The analytical expression of counter-voltage of the primary capacitance is obtained when the PFL has been discharged, so the energy transferring efficiency from primary capacitance to PFL considering the energy recuperation, which depends on the parameters of the circuit is got and analyzed. There existing an optimum value of the coupling coefficient of the transformer which is not near to 1, but about 0.8-0.9 in the practical circuit, the results also show that it is very important to reduce farthest the loop resistance. These conclusions are very useful to the design of the transformer and the circuit.