Parameter Analysis of the Energy Transfer Capacitor in the Meat Grinder With SECT Circuit

摘要

The meat grinder with SElf-charged Capacitor and Thyristors circuit is a novel circuit for inductive pulsed power supplies. The energy transfer capacitor is one of the key components in this circuit. And its capacitance C and the precharged voltage UC are key parameters worth investigating. The circuit working process and corresponding numerical calculation method are briefly introduced. And the method validity is verified through experiments. Then, the influences of C and UC on circuit performance indices, i.e., the maximum voltage across the main switch Vsopm , the secondary current multiplication factor m2 , the ratio of the maximum capacitor energy over the inductor charging energy ηC , and the self-recovery rate of the precharged capacitor voltage kUC , are quantitatively analyzed through parameter sweep. Generally speaking, large C is conducive to lower Vsopm ; small C and high UC are conducive to higher m2 ; small C and low UC are conducive to lower ηC and higher kUC . Moreover, the analytical expression of kUC is given. With C and UC elaborately selected, kUC can achieve 100%. In addition, the balance relationship between two contradictory indices Vsopm and kUC is obtained by solving a biobjective optimization problem and using the genetic algorithm.