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

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 U
_C
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 U
_C
on circuit performance indices, i.e., the maximum voltage across the main switch V
_sopm
, the secondary current multiplication factor m
₂
, the ratio of the maximum capacitor energy over the inductor charging energy η
_C
, and the self-recovery rate of the precharged capacitor voltage k
_UC
, are quantitatively analyzed through parameter sweep. Generally speaking, large C is conducive to lower V
_sopm
; small C and high U
_C
are conducive to higher m
₂
; small C and low U
_C
are conducive to lower η
_C
and higher k
_UC
. Moreover, the analytical expression of k
_UC
is given. With C and U
_C
elaborately selected, k
_UC
can achieve 100%. In addition, the balance relationship between two contradictory indices V
_sopm
and k
_UC
is obtained by solving a biobjective optimization problem and using the genetic algorithm.