A SPICE compatible model of magamp post regulators

Small-signal modeling of nonideal magamp PWM switch

“…2, which represents the voltage across the magamp inductor with the voltage reset, the volt-second (flux) balance during the blocking and resetting time intervals yields (11) where is the reset time of the transformer core. This reset time can be calculated from the volt-second balance requirement of the transformer core, i.e., from (12) After substituting and from (3) and (4) and from (12) in (11), the relationship between and can be derived as (13) Using the relationship given in (13) to eliminate in the equivalent circuit in Fig.…”

“…Various issues related to the operation, design, modeling, control, and simulations of magamps were discussed in [2]- [11]. However, while the operation of magamps with nonideal magamp-core materials was analyzed in [2] and [3], the small-signal analysis, modeling, and simulations of magamps have been, so far, exclusively carried out under the assumption of the ideal squareness of the B-H curve of magamp's core material [4]- [11].…”

“…However, while the operation of magamps with nonideal magamp-core materials was analyzed in [2] and [3], the small-signal analysis, modeling, and simulations of magamps have been, so far, exclusively carried out under the assumption of the ideal squareness of the B-H curve of magamp's core material [4]- [11]. The objective of this paper is to introduce accurate circuitbased small-signal models of magamps which include the effects of the nonideal squareness of magnetic-core materials.…”