Formulation of a methodology for power circuit design optimization

DC-to-DC Converter Power-Train Optimization for Maximum Efficiency

“…Pswf VQfIXBtSWf (4) Px = lAotABmfs + 12rmsRw (5) The core loss and winding loss model is taken from [3,4] and is summarized in (5) of Table I, where Px represents the total reactor losses. As discussed in [3], the core loss is expressed as a function of a constant ox, the flux density excursion AB = BB -BA and the conversion frequencyfs.…”

“…In general, converter design optimization is a multidimensional problem [5] that is not easily pictured by the designer, who by nature is limited to three dimensions. Very familiar design problems, such as trying to maximize converter efficiency, are difficult for even the most experienced converter designer to visualize.…”

“…Even for the relatively simple case where we restrict to two the number of free design parameters, the relationships between the three performance functions, efficiency, normalized ripple current, and reactor temperature rise, are too complex for even the most experienced designer to visualize without computer aids. Often, the designer must choose many more than just two free design parameters [5], which is perhaps the major reason that dc-to-dc converter design is conceptually so challenging. For example, using the circuit and loss models of Sections II and III, we show below that at least 19 inde-WILSON ETAL: DC-TO-DC POWER TRAIN EFFICIENCY OPTIMIZATION4 pendent design choices must be made in order to define adequately a current step-up converter design.…”

“…(1) converter specifications (2) design objective function [5] (3) remaining design parameters (4) performance function constraints.…”