Optimization of DC-DC converters via geometric programming

Identifier:  imarina:6386789

Handle: https://hdl.handle.net/20.500.11797/imarina6386789

Authors:  Ribes-Mallada, U; Leyva, R; Garces, P

Abstract:
The paper presents a new methodology for optimizing the design of DC-DC converters. The magnitudes that we take into account are efficiency, ripples, bandwidth, and RHP zero placement. We apply a geometric programming approach, because the variables are positives and the constraints can be expressed in a posynomial form. This approach has all the advantages of convex optimization. We apply the proposed methodology to a boost converter. The paper also describes the optimum designs of a buck converter and a synchronous buck converter, and the method can be easily extended to other converters. The last example allows us to compare the efficiency and bandwidth between these optimal-designed topologies. © 2011 U. Ribes-Mallada et al.