Modern robust controller design for PWM DCDC converters

Abstract EN

A linear feedback controller for PWM DC/DC regulators is designed using a frequency domain optimization method based on IMC theory.

This method aims to produce suboptimal low-order controllers which are “robust”, in the sense that the closed-loop system is guaranteed to meet stability objectives in the presence of model uncertainty.

The small-signal model of a DC/DC converter is used for the controller design.

The model uncertainty description derived here is based on experiments and nonlinear modeling.

The result of the synthesis is a family of controllers, and each member of this family satisfies the robust control objectives.

All controllers have a multi-loop structure.

A detailed design of the controller, including some experimental and simulation results, is presented.