Approximate novel loss formulae estimation for optimization of power controller of DC/DC converter

Abstract

This paper presents the analysis and the implementation of a digital voltage power based controller with adaptive loss estimation algorithm. An improved controller of DC/DC boost converter relies on the estimation of all types of the losses which occur in the converter was proposed. The controller use estimating method to estimate the power losses of the converter and converts the losses into two parts, serial and parallel resistances which are used for the reference trajectories. The algorithm is theoretically analyzed, developed and compared with the experimental results for improving the convergence speed and accuracy of the control loop. Mathematical modeling is carried out giving careful consideration to all the significant features and dependant parameters, namely, core hysteresis and eddy current loss, conduction ohmic losses and switching losses of semiconductors. Experimental results allow validating the proposed controller and the estimation losses for an acceptable error nearly 10% and maximum efficiency 93.5%.