Simulation of Switching Converters Using Linear Capacitor Voltage and Inductor Current Prediction and Correction

TL;DR

This paper introduces a fast, accurate simulation algorithm for switching converters that predicts and corrects inductor current and capacitor voltage without prior knowledge, enabling efficient large signal transient analysis.

Contribution

The proposed algorithm allows large signal simulation of switching converters with fixed solving steps, avoiding convergence issues and improving speed and accuracy.

Findings

Enables simulation of various constant frequency switching converters.

Requires only two circuit solves per switching period.

Achieves fast and accurate large signal transient simulation.

Abstract

In this paper an algorithm for transient simulation of switching converters using prediction and correction to calculate duty ratio is proposed. It provides large signal simulation on the level of averaged currents and voltages in the circuit. Calculation of duty ratio using inductor current and capacitor voltage prediction and correction do not require their priori knowledge. Number of circuit solving per switching period is fixed and equal to two. Using this algorithm various of constant frequency regulated switching converters can be simulated. Due to predetermined circuit values convergence problems are avoided. This algorithm results in very fast and accurate large signal simulation.