A fast convergence technique to steady-state solution of PWM current-mode controlled converters

A fast convergence technique for calculating the steady-state solution of current-controlled converters is presented. The methodology uses two iteration loops and a time-domain simulation algorithm. The first loop is to iterate the steady-state network waveforms at a presumed duty cycle while the second one is to iterate the duty cycle that is used in the first loop. The key features of the method include (1) its fast convergence, (2) its simplicity of using simple algebraic manipulations, and (3) its generality for closed-loop current-controlled converters. An example of a current-controlled boost converter will be illustrated. The theoretical predictions are favorably verified with the experimental measurements