Small-signal analysis of interleaved dual boost converter

This paper presents a systematic development of steady-state, small-signal models of interleaved dual boost converter operating in a continuous curren t mode. These models are derived by employing the well-known signal flow gr aph method. This signal flow graph approach provides a means to directly tr anslate the switching converter into its equivalent graphic model, from whi ch a complete behaviour of the converter can easily be studied. Steady-stat e performance, small-signal characteristic transfer functions are derived u sing Mason's gain formula. The bode plots of audiosusceptibility, input imp edance, output impedance, and control-to-output transfer functions are dete rmined and illustrated using MATLAB for different values of load resistance s, duty ratios. Small-signal frequency responses obtained from the signal f low graph method are validated with PSPICE simulator results. To validate t he signal flow graph modelling equations, sample steady-state experimental results are provided. Copyright (C) 2001 John Wiley & Sons, Ltd.