Analysis of DC/DC converters by mean node voltage method

Abstract

This paper proposes the analysis of buck, boost and buck-boost converters by the mean node voltage method to implement them in simulink® environment. The corresponding equivalent linear circuit in the s-domain are determined and the static gain, the audio susceptibility function, the output impedance and the control-to-output transfer functions are deduced accounting for the parasitic effects of inductors and capacitors as well. This approach is simpler compared to the state space averaging method and allows the simulation time to be reduced. The implementation in Simulink environment® of the converters are described and finally the simulated waveforms of a buck converter are compared with the experimental ones.