Current-Mode Pulse Train Controlled Quadratic Boost Converter Operating in Discontinuous Conduction Mode

Abstract

Unlike the conventional pulse width modulation control, a unique current-mode pulse train (CMPT) control technique presents a different nonlinear dynamics associated with the power electronics system. The quadratic boost converter in discontinuous conduction mode (DCM) is examined under CMPT control. The control performance of the system is studied by analyzing the combination of high-power control pulse PH and low-power control pulse PL of a control pulse repetition cycle in regulating the output voltage. The computer simulation is accomplished to capture the gist of the system dynamics revealing the periodic transition manifested due to border collision bifurcation under the influence of the variation in input voltage and load resistance. The stability of the system is assessed with the evidence of loci of eigenvalues from two-dimensional discrete-time model and maximal Lyapunov exponents obtained using QR decomposition algorithm. An experimental setup is also developed to verify the simulated and analytical dynamics witnessed.