Modeling and simulation of Parallel Current Mode controlled boost converter

In this paper, Parallel Current Mode Control method for Boost DC-DC converter is proposed. The parallel current mode control strategy is composed of two parallel terms: one is voltage term, the other is current term. They are calculated based on the input voltage, reference output voltage, inductor current and reference inductor current. The Parallel Current Mode Control method essentially distinguishes itself from the conventional current mode control method with two regulators, one for voltage regulation and the other for current regulation. Under the conventional Voltage Mode Control method and the new control method, small-signal models of Boost DC-DC converter are derived. The simulation result (based on the transfer functions) using Matlab/Simulink is compared with the simulation result based on the circuit simulation model, using PSIM. Results both in Matlab/Simulink environment and in PSIM environment are in good agreement, confirming the validity of the small-signal model. Both the small-signal analysis and simulation results demonstrate that Parallel Current Mode Control has superior performance as compared with Voltage Mode Control.