Modeling and Control of a Three-Phase Boost Converter for Resistive Input Behavior

In this paper, a new modeling and control technique for a three-phase boost converter is presented for efficient transfer of energy from an irregular input power source to a battery storage device or a dc link. First, a circuit model for a three-phase boost converter is developed using the method of averaging, followed by a derivation of the conditions under which the pulse width modulated switching circuit exhibits a resistive behavior from the input. Based on the circuit model obtained, a new model-based feedback control scheme is presented to regulate the phase-to-phase input resistances of the circuit to desired values. The circuit can provide purely active power conversion of a band-limited input voltage source to a dc link, which is of interest in boost converters for certain energy conversion systems. Simulation and experimental results are presented that illustrate performance of the proposed modeling, feedback control, and switching scheme for a low-power application.