Modeling and control of average input current to enhance power density for three-phase interleaved boost converters

This paper evaluates the comprehensive optimization process of associated passive components of three-phase front-end interleaved boost converters (IBCs) to enhance the power density. It was found that the circulating zero-sequence current between rectifiers gives a negative impact on the low-order harmonics of the input current. The effect of circulating current was first analyzed in detail and the average input current model was developed in the presence of the circulating current. The model is subsequently incorporated into the development of the physics-based average current controller to compensate for harmonic distortions without sacrificing the system power density. The proposed method can be an attractive solution for enhancing the power density of low-power consumer electronic applications that need to meet the harmonic regulations.