A novel current control scheme for grid-connected single-phase PWM bridgeless power converters

In this paper, a new bridgeless single-phase AC–DC power factor corrector is presented. The proposed scheme is based on the interleaved topology of buck–boost converter without a bridge rectifier at the input stage for AC–DC conversion. The required AC–DC conversion is done with the help of the interleaved topology of the buck–boost converter. The absence of rectifier bridge at the input side of the circuit means the reduced numbers of the diodes in the circuit which results in less conduction and power losses. The advantages of such topology includes less power losses in the circuit, low voltage stress on the switch, and improved efficiency of the overall system. Two circuits are used in this paper which are connected in parallel to each other, each circuit comprising the two interleaved boost converters for AC–DC conversion to reduce the power losses and to provide an alternative approach for efficiency improvement. This Power Factor Correction PFC converter will control the output voltage to provide a regulated DC voltage at the user end, and at the same time, it will draw a sinusoidal input current from the power supply source to maintain the power factor of the system. MATLAB is used as a software for results, and simulation results are performed to present the feasibility of the proposed technique.

ISBN:9789811916076

Publication year:2023

Accessibility:Open