Extension of working range of a current sensorless unity power factor utility interface

Abstract

The presented work shows further improvement made to the boost-type switch mode rectifier developed in [1]. Modern industry offers various analog controllers for power factor correction purposes. Their manufacturers claim to provide the capability to control a broad range of input and output parameters. The rectifier in [1] has several major advantages over conventional power factor correction (PFC) converters. It is controlled by a fully programmable digital signal processor, it does not utilize a current sensing resistor for current feedback, it is capable of calculating real values of rectifying inductor parameters employed for current values calculation, etc. However, the developed converter has one significant drawback - limited input voltage range. The focus of the present project is an extension of alternating voltage range that can be supplied to the described circuit.