Input Voltage and Current Sensorless Control of a Single Phase AC-DC Boost Converter

TL;DR

This paper introduces a novel estimator for input voltage and current in a single-phase AC-DC boost converter, enabling sensorless control for power factor correction with proven convergence and effective simulation results.

Contribution

A new filtered transformation-based estimator is proposed for sensorless control, overcoming classical adaptive form limitations in power factor correction applications.

Findings

Estimator achieves global convergence in voltage and current estimation.

Simulation results validate the effectiveness of the proposed control scheme.

Improves power factor correction without direct measurement of input variables.

Abstract

It is well-known that measuring the input voltage and current, as the feedforward and feedback terms, are vital for the controller design in the problem of power factor compensation of an AC-DC boost converter. Traditional adaptive scenarios correspond to the simultaneous estimation of these variables are failed because the system dynamics is not in the classical adaptive form. In this paper, the system dynamics is immersed to a proper form by a new filtered transformation to overcome the obstacle. The phase and amplitude of the input voltage along with the input current is estimated from the output voltage with global convergent. An application of the proposed estimator is presented in conjunction with a well-known dynamic controller. The estimator and controller performances are evaluated by some realistic simulations.