Sliding Mode Control of the Isolated Bridgeless SEPIC High Power Factor Rectifier Interfacing an AC Source with a LVDC Distribution Bus

Oswaldo Lopez-Santos,Germain Garcia,Luis Martinez-Salamero,Alejandro Cabeza-Cabeza

doi:10.3390/en12183463

Oswaldo Lopez-Santos, Germain Garcia + Show 2 more

Open Access

https://doi.org/10.3390/en12183463

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Journal: Energies	Publication Date: Sep 7, 2019
Citations: 5	License type: CC BY 4.0

Affiliation: Universidad de Ibagué

Abstract

This paper deals with the analysis and design of a sliding mode-based controller to obtain high power factor (HPF) in the bridgeless isolated version of the single ended primary inductor converter (SEPIC) operating as a single-phase rectifier. In the work reported here, the converter is used as a unidirectional isolated interface between an AC source and a low voltage direct current (LVDC) distribution bus. The sliding-mode control is used to ensure the tracking of a high quality current reference at the input side, which is obtained from a sine waveform generator synchronized with the grid. The feasibility of the proposal is validated using simulation and experimental results, both of them confirming a reliable operation and showing good static and dynamic performances.

Highlights

The use of rectifiers operating with high power factor (HPF) is a mandatory issue today in AC-DC
Converter with the mentioned constraints can be observed in terms of simple implementation, fast and robust response, and general improvement of quality indicators such as high power factor (>0.98)
The use of a hysteresis-based sliding mode control approach to ensure the tracking of a high quality current reference yielded very satisfactory results

Summary

Introduction

The use of rectifiers operating with high power factor (HPF) is a mandatory issue today in AC-DC conversion [1]. This fact reduces the negative impact on the power quality of AC distribution networks caused by the increasing introduction of new energy processing technologies such as electric mobility and efficient lighting, among others. It is possible to integrate the HPF rectification function in multi-mode converters, which can provide bidirectional power transfer capability or multiple power conversion types (AC-DC, DC-DC, and DC-AC), which eventually has an important impact on the power density of the converter in the electric vehicle [3]. HPF rectifiers allow improving the input power quality and the general performance of LED lamps, which currently constitute the leading lighting technology in the market [4].

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