Design and Analysis of a Repetitive Current Controller for a Single-Phase Bridgeless SEPIC PFC Converter

Jinwoo Kim,Younghoon Cho,Hyunsoo Koh,Sanghun Han,Wontae Cho

doi:10.3390/en12010131

Jinwoo Kim, Younghoon Cho + Show 3 more

Open Access

https://doi.org/10.3390/en12010131

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Journal: Energies	Publication Date: Dec 31, 2018
Citations: 6	License type: CC BY 4.0

Affiliation: Konkuk University, Texas Instruments (United States)

Abstract

This paper studies a repetitive controller design scheme for a bridgeless single-ended primary inductor converter (SEPIC) power factor correction (PFC) converter to mitigate input current distortions. A small signal modeling of the converter is performed by a fifth-order model. Since the fifth-order model is complex to be applied in designing a current controller, the model is approximated to a third-order model. Using the third-order model, the repetitive controller is designed to reduce the input current distortion. Then, the stability of the repetitive controller is verified with an error transfer function. The proposed controller performance is validated by simulation, and the experiment results show that the input current total harmonic distortion (THD) is improved by applying the proposed controller for an 800 W bridgeless SEPIC PFC converter prototype.

Highlights

Until now, many power conversion systems (PCS) are connected to grid and harmonic pollution becomes an issue [1,2]
8, which consists of the repetitive controller proposed current controller is shown in Figure 8, which consists of the repetitive controller and the and the P controller in parallel
power factor correction (PFC) converter consists of error a silicon carbide to (SiC)

Summary

Introduction

Many power conversion systems (PCS) are connected to grid and harmonic pollution becomes an issue [1,2]. General PCS needs AC-DC conversion to operate with the grid, and the easiest way is using a diode rectifier. It can decrease the power quality due to harmonics of the input current of the diode rectifier [3]. To improve the quality of the input current, the grid-tied power factor correction (PFC) converter can be applied. The PFC converter can achieve a unity power factor operation with the sinusoidal input current, which has low harmonics. The boost PFC converter is used, due to the simplicity, efficiency and low cost [4,5,6]

Methods

Results

Conclusion