Efficiency Evaluation of Three-phase SiC Power Factor Correction Rectifier with Different Controllers

Alireza Kouchaki, Morten Nymand

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Abstrakt

This paper presents a comprehensive design of a 5 kW silicon-carbide (SiC) based three-phase power factor correction (PFC) to achieve high conversion efficiency. It evaluates the efficiency of the converter by comparing two controllers: a controller without harmonic compensation (HC) in the rotational reference frame and a controller with HC in the stationary reference frame. SiC switches, by exhibiting a low capacitive switching loss compared to Si switches, help increasing the switching frequency and reducing the size of the line filter. To achieve a very high efficiency converter, the controller has an impact on the efficiency, especially at low load. Normally, the current quality of grid-connected converter at low load reduces due to the non-linearity of the converter. This reduction influences the efficiency. In this paper, two methods are presented to improve the current quality at low loads: either increasing the converter-side inductance to yield lower current ripple or improving the controller to mitigate the low frequency current harmonics. Both methods are investigated in this work and it is proved that using a proper controller can help reducing the converter-side inductor to 2/3 which has a great impact on the efficiency. An optimized 5 kW SiC based PFC is designed. Maximum measured efficiency of 99% at full load is achieved.

OriginalsprogEngelsk
TitelProceedings of the 20th European Conference on Power Electronics and Applications, EPE 2018 ECCE Europe
Antal sider10
ForlagIEEE
Publikationsdato30. okt. 2018
ISBN (Trykt)978-1-5386-4145-3
ISBN (Elektronisk)978-9-0758-1528-3, 978-9-0758-1529-0
StatusUdgivet - 30. okt. 2018
Begivenhed20th European Conference on Power Electronics and Applications, EPE 2018 ECCE Europe - Riga, Letland
Varighed: 17. sep. 201821. sep. 2018

Konference

Konference20th European Conference on Power Electronics and Applications, EPE 2018 ECCE Europe
LandLetland
ByRiga
Periode17/09/201821/09/2018

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Citationsformater

Kouchaki, A., & Nymand, M. (2018). Efficiency Evaluation of Three-phase SiC Power Factor Correction Rectifier with Different Controllers. I Proceedings of the 20th European Conference on Power Electronics and Applications, EPE 2018 ECCE Europe IEEE.