A new phase shedding scheme for improved transient behavior of interleaved Boost PFC converters

Author

Ying-Chi Chen ; Jhih-Da Hsu ; Yong-Ann Ang ; Ta-Yung Yang

Author_Institution

Fairchild Semicond., Taipei, Taiwan

fYear

2014

fDate

16-20 March 2014

Firstpage

1916

Lastpage

1919

Abstract

This paper proposes a new phase shedding scheme for interleaved Boost PFC converter to improve the light load efficiency. In the proposed scheme, the power level in the slave channels is reduced linearly as the output loading drops for optimization of light load efficiency. The new scheme also prevents the PFC slaves from switching between the ON and OFF states immediately after phase shedding, thereby improving the load transient behavior of the system. The proposed scheme is verified on a universal input, 390V output, 2.5KW 3-phase interleaved Continuous Conduction Mode (CCM) Boost power factor correction (PFC) converter and experimental results are presented to demonstrate the improved light load efficiency and output voltage stability during load transient.

Keywords

power convertors; power factor correction; CCM; PFC; PFC slaves; continuous conduction mode boost power factor correction converter; interleaved boost PFC converters; light load efficiency; load transient behavior; phase shedding scheme; Hysteresis; Inductors; Power electronics; Power factor correction; Switching loss; Transient analysis;

fLanguage

English

Publisher

ieee

Conference_Titel

Applied Power Electronics Conference and Exposition (APEC), 2014 Twenty-Ninth Annual IEEE

Conference_Location

Fort Worth, TX

Type

conf

DOI

10.1109/APEC.2014.6803567

Filename

6803567