Semi-Digital Interleaved PFC Control with Optimized Light Load Efficiency

Author

Grote, T. ; Figge, H. ; Fröhleke, N. ; Beulen, W. ; Schafmeister, F. ; Ide, P. ; Böcker, J.

Author_Institution

Inst. of Power Electron. & Electr. Drives, Univ. of Paderborn, Paderborn

fYear

2009

fDate

15-19 Feb. 2009

Firstpage

1722

Lastpage

1727

Abstract

A control structure for an interleaved power factor correction (PFC) rectifier with smart combination of analog and digital control parts is presented in this paper. Analog technique is employed to accomplish high control bandwidth while digital control is used for parts of lower dynamic demands. This results in low microcontroller costs though the system is kept flexible. Particularly, the control strategy can be adapted depending on the operation point. Since the light load performance is in recent focus of interest, appropriate algorithms to improve light load efficiency were implemented on a prototype system and are briefly described in this paper. The effectiveness of the proposed semi-digital control approach is verified by experimental results.

Keywords

digital control; load regulation; microcontrollers; power factor correction; rectifiers; analog control parts; digital control parts; microcontroller costs; optimized light load; power factor correction rectifier; semidigital interleaved PFC control; Bandwidth; Control systems; Digital control; Energy management; Lighting control; Microcontrollers; Power factor correction; Pulse width modulation; Rectifiers; Voltage control; digital control; interleaving; power factor correction rectifier; power management; semi-digital control;

fLanguage

English

Publisher

ieee

Conference_Titel

Applied Power Electronics Conference and Exposition, 2009. APEC 2009. Twenty-Fourth Annual IEEE

Conference_Location

Washington, DC

ISSN

1048-2334

Print_ISBN

978-1-4244-2811-3

Electronic_ISBN

1048-2334

Type

conf

DOI

10.1109/APEC.2009.4802902

Filename

4802902