Start-Up Procedure and Switching Loss Reduction for a Single-Phase Flying Capacitor Active Rectifier


This paper describes a research conducted on a single-phase flying capacitor active rectifier. An online process that reduces the total number of switching events, which leads to a reduction of switching losses in the converter, is introduced. This method is based on redundant state selection, which is used to regulate the voltage of flying capacitors. The proposed approach is general and can be applied to flying capacitor converters with any number of levels. Furthermore, in order to control the inrush current at the start of operation and avoid extra voltage and current stress for active switches and capacitors, a start-up procedure that precharges the flying capacitors is proposed. With this precharge procedure, no additional hardware is needed. Simulation and laboratory results demonstrate these new concepts.


Electrical and Computer Engineering

Keywords and Phrases

Switching; Active Rectifiers; Active Switches; Flying Capacitor (FC); Flying Capacitor Converter; In-Rush Current; Redundant State; Start-Up Procedure; Switching Loss; Capacitors; Single-Phase Active Rectifier; Start-Up Procedure Of Active Rectifier; Switching Loss Reduction; Capacitors; Swtiches; Rectifiers; Voltage Control; Indexes; Logic Gates

International Standard Serial Number (ISSN)

0278-0046; 1557-9948

Document Type

Article - Journal

Document Version


File Type





© 2013 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.

Publication Date

01 Sep 2013