Capacitor Voltage Regulation and Pre-Charge Routine for a Flying Capacitor Active Rectifier
In this paper, a research is carried out on a single-phase flying capacitor active rectifier. In order to regulate the voltage of the flying capacitors, a method based on redundant state selection is developed that generates an offline switching table. In addition, an online process is introduced that, by using the offline table, reduces the total number of switching events in the converter which leads to a reduction of switching losses. This method can be used for a flying capacitor converter with any number of levels. Furthermore, in order to control the inrush current during the start-up procedure and avoid extra voltage and current stresses for active switches and capacitors, a pre-charge routine for the flying capacitors is proposed. Experimental results demonstrate the benefits of the new concepts.
H. Sepahvand et al., "Capacitor Voltage Regulation and Pre-Charge Routine for a Flying Capacitor Active Rectifier," Proceedings of the 4th Annual IEEE Energy Conversion Congress and Exposition (2012, Raleigh, NC), pp. 4107-4112, Institute of Electrical and Electronics Engineers (IEEE), Sep 2012.
The definitive version is available at https://doi.org/10.1109/ECCE.2012.6342265
4th Annual IEEE Energy Conversion Congress and Exposition (2012: Sep. 15-20, Raleigh, NC)
Electrical and Computer Engineering
Keywords and Phrases
Active Rectifiers; Active Switches; Current Stress; Flying Capacitor; Flying Capacitor Converter; In-Rush Current; Offline; On-Line Process; Pre-Charge; Start-Up Procedure; State Selection; Switching Loss; Switching Tables; Energy Conversion; Exhibitions; Voltage Regulators; Capacitors
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Article - Conference proceedings
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