NDLI: Decoupling of fluctuating power in single-phase systems through a symmetrical half-bridge circuit

Content Provider	IEEE Xplore Digital Library
Author	Yi Tang Blaabjerg, F. Poh Chiang Loh
Copyright Year	2014
Description	Author affiliation: Dept. of Energy Technol., Aalborg Univ., Aalborg, Denmark (Yi Tang; Blaabjerg, F.; Poh Chiang Loh)
Abstract	Single-phase AC/DC or DC/AC systems inherently subject to harmonic disturbance which is caused by the well-known double line frequency ripple power. This issue can be eased through the installation of bulky electrolytic capacitors in the dc-link, but such passive filtering approach may inevitably lead to low power density and limited system lifetime. An alternative approach is to use active power decoupling so that this ripple power can be diverted into other energy storage devices to gain improved system performance. Nevertheless, all existing active methods have to introduce extra inductors or film capacitors to store the ripple power, and this again leads to increased component costs. In view of this, this paper presents a symmetrical half-bridge circuit which utilizes the dc-link capacitors to absorb the ripple power, and the only additional components are a pair of switches and a small filtering inductor. A design example is presented and the proposed circuit concept is also verified with simulation and experimental results. It shows that at least ten times capacitance reduction can be achieved with the proposed active power decoupling method, which proves its effectiveness.
Sponsorship	IEEE Power Electron. Soc.
Starting Page	96
Ending Page	102
File Size	1981592
Page Count	7
File Format	PDF
ISBN	9781479923250
DOI	10.1109/APEC.2014.6803294
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-03-16
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Capacitors Voltage control Inductors Films Capacitance Integrated circuit modeling Modulation
Content Type	Text
Resource Type	Article

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