Title :
Application Criteria for Nine-Switch Power Conversion Systems with Improved Thermal Performance
Author :
Zian Qin ; Poh Chiang Loh ; Blaabjerg, Frede
Author_Institution :
Dept. of Energy Technol., Aalborg Univ., Aalborg, Denmark
Abstract :
Nine-switch converter is a reduced-switch equivalence of the widely used 12-switch back-to-back converter. Like other reduced-switch topologies, the nine-switch converter experiences operating constraints, which may limit its efficiency. This is, however, not universal, meaning losses of the nine-switch converter can at times be lower than the 12-switch back-to-back converter. The scope of this paper is, thus, to identify application criteria for the nine-switch converter, which upon met, will lead to lower conduction and hence total losses. Loss distribution among switches of the nine-switch converter is also investigated, since it can greatly influence reliability of the overall converter. Experimental results obtained have promptly justified the analytical reasoning formulated.
Keywords :
losses; switching convertors; thermal analysis; 12-switch back-to-back converter; application criteria; efficiency limitation; lower conduction; nine-switch power conversion systems; operating constraints; overall converter reliability; reduced-switch equivalence topology; thermal performance improvement; total loss distribution; Capacitors; Matrix converters; Motor drives; Reliability; Switching loss; Topology; Uninterruptible power systems; 12-switch converter; Back-to-back converter; Nine-switch converter; Twelve-switch converter; back-to-back converter; energy systems; loss computation; nine-switch converter;
Journal_Title :
Power Electronics, IEEE Transactions on
DOI :
10.1109/TPEL.2014.2360629