Magnetic Design Aspects of Coupled-Inductor Topologies for Transient Suppression

dc.contributor.authorSilva Thotabaddadurage S
dc.contributor.authorKularatna N
dc.contributor.authorSteyn-Ross DA
dc.description.abstract<jats:p>Based on the discovery of the surge absorption capability of supercapacitors, a transient protector named supercapacitor-assisted surge absorber (SCASA) was designed and implemented in a commercial device. Despite its simplicity, the circuit topology consisted of a coupled inductor wound around a specially selected magnetic core. This paper elucidates the design aspects of SCASA coupled-inductor topologies with a special focus on the magnetic action of core windings during transient propagation. The non-ideal operation of the SCASA transformer was studied based on a semi-empirical approach with predictions made by using magnetizing and leakage permeances. The toroidal flux distribution through the transformer was also determined for a 6 kV/3 kA combinational surge, and these findings were validated by using a lightning surge simulator. In predicting the possible effects of magnetic saturation, the hysteresis properties of different powdered-iron and ferrite core types were considered to select the optimal design for surge absorption. The test results presented in this research revealed that X-Flux powdered-iron toroid and air-gapped EER ferrite yielded exceptional performance with ∼10% and ∼20% lower load–voltage clamping compared to that of the existing Kool μu design. These prototypes further demonstrated a remarkable surge endurance, withstanding over 250 consecutive transients. This paper also covers details of three-winding design optimizations of SCASA and LTSpice simulations under the IEC 61000/IEEE C62.45 standard transient conditions.</jats:p>en
dc.identifier.citationSilva Thotabaddadurage S, Kularatna N, Steyn-Ross DA Magnetic Design Aspects of Coupled-Inductor Topologies for Transient Suppression. Electronics. 12(1). 246-246.en
dc.publisherMDPI AGen
dc.rightsAll rights reserved unless otherwise stateden
dc.subjecttransient absorptionen
dc.subjectmagnetic permeanceen
dc.subjectcoupled inductoren
dc.subjecttransformer modelingen
dc.subjectLTSpice simulationsen
dc.subjectpowdered ironen
dc.subject.anzsrcFields of Research::40 - Engineering::4008 - Electrical engineering::400807 - Engineering electromagneticsen
dc.subject.anzsrcFields of Research::40 - Engineering::4008 - Electrical engineering::400802 - Electrical circuits and systemsen
dc.titleMagnetic Design Aspects of Coupled-Inductor Topologies for Transient Suppressionen
dc.typeJournal Articleen
uc.collegeFaculty of Engineering
uc.departmentElectric Power Engineering Centre
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