Transformers made of composite magnetic cores: An innovative design approach

Kefalas, TD

dc.contributor.author	Kefalas, TD	en
dc.date.accessioned	2014-03-01T11:46:22Z
dc.date.available	2014-03-01T11:46:22Z
dc.date.issued	2009	en
dc.identifier.issn	18744761	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/37856
dc.subject	Composite magnetic cores	en
dc.subject	Distribution transformers	en
dc.subject	Finite element methods	en
dc.subject	Grain-oriented steel	en
dc.subject	No load losses	en
dc.subject	Optimization methods	en
dc.subject	Total owing cost	en
dc.subject	Wound cores	en
dc.subject.other	Composite magnetic core	en
dc.subject.other	Distribution transformer	en
dc.subject.other	Distribution transformers	en
dc.subject.other	Grain-oriented steel	en
dc.subject.other	No load	en
dc.subject.other	Optimization method	en
dc.subject.other	Optimization methods	en
dc.subject.other	Wound core	en
dc.subject.other	Cost reduction	en
dc.subject.other	Design	en
dc.subject.other	Electric load loss	en
dc.subject.other	Electric machinery	en
dc.subject.other	Finite element method	en
dc.subject.other	Magnetic circuits	en
dc.subject.other	Magnetic cores	en
dc.subject.other	Magnetic devices	en
dc.subject.other	Optimization	en
dc.subject.other	Patents and inventions	en
dc.subject.other	Magnetism	en
dc.title	Transformers made of composite magnetic cores: An innovative design approach	en
heal.type	other	en
heal.identifier.primary	10.2174/1874476110902010001	en
heal.identifier.secondary	http://dx.doi.org/10.2174/1874476110902010001	en
heal.publicationDate	2009	en
heal.abstract	Nowadays, transformers are made of conventional magnetic cores which are constructed of a single grainoriented or amorphous, magnetic steel. Even though, the transformer is the most efficient of electrical machines, with efficiencies typically above 90%, it is possible to improve transformer performance by using composite magnetic cores. Patents related to this simple and effective technique can be traced back to 1929. The specific technique can be applied to wound core distribution transformers. By using wound cores constructed with a combination of conventional and high permeability grain-oriented steel the total owing cost (TOC) of the transformer can be reduced effectively. This paper presents a brief review of patents on wound and composite magnetic cores and introduces a generalized technique for the determination of the optimum design variables of a new composite wound core design. © 2009 Bentham Science Publishers Ltd.	en
heal.journalName	Recent Patents on Electrical Engineering	en
dc.identifier.doi	10.2174/1874476110902010001	en
dc.identifier.volume	2	en
dc.identifier.issue	1	en
dc.identifier.spage	1	en
dc.identifier.epage	12	en