<?xml encoding="utf-8" version="1.0"?>
<item><contributor.author>Su, Y</contributor.author>
<contributor.author>Liu, X</contributor.author>
<contributor.author>Lee, CK</contributor.author>
<contributor.author>Hui, SY</contributor.author>
<creator>jt 130319</creator>
<date.accessioned>2012-08-08T08:35:08Z</date.accessioned>
<date.available>2012-08-08T08:35:08Z</date.available>
<date.issued>2012</date.issued>
<identifier.citation>IEEE Transactions on Power Electronics, 2012, v. 27 n. 6, p. 3050-3056</identifier.citation>
<identifier.issn>0885-8993</identifier.issn>
<identifier.uri>http://hdl.handle.net/10722/155744</identifier.uri>
<description.abstract>The principle of using hollow spiral winding is not novel, but the study on this topic is far from complete. In this paper, how hollow the central region of the coreless printed spiral winding (CPSW) inductor should be for a given footprint area in order to achieve the maximal quality factor Q max and to maintain high inductance value is explored. A hollow factor based on the ratio of the inner hollow radius and the outer winding radius &#964; = R in/R out, is proposed as for optimization and quantifying how hollow a spiral winding is. The relationship between &#964; and Q max, which depends on the operating frequency and the dimensional parameters of CPSW inductor, is established. For a specific operating frequency, it is discovered that if the conductor width is comparable with the skin depth, or the conductors are placed relatively far away from each others, the hollow design of the CPSW inductor has little improvement on Q but reduces the inductance. If the conductor width is much larger than the skin depth and the conductors are closely placed, the hollow spiral design is recommended. The optimal range of &#964; with which the Q max can be achieved is found to be around 0.45-0.55. &#169; 2006 IEEE.</description.abstract>
<language>eng</language>
<publisher>IEEE.</publisher>
<relation.ispartof>IEEE Transactions on Power Electronics</relation.ispartof>
<rights>IEEE Transactions on Power Electronics. Copyright &#169; IEEE</rights>
<rights>&#169;2012 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.</rights>
<rights>Creative Commons: Attribution 3.0 Hong Kong License</rights>
<subject>Planar Magnetics</subject>
<subject>Quality Factor</subject>
<title>On the relationship of quality factor and hollow winding structure of coreless printed spiral winding (CPSW) inductor</title>
<type>Article</type>
<description.nature>published_or_final_version</description.nature>
<identifier.doi>10.1109/TPEL.2011.2174654</identifier.doi>
<identifier.scopus>eid_2-s2.0-84859090171</identifier.scopus>
<identifier.hkuros>205581</identifier.hkuros>
<relation.references>http://www.scopus.com/mlt/select.url?eid=2-s2.0-84859090171&amp;selection=ref&amp;src=s&amp;origin=recordpage</relation.references>
<identifier.volume>27</identifier.volume>
<identifier.issue>6</identifier.issue>
<identifier.spage>3050</identifier.spage>
<identifier.epage>3056</identifier.epage>
<identifier.isi>WOS:000302184600034</identifier.isi>
<publisher.place>United States</publisher.place>
<bitstream.url>http://hub.hku.hk/bitstream/10722/155744/1/Content.pdf</bitstream.url>
</item>