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Reduction in eddy current loss for a power coupler in an electrodeless discharged lamp


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Title: Reduction in eddy current loss for a power coupler in an electrodeless discharged lamp
Authors: Yanai, Takeshi / Sakamoto, Y. / Nakano, Masaki / Kakehashi, H. / Okada, A. / Fukunaga, Hirotoshi
Issue Date: 15-Mar-2013
Publisher: 日本磁気学会 / Magnetics Society of Japan
Citation: Magnetics Society of Japan, 37(3-2), pp.151-154; 2013
Abstract: We investigated reduction in an eddy current loss for a power coupler in an electrodeless discharged lamp with our previously proposed analysis method for plasma in the lamp. We confirmed that a large eddy current flow was observed at the top of an Al stage in the power coupler and the loss was reduced by a decrease in the height of the Al stage. This result suggests that a decrease in the height is effective to reduce wasted power losses and implies the possibility of an improvement in the lamp efficiency. We also confirmed that upward-moving and moderate-elongation of the ferrite core in the power coupler is effective to reduce the wasted loss. In order to verify the result, we evaluated the lamp efficiency of a lamp with a modified power coupler. Resultantly, the lamp efficiency was increased by approximately 3 lm/W (lumen per Watt). Therefore, we can conclude that reducing the eddy current loss in the power coupler is one of the important factors to obtain high lamp efficiency.
Keywords: electrodeless discharged lamp / inductively-coupled plasma / high frequency excitation
URI: http://hdl.handle.net/10069/34649
ISSN: 18822924
DOI: 10.3379/msjmag.1303R012
Rights: © 2013 The Magnetics Society of Japan
Type: Journal Article
Text Version: author
Appears in Collections:Articles in academic journal

Citable URI : http://hdl.handle.net/10069/34649

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