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.
雑誌名
Magnetics Society of Japan
巻
37
号
3-2
ページ
151 - 154
発行年
2013-03-15
出版者
日本磁気学会
出版者別言語
Magnetics Society of Japan
ISSN
18822924
EISSN
18822932
DOI
10.3379/msjmag.1303R012
権利
c 2013 The Magnetics Society of Japan
著者版フラグ
author
引用
Magnetics Society of Japan, 37(3-2), pp.151-154; 2013
Reduction in eddy current loss for a power coupler in an electrodeless discharged lamp
JMSJ37_151.pdf
(284.72KB)
NAOSITEについて