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Paper Abstract and Keywords
Presentation 2014-01-31 16:10
Investigation of CDN with Transformer Used below 150 kHz
Nobuo Kuwabara, Hiromu Okumura (Kyushu Inst. of Tech.), Yuichiro Okugawa, Kazuhiro Takaya, Yoshiharu Akiyama (NTT) EMCJ2013-130
Abstract (in Japanese) (See Japanese page) 
(in English) Progress of energy saving mind makes a force employing electrical equipment with inverter and converter circuits. The problems of telecommunication equipment appear according to the increase of the equipment because the signal using these circuits is several ten kHz. This report presents the CDN (Coupling Decoupling Network) which is used to evaluate the immunity of the telecommunication equipment, such as ADSL and VDSL, in this frequency range. Large decoupling impedance is needed to satisfy the requirement of CDN in this frequency range. Therefore, CDN in this report uses a transformer to achieve a large impedance of the decoupling circuit. The CDNs used for AC mains port, 2W line port, and LAN port were developed and measured the characteristics. The results showed that the CDNs satisfied the requirement used for more than 150 kHz in the frequency range from 1kHz to 1MHz. The immunity test of the VDSL equipment used in the home was performed using these CDNs. The CW wave and the artificial disturbance which was created from the measurement results were used as the disturbance sources. The result showed that the VDSL equipment had an immunity below 640 kHz which is lower than the frequency band used by VDSL signal and the immunity at the 2W line port is 1/3 compared to the immunity at the other ports.
Keyword (in Japanese) (See Japanese page) 
(in English) Immunity / Inverter / Low frequency range / CDN / Transformer / / /  
Reference Info. IEICE Tech. Rep., vol. 113, no. 423, EMCJ2013-130, pp. 111-116, Jan. 2014.
Paper # EMCJ2013-130 
Date of Issue 2014-01-23 (EMCJ) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
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All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
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Conference Information
Committee EMCJ WPT  
Conference Date 2014-01-30 - 2014-01-31 
Place (in Japanese) (See Japanese page) 
Place (in English) Saga Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Communication, Wireless power transmission, EMC, etc. 
Paper Information
Registration To EMCJ 
Conference Code 2014-01-EMCJ-WPT 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Investigation of CDN with Transformer Used below 150 kHz 
Sub Title (in English)  
Keyword(1) Immunity  
Keyword(2) Inverter  
Keyword(3) Low frequency range  
Keyword(4) CDN  
Keyword(5) Transformer  
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Keyword(8)  
1st Author's Name Nobuo Kuwabara  
1st Author's Affiliation Kyushu Institute of Technology (Kyushu Inst. of Tech.)
2nd Author's Name Hiromu Okumura  
2nd Author's Affiliation Kyushu Institute of Technology (Kyushu Inst. of Tech.)
3rd Author's Name Yuichiro Okugawa  
3rd Author's Affiliation Nippon Telegraph and Telephone Corporation (NTT)
4th Author's Name Kazuhiro Takaya  
4th Author's Affiliation Nippon Telegraph and Telephone Corporation (NTT)
5th Author's Name Yoshiharu Akiyama  
5th Author's Affiliation Nippon Telegraph and Telephone Corporation (NTT)
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Speaker Author-1 
Date Time 2014-01-31 16:10:00 
Presentation Time 25 minutes 
Registration for EMCJ 
Paper # EMCJ2013-130 
Volume (vol) vol.113 
Number (no) no.423 
Page pp.111-116 
#Pages
Date of Issue 2014-01-23 (EMCJ) 


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