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Paper Abstract and Keywords
Presentation 2018-01-19 10:20
PWM signal generation method to reduce impulse noise
Takeharu Kohri, Masakatsu Ogawa (Sophia), Yuichiro Okugawa, Yoshiharu Akiyama (NTT) EMCJ2017-97
Abstract (in Japanese) (See Japanese page) 
(in English) Pulse Width Modulation (PWM) control used in an inverter to drive a motor consists of switching devices such as Insulated Gate Bipolar Transistor (IGBT), and the impulse noise occurs by the switching operation of such devices. The negative impact of the impulse noise is the communication quality degradation at communication devices existing near the source of the impulse noise. Since the number of switching operations concerns the occurrence frequency of impulse noise, we have to reduce the number of switching operations of PWM. We focus on PWM with duty ratio of 50% when the drive signal is 0V. In such a case, there is no problem even if the carrier frequency sets to lower frequency. At first, we describe the principle of PWM generation method to reduce the number of switching operations. Next, we propose the following three carrier frequency changing methods used for PWM, Carrier frequency changing method by phase position of drive signal, Carrier frequency changing method by level of drive signal and Carrier frequency changing method by according to power supplied to load. Among three our proposal, Carrier frequency changing method by according to power supplied to load is the most effective.
Keyword (in Japanese) (See Japanese page) 
(in English) PWM / Inverter / Carrier Frequency / / / / /  
Reference Info. IEICE Tech. Rep., vol. 117, no. 384, EMCJ2017-97, pp. 55-59, Jan. 2018.
Paper # EMCJ2017-97 
Date of Issue 2018-01-11 (EMCJ) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380
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  
Conference Date 2018-01-18 - 2018-01-19 
Place (in Japanese) (See Japanese page) 
Place (in English)  
Topics (in Japanese) (See Japanese page) 
Topics (in English) Communication, PCB, Information Security, EMC 
Paper Information
Registration To EMCJ 
Conference Code 2018-01-EMCJ 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) PWM signal generation method to reduce impulse noise 
Sub Title (in English)  
Keyword(1) PWM  
Keyword(2) Inverter  
Keyword(3) Carrier Frequency  
1st Author's Name Takeharu Kohri  
1st Author's Affiliation Sophia University (Sophia)
2nd Author's Name Masakatsu Ogawa  
2nd Author's Affiliation Sophia University (Sophia)
3rd Author's Name Yuichiro Okugawa  
3rd Author's Affiliation NTT Network Technology Laboratories (NTT)
4th Author's Name Yoshiharu Akiyama  
4th Author's Affiliation NTT Energy and Environment Systems Laboratories (NTT)
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Date Time 2018-01-19 10:20:00 
Presentation Time 25 
Registration for EMCJ 
Paper # IEICE-EMCJ2017-97 
Volume (vol) IEICE-117 
Number (no) no.384 
Page pp.55-59 
#Pages IEICE-5 
Date of Issue IEICE-EMCJ-2018-01-11 

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