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Study on Generation Mechanism of Radio-Wave Noise in High Speed Sliding-Contacts and Reduction Method

Research Project

Project/Area Number 01550330
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field 計測・制御工学
Research InstitutionNagoya Institute of Technology

Principal Investigator

FUJIWARA Osamu  Faculty of Engineering, Nagoya Institute of Technology, Associate Professor, 工学部, 助教授 (60135316)

Project Period (FY) 1989 – 1990
Project Status Completed (Fiscal Year 1990)
Budget Amount *help
¥1,900,000 (Direct Cost: ¥1,900,000)
Fiscal Year 1990: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1989: ¥1,300,000 (Direct Cost: ¥1,300,000)
KeywordsCurrent Collecting System / Discontact Phenomena / Radio-Wave Noise / SlidingーContacts / Discontact rate / Discharge rate / Statistical Measurement / パンタグラフ集電系
Research Abstract

In preserving the electromagnetic environment along railways it is important to reduce the levels of electromagnetic noises caused by the discontact phenomenon between the pantograph and trolley wire. However no effective measures for the noise reduction have been available at the present time because of the complexities of the discontact phenomenon. If this phenomenon could be elucidated using the sliding-contacts which is well-known as an experimental model of the pantograph current-collection system, it is possible to find out drastic means for suppressing the radio-frequency noises. In this study the discontact parameters were introduced for quantifying the occurrence situations of the mechanical discontact and electrical discharge appearing in the sliding-contacts, and through statistical measurements of these parameters attempt was made to elucidate the complex discontact phenomenon. The following results were obtained : As for the discontact parameters both the occurrence time-r … More ates of the discontact and discharge were used and simultaneous measurements of the above parameters were conducted using the brass sliding-contacts and the newly developed equipment with a personal computer. As a result it was found that both the discontact and discharge rates fluctuate approximately according to the normal probability distributions and when the sliding-speed and contact load are kept constant the discontact rate decreases with increasing the contact current, while the discharge rates increase, and also that the sum of the occurrence time-rates of the discontacts and discharges does not depend upon the contact current and this value unexpectedly agrees with the mechanical discontact rate without the contact current. Among the above results the inherent relationship holding between the discontact and discharge rates was also confirmed in the carbon sliding-contacts. It was, therefore, concluded that the discontact phenomenon can be quantified by the inherent properties described above. At present measurements of the occurrence frequencies of the discontact and discharge are conducted for investigating the properties peculiar to the sliding-contacts. Less

Report

(3 results)
  • 1990 Annual Research Report   Final Research Report Summary
  • 1989 Annual Research Report
  • Research Products

    (22 results)

All Other

All Publications (22 results)

  • [Publications] S.Tsukamoto,O.Fujiwara,T.Azakami: "Occurrence frequencies of mocroarcs caused by carbon slidingーcontacts" Trans.IEICE Japan (電子情報通信学会英文論文誌). E71. 278-279 (1988)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] S.Tsukamoto,O.Fujiwara,T.Azakami: "Curentーdependencies of discontact properties in slidingーcontacts" Trans.IEICE Japan (電子情報通信学会英文論文誌). E72. 346-347 (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] S.Tsukamoto,O.Fujiwara,T.Azakami: "Quantification measurement of discontact phenomena in slidingーcontacts" Trans.IEICE Japan (電子情報通信学会英文論文誌). E73. 1156-1157 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] 藤原 修,塚本 総一,阿座上 孝: "しゅう動接点において生ずる離線現象の固有特性" 電子情報通信学会論文誌. J73ーCーII. 852-858 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] 塚本 総一,藤原 修,阿座上 孝: "摺動接点における離線統計量の分離測定" 電子情報通信学会技術研究報告(環境電磁工学研究会). EMCJ88ー49. 43-48 (1988)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] 塚本 総一,藤原 修,阿座上 孝: "摺動接点において現われる離線現象の固有特性" 電子情報通信学会技術研究報告(環境電磁工学研究会). EMCJ89ー50. 105-110 (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] S. Tsukamoto, O. Fujiwara and T. Azakami: "Occurrence frequencies of microarcs caused by carbon sliding-contacts" Trans. IEICE Japan. E71. 278-279 (1988)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] S. Tsukamoto, O. Fujiwara and T. Azakami: "Currentーdependencies of discontact properties in sliding-contacts" Trans. IEICE Japan. E72. 346-347 (1989)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] S. Tsukamoto, O. Fujiwara and T. Azakami: "Quantification measurement of discontact phenomena in sliding-contacts" Trans. IEICE Japan. E73. 1156-1157 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] O. Fujiwara, S. Tsukamoto and T. Azakami: "Intrinsic properties of discontact phenomena occurring in sliding-contacts" Trans. IEICE Japan. J73CII. 852-858 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] S. Tsukamoto, O. Fujiwara, Kazuo Katoh and T. Azakami: "Statistical properties of discontact phenomena in sliding-contacts" IEICE Technical Report. EMCJ88-49. 43-48 (1988)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] S. Tsukamoto, O. Fujiwara and T. Azakami: "Inherent properties of discontact phenomena appearing in sliding-contacts" IEICE Technical Report. EMCJ88-50. 105-110 (1989)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] S.Tsukamoto,O.Fujiwara,T.Azakami: "Occurrence frequencies of mocroarcs caused by carbon slidingーcontacts" Trans,IEICE Japan(電子情報通信学会英文論文誌). E71. 278-279 (1988)

    • Related Report
      1990 Annual Research Report
  • [Publications] S.Tsukamoto,O.Fujiwara,T.Azakami: "Currentーdependencies of discontact properties in slidingーcontacts" Trans.IEICE Japan(電子情報通信学会英文論文誌). E72. 346-347 (1989)

    • Related Report
      1990 Annual Research Report
  • [Publications] S.Tsukamoto,O.Fujiwara,T.Azakami: "Quantification measurement of discontact phenomena in slidingーcontacts" Trans.IEICE Japan(電子情報通信学会英文論文誌). E73. 1156-1157 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] 藤原 修,塚本 総一,阿座上 孝: "しゅう動接点において生ずる離線現象の固有特性" 電子情報通信学会論文誌. J73ーCーII. 852-858 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] 塚本 総一,藤原 修,阿座上 孝: "摺動接点における離線統計量の分離測定" 電子情報通信学会技術研究報告(環境電磁工学研究会). EMCJ88ー49. 43-48 (1988)

    • Related Report
      1990 Annual Research Report
  • [Publications] 塚本 総一,藤原 修,阿座上 孝: "摺動接点において現われる離線現象の固有特性" 電子情報通信学会技術研究報告(環境電磁工学研究会). EMCJ89ー50. 105-110 (1989)

    • Related Report
      1990 Annual Research Report
  • [Publications] Osamu Fujiwara,Kohji Yamashita,Takashi Azakami: "A Proposal for Estimating Pantagraph Discharge Rate Using Noise Current" Proceeding of 8th Symposium on Electromagnetic Comapatibility,Zurch,Switzerland. 8. pp.441-445 (1989)

    • Related Report
      1989 Annual Research Report
  • [Publications] Souichi Tsukamoto,Osamu Fujiwara,Takashi Azakami: "CurrentーDependences of Discontact Properties in SlidingーContacts" The Transactions of th IEICE. E72. pp.346-347 (1989)

    • Related Report
      1989 Annual Research Report
  • [Publications] 山下,藤原,阿座上: "雑音電流の統計的性質を利用する離線率推定の一提案" 電子情報通信学会論文誌. J72ーCーII. pp.715-721 (1989)

    • Related Report
      1989 Annual Research Report
  • [Publications] 塚本,藤原,阿座上: "摺動接点において現われる離線現象の固有特性" 電子情報通信学会環境電磁工学研究会技術資料. 89. pp.105-110 (1989)

    • Related Report
      1989 Annual Research Report

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Published: 1989-04-01   Modified: 2016-04-21  

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