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Research on Electrical Conduction Mechanism and Withstand Voltage Properties after Current Limiting of PTC (Positive Temperature Coefficient ) Device

Research Project

Project/Area Number 14350147
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field 電力工学・電気機器工学
Research InstitutionKyusyu Institute of Technology

Principal Investigator

HIKITA Masayuki  Kyusyu Institute of Technology, Faculty of Engineering, Professor, 工学部, 教授 (40156568)

Co-Investigator(Kenkyū-buntansha) MENGU Cho  Kyusyu Institute of Technology, Faculty of Engineering, Professor, 工学部, 教授 (60243333)
OHTSUKA Shinya  Kyusyu Institute of Technology, Faculty of Engineering, Assistant Professor, 工学部, 助手 (60315158)
Project Period (FY) 2002 – 2004
Project Status Completed (Fiscal Year 2004)
Budget Amount *help
¥13,100,000 (Direct Cost: ¥13,100,000)
Fiscal Year 2004: ¥3,000,000 (Direct Cost: ¥3,000,000)
Fiscal Year 2003: ¥2,800,000 (Direct Cost: ¥2,800,000)
Fiscal Year 2002: ¥7,300,000 (Direct Cost: ¥7,300,000)
Keywordspositive temperature coefficient property / ceramic PTC / current limiting device / withstand voltage improvement / switching / ポリマコンポジット
Research Abstract

Positive temperature coefficient(PTC) devices are now used as over-current limiting device for secondary batteries of small electronic apparatuses such as mobile phone, note type personal computer and video camera. A number of PTC devices used at present have various issues to be tackled on improvement of withstand voltage after current limiting action, optimum composition of materials, electrode materials and the configuration etc. Aim of this project is to elucidate electrical conduction mechanism in high resistance region and the influence of partial discharges on the current limiting properties of ceramic type PTC devices, which are expected to have higher current rating and limiting voltage than conventional PTC devices such as polyethylene type and barium titanate type PTC devices. Besides, we proposed a new type hybrid PTC device where liquid or gel material is used as a matrix and solid conducting particles are used as filler, and performed experiments to verify the principle o … More f operation. Namely, the PTC device is proposed where on short circuit event the conducting particles are evaporated and dissipated to perform current limiting operation, and then dielectrophoresis force allows automatic collection of the conducting particles efficiently to realize switching on the circuit again. We made an application for patent for the new hybrid PTC decive.
We measured resistance-temperature relation and current-voltage relation for 6 kinds of ceramic type PTC devices with different filler amounts and different ratios of gas content H_2 and N_2 on burning to form ceramic. Then, we compared the ratio of resistance jump from on-state to off-state of the ceramic type PTC devices, and the resistance after returning to on-state and the transition voltage. As a result, it was found that the higher the H_2 gas content on burning, the larger the resistance jump ratio and the transition voltage. Besides, as the filler amount increased, the transition voltage increased. It was also indicated that tunneling current or ionic hopping current is attributed to the conduction mechanism of ceramic type PTC device. It was also confirmed that on applying ac voltage to the PTC device, partial discharges took place. It was found that the instantaneous discharge inception voltage corresponded to the voltage giving the degradation of the return resistance on backing to on-state, suggesting the bad influence of partial discharges on the return resistance degradation. Less

Report

(4 results)
  • 2004 Annual Research Report   Final Research Report Summary
  • 2003 Annual Research Report
  • 2002 Annual Research Report
  • Research Products

    (8 results)

All 2004

All Journal Article (7 results) Patent(Industrial Property Rights) (1 results)

  • [Journal Article] Switching Phenomena of a New Type PTC Device as a Reusable Current-limiting Fuse Operated by Dielectrophoresis2004

    • Author(s)
      S.Ohtsuka
    • Journal Title

      2004 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (CEIDP2004)

      Pages: 592-595

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] 誘電泳動現象を用いた自己回復性スイッチング素子開発に関する検討2004

    • Author(s)
      安倍俊富
    • Journal Title

      第35回電気電子絶縁材料システムシンポジウム予稿集

      Pages: 177-180

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Annual Research Report 2004 Final Research Report Summary
  • [Journal Article] 誘電泳動力による自己修復性限流ヒューズのスイッチング動作検証とOn-Off抵抗特性の検討2004

    • Author(s)
      安倍俊富
    • Journal Title

      第57回電気関係学会九州支部連合大会論文集

      Pages: 83-83

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Annual Research Report 2004 Final Research Report Summary
  • [Journal Article] Switching Phenomena of a New Type PTC Device as a Reusable Current-limiting Fuse Operated by Dielectrophoresis Phenomena2004

    • Author(s)
      S.Ohtsuka
    • Journal Title

      2004 Annual Report Conference on Electrical Insulation and Dielectric(CEIDP2004)

      Pages: 592-595

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Investigation of Self-recovering Switching Device Development by Dielectrophoresis Phenomena2004

    • Author(s)
      T.Abe
    • Journal Title

      Proc.of the 35th Symposium on Electrical and Electronic Insulating Materials and Applications in Systems

      Pages: 177-180

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Investigation on Switching Operation of Self-recovering Current Limit Fuse by Dielectrophoresis Force and on-off Resistance Properties2004

    • Author(s)
      T.Abe
    • Journal Title

      Record of 57^<th> Joint Conference of Electrical and Electronics Engineers in Kyushu

      Pages: 83-83

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Switching Phenomena of a New Type PTC Device as a Reusable Current-limiting Fuse Operated by Dielectrophoresis2004

    • Author(s)
      Shinya Ohtsuka
    • Journal Title

      2004 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (CEIDP2004)

      Pages: 529-595

    • Related Report
      2004 Annual Research Report
  • [Patent(Industrial Property Rights)] 特許権2004

    • Inventor(s)
      大塚 信也, 匹田 政幸
    • Industrial Property Rights Holder
      大塚 信也, 匹田 政幸
    • Industrial Property Number
      2004-249481
    • Filing Date
      2004-08-30
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Annual Research Report 2004 Final Research Report Summary

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Published: 2002-04-01   Modified: 2016-04-21  

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