A study on the current and radiation noise from 30M to 3G Hz generated by slowly breaking silver compound contacts

Tatsuya Nakamura, Kazuaki Miyanaga, Yoshiki Kayano, Hiroshi Inoue

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    3 Citations (Scopus)

    Abstract

    An arc discharge generated by breaking electrical contact is considered as a main source of an undesired electromagnetic (EM) noise. The current and radiation noise from 30M to 3G Hz generated by slowly breaking silver compound contacts were investigated experimentally in order to clarify mechanisms of generation of the EM noise. It was demonstrated that frequency responses of the current and radiation noise are corresponding to circuit admittance and radiation efficiency of experimental setup. Current noise at lower frequencies band (10MHz) was largest in the measured frequency range. Although current noise above 100MHz decreases, radiation noise increases as the frequency increases. It was demonstrated that even if current noise at GHz band is very small, slight current noise can cause large radiation noise because of the high radiation efficiency. Time-frequency domain characteristics of current noise also were studied in order to clarify the correspondence of noise generation to contact breaking phenomena. The peaks of current noise at 10MHz band arise when immediately after the initiation of arc discharge and transition from metallic phase to gaseous phase. The peak of current noise above 100MHz arises when just after the initiation of arc discharge. This study is a basic consideration to realize methods for good electromagnetic compatibility design for electrical contacts.

    Original languageEnglish
    Title of host publication23rd International Conference on Electrical Contacts, ICEC 2006 - together with the 6th International Session on Electromechanical Devices, IS-EMD 2006
    Publication statusPublished - 2006
    Event23rd International Conference on Electrical Contacts, ICEC 2006 - Sendai, Japan
    Duration: 2006 Jun 62006 Jun 9

    Publication series

    Name23rd International Conference on Electrical Contacts, ICEC 2006 - together with the 6th International Session on Electromechanical Devices, IS-EMD 2006

    Other

    Other23rd International Conference on Electrical Contacts, ICEC 2006
    CountryJapan
    CitySendai
    Period06/6/606/6/9

    Keywords

    • Arc discharge
    • Current noise
    • GHz band
    • Radiation noise
    • Slow break

    ASJC Scopus subject areas

    • Electrical and Electronic Engineering
    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics

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