A model to describe intermittency phenomena in electrical connectors

Fretting is known to be a major cause of contact deterioration and failure, particularly in tin-plated contacts. During fretting the contact resistance generally increases slowly with time. Superimposed to this slow increase in contact resistance are rapid changes in contact resistance within fractions of a second, called intermittences or short duration discontinuities. High-speed measurements of contact voltage-drop and contact current have been carried out and the results are evaluated using general contact theory. It is shown that sudden changes in contact resistance can be caused by a surface film and by melting of current carrying asperities.

[1]  C. Maul,et al.  Influences on the length and severity of intermittences in electrical contacts , 2000, Electrical Contacts - 2000. Proceedings of the Forty-Sixth IEEE Holm Conference on Electrical Contacts (Cat. No.00CB37081).

[2]  Christian Maul.  Intermittent electrical discontinuities in tin-plated automotive contacts , 2001 .

[3]  A. Lee,et al.  Fretting corrosion of Tin-plated copper alloy , 1987 .

[4]  Jonathan Swingler,et al.  Measuring intermittences in electrical contacts , 2000 .

[5]  R. Holm.  Electric contacts; theory and application , 1967 .

[6]  C. N. Neufeld,et al.  Carbon contamination of contacts due to organic vapors , 1995 .

[7]  J. Minuth,et al.  A new test equipment for high dynamic real-time measuring of contact resistances , 1999, Electrical Contacts - 1999. Proceedings of the Forty-Fifth IEEE Holm Conference on Electrical Contacts (Cat. No.99CB36343).

[8]  S.R. Murrell,et al.  Intermittence detection in fretting corrosion studies of electrical contacts , 1997, Electrical Contacts - 1997 Proceedings of the Forty-Third IEEE Holm Conference on Electrical Contacts.

[9]  W. Abbott.  Time Distribution of Intermittents Versus Contact Resistance for Tin-Tin Connector Interfaces During Low Amplitude Motion , 1984 .

[10]  Jonathan Swingler,et al.  On the nature of intermittences in electrical contacts , 2000 .

[11]  C. N. Neufeld,et al.  Electrical characteristics of various contact contaminations , 1995 .

[12]  Jonathan Swingler,et al.  Intermittency phenomena in electrical connectors , 2001 .

[13]  A. Lee,et al.  Fretting corrosion of tin at elevated temperatures , 1988, Electrical Contacts, 1988., Proceedings of the Thirty Fourth Meeting of the IEEE Holm Conference on Electrical Contacts.

[14]  R.D. Malucci,et al.  Possible mechanism for observed dynamic resistance , 2000, Electrical Contacts - 2000. Proceedings of the Forty-Sixth IEEE Holm Conference on Electrical Contacts (Cat. No.00CB37081).

[15]  M. Antler,et al.  Recovery of severely degraded tin-lead plated connector contacts due to fretting corrosion , 1997, Electrical Contacts - 1997 Proceedings of the Forty-Third IEEE Holm Conference on Electrical Contacts.