The influence of bounce parameters on the make erosion of silver/metal-oxide contact materials

Hetzmannseder, E.; Rieder, W.

doi:10.1109/holm.1993.489654

Cited by 5 publications

(1 citation statement)

References 2 publications

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“…This work was presented at the 45th IEEE Holm Conference on Electrical Contacts, October 3-7, 1999 doped AgSnO io6, and EMB8) showed low material transfer in both inductive and resistive loads. Make arc erosion and welding have been studied in previous papers at high electrical power [5]- [8]. In the automotive area, only one recent paper has investigated contact welding [9], and only a few papers deals with contact erosion [10], [11].…”

Section: Introductionmentioning

confidence: 99%

Make arc erosion and welding in the automotive area

Morin

Jemaa²,

Jeannot³

et al. 2000

IEEE Trans. Comp. Packag. Technol.

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A make arc has been investigated using a new testing apparatus. This apparatus which includes a piezo-translator, enables controlled bouncing to be studied at make under mechanical conditions similar to those encountered in automotive relays. Material transfer and welding tendency of silver, silver alloys and silver metal oxide contact materials have been studied under inductive, resistive and lamp loads at 14 V dc and 10-70 A.With all loads, anode to cathode material transfer has been observed. AgCdO, Ag and AgNi under lamp and resistive loads show the highest material transfer, as opposed to non doped and doped AgSnO 2 under inductive loads. This well known transfer is due to the anodic arc, which occurs during bounces when the gap between the contacts is shorter than 5 m, at the beginning and the end of the bounce.We have demonstrated that welding occurs in the beginning of the bounce, i.e. when the contacts begin to separate under arc, and not when the contacts close under arc at the end of the bounce. It was found that welding occurs mainly with Ag, AgCdO, AgZnO, AgFeRe, and AgFeOx contact materials, and under high inrush current produced by lamp loads.Index Terms-AgMeOx, arc bounce, automotive, contact material, make arc, material transfer, welding.

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Section: Introductionmentioning

confidence: 99%

Make arc erosion and welding in the automotive area

Morin

Jemaa²,

Jeannot³

et al. 2000

IEEE Trans. Comp. Packag. Technol.

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Thermodynamic analysis of erosion effects of silver-based metal oxide contact materials

Weise

Braumann²,

Wenzl³

Electrical Contacts - 1996. Proceedings of the Forty-Second IEEE Holm Conference on Electrical Contacts. Joint With the 18th In

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Basic Investigations on the Behavior of Advanced Ag/SnO2 Materials for Contactor Applications

Kratzschmar

Herbst

Mützel

et al. 2010

2010 Proceedings of the 56th IEEE Holm Conference on Electrical Contacts

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Higher power density and longer electrical lifetime at the same time are the main technical targets in development of contactors. Therefore, a close matching of contact material and switching device as well as the understanding of the material-device-interactions is necessary to achieve those demands. The paper will demonstrate the general influence of different material parameters based on Ag/SnO 2 in model switch tests and off-the-shelf contactors under various load conditions. The basic tendencies of the materials can be seen in both test series, but are partially counterbalanced by device specific effects like electrodynamic lift-off, unbalanced erosion between single pairs of contacts or the rise in contact resistance. Since under different load conditions welding, erosion and contact resistance vary, contact materials with 12-14% metal oxide content and special additives appeared to be the best choice for contactor development.

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The influence of bounce parameters on the make erosion of silver/metal-oxide contact materials

Cited by 5 publications

References 2 publications

Make arc erosion and welding in the automotive area

Make arc erosion and welding in the automotive area

Thermodynamic analysis of erosion effects of silver-based metal oxide contact materials

Basic Investigations on the Behavior of Advanced Ag/SnO2 Materials for Contactor Applications

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