"Electrical arc phenomena and its interaction on contact material at 42 volts DC for automotive applications"

Doublet, L.; Jemaa, N. Ben; Hauner, F.; Jeannot, D.

doi:10.1109/holm.2004.1353087

Cited by 26 publications

(16 citation statements)

References 3 publications

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“…Figure 1 shows the arc duration curves for silver contacts versus wide current range (0.1 to 130A) at 14, 42, 112 and 360VDC in resistive load. These results were obtained with the experimental electrical testing device described in previous papers [4] and briefly reminded §2.1.2. Each curve has two parts: a first segment obeys to a power law with a high slope I 4 and is followed by a flatten section.…”

Section: What Are the Consequences Of An Increase In Current And / Ormentioning

confidence: 99%

“…These results were obtained with the experimental electrical testing device described in previous papers [4] and briefly reminded §2.1.2. Each curve has two parts: a first segment obeys to a power law with a high slope I 4 and is followed by a flatten section. Let us consider the curve for 42VDC.…”

Section: What Are the Consequences Of An Increase In Current And / Ormentioning

confidence: 99%

“…5), adapted to perform contact breaking under 14 VDC up to 360 VDC. This device has been described in details in previous papers [4,5]. In this paper, most experiments were performed under 42VDC and with a resistive load, at opening speed of 20cm/s, i.e.…”

Section: Electrical Characterization By Break Arc Durationmentioning

confidence: 99%

“…The faster the separation, the stronger the current decrease. However, care should be taken in inductive load where the time constant of the inductance plays an opposite role and may increase arc duration at high speed [4,12] …”

Section: Kinematicsmentioning

confidence: 99%

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New contact material for reduction of arc duration for dc application

Doublet¹,

Jemaa

Rivoirard

et al. 2010

Eur. Phys. J. Appl. Phys.

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:The phenomenon of arcing is the major cause of electrical contact degradation in electrical switches. Degradation involves contact erosion and/or welding. The use of special contact material and that of specific material processing may permit contact erosion to be reduced, in particular by shortening the arc duration. A short review of these approaches is presented in the first part of this paper. In the second part, the development of a new self-blowing contact material is described. This material has been tested under DC voltages from 14 V to 42 V. A reduction of the arc duration by a factor of 4 approximately was obtained as was a concomitant reduction of the extinction gap to less than 2 mm. This material will contribute to achieving better reliability in high current-high voltages breaking devices, and will aid in their miniaturization, e.g. in relays.

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Section: What Are the Consequences Of An Increase In Current And / Ormentioning

confidence: 99%

Section: What Are the Consequences Of An Increase In Current And / Ormentioning

confidence: 99%

Section: Electrical Characterization By Break Arc Durationmentioning

confidence: 99%

Section: Kinematicsmentioning

confidence: 99%

See 2 more Smart Citations

New contact material for reduction of arc duration for dc application

Doublet¹,

Jemaa

Rivoirard

et al. 2010

Eur. Phys. J. Appl. Phys.

Self Cite

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show abstract

“…These gaseous ions are attracted to the cathode, sputter it, and then cause erosion of the cathode surface resulting in a net transfer of material from the cathode to the anode. Often, studies into the behavior of these materials at different voltages have involved a comparison of the level of erosion on the contact surfaces [6][7][8][9][10][11]. This approach describes the end result of an opening (break) operation that gives different erosion profiles depending upon materials, opening characteristics, and circuit parameters.…”

Section: Introductionmentioning

confidence: 99%

Arc erosion of AgSnO2 electrical contacts at different stages of a break operation

Swingler

Sumption

2010

Rare Metals

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Arc erosion studies are conducted on AgSnO 2 contact materials at different stages in the break operation. A resistive load arrangement is used with up to 42 V DC at 24 A and a constant contact opening velocity. The arc current is terminated at different stages as the arc is drawn between the contacts enabling a study of the arcing phenomena up to that point. Surface profiling of the contacts is conducted to determine the extent of erosion at the different stages as the arc is drawn. Spectral analysis is also conducted on the arc and then related to the extent of erosion. The results show that particular features occur at different stages as the arc is drawn. As the arc is initially established, it goes through an "Arc Generation" regime where the arc roots are small and immobile on both the anode and the cathode. Material transfer occurs mainly from anode to cathode. The spectral analysis indicates that Sn and O species dominate the arc followed by the Ag species. As the arc is drawn further and enters the "Arc Degeneration" regime, the anode undergoes significantly larger erosion than the cathode. Also, both contacts indicate that multiple arc roots have formed, which are highly mobile in the later stages of the discharge. The spectral analysis indicates that Ag and N species are in high concentrations compared to other species. The mechanisms of erosion and deposition are discussed in relation to the species within the arc discharge. For the complete break operation, it is found that the anode undergoes major erosion, and it is thought that the gaseous ions species do not dominate the arc under these conditions of short arcs and voltage <42 V to cause cathode erosion.

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