Break arc study for the new electrical level of 42 V in automotive applications

Jemaa, N. Ben; Doublet, L.; Morin, L.; Jeannot, D.

doi:10.1109/holm.2001.953189

Cited by 23 publications

(16 citation statements)

References 5 publications

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“…Panode Ja X (Va + () + VT) + Pn + Pr (2) where Ja is the anode current density, Va the anode voltage drop, io the material work function, PR the result of the energy of neutral atoms and Pr the radiant energy from the column. Usually the two last parts of equation 2 are negligible in comparison with the first part, VT results of electron column flux.…”

Section: B Anode Energy Fluxmentioning

confidence: 99%

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Theoretical and experimental determination of erosion rate due to arcing in electrical contacts

Abbaoui

Lefort

Sallais³

et al. 2006

Electrical Contacts - 2006. Proceedings of the 52nd IEEE Holm Conference on Electrical Contacts

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Erosion rate of electrical contacts is a very important parameter to understanding and evaluating the performances of contact materials and switching devices such as the life time. The most common measurement of arc erosion is the mass change of the contacts, determined by the weighing of the anode and the cathode, before and after the electrical tests. The erosion is well known to be a transfer from the anode to the cathode then from the cathode to the anode and finally a bilateral loss takes place. In this work, and to avoid the transfer phenomena, the mass of electrode after a large number of breaking operations is performed in the domain of bilateral erosion of the anode and cathode. Calculation of the evaporated mass by finite element simulation of thermal input and heat transfer to the electrode from the arc is made. It is found that the evaporated amount per unit of duration arc is in agreement for silver materials but for metal oxide it needs the knowledge of material properties and namely data of physical heat conduction.

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Section: B Anode Energy Fluxmentioning

confidence: 99%

“…The experimental apparatus is a fully automated device which has been widely described in previous papers [1,2].…”

Section: A Test Equipment and Proceduresmentioning

confidence: 99%

Theoretical and experimental determination of erosion rate due to arcing in electrical contacts

Abbaoui

Lefort

Sallais³

et al. 2006

Electrical Contacts - 2006. Proceedings of the 52nd IEEE Holm Conference on Electrical Contacts

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“…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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“…Indeed, basic investigations on arcing phenomena in automotive relay applications were performed first, at 14VDC [1,2] and more recently, at 42VDC [3][4][5][6]. As regards connectors, investigations have been made and are still in progress [7,8,9].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of arcing damage on connector for 42V automotive power net

Razafiarivelo¹,

Porte²,

Jemaa³

et al.

Proceedings of the 50th IEEE Holm Conference on Electrical Contacts and the 22nd International Conference on Electrical Contact

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The conversion of the power network system voltage from 14 VDC to 42 VDC is accompanied by a discontinuous change of arcing energy produced during live intentional or accidental unplugging. This necessitates a modification of electrical breaking and connecting devices. For the connectors, it results in adding the capability of withstanding arcing during live disconnection to the basic characteristics of high conduction and low insertion effort. To quantify this new capability and the correlated level of arc damage, the authors propose to correlate the insertion criteria "insertion force" with the parameters "arc energy" and current level. Compared with our previous work, the introduction of the current parameter allows us to attribute the origin of the damage to the connector to the overheating of the contacts by heat conduction mechanisms supplied by the arc. As intermediate results, the influence of the opening speed and the contact coating on the arc energy increase is confirmed. The obtained results will help to characterize and to select arcresistant interconnection solutions in the field of the high power automotive applications.

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Break arc study for the new electrical level of 42 V in automotive applications

Cited by 23 publications

References 5 publications

Theoretical and experimental determination of erosion rate due to arcing in electrical contacts

Theoretical and experimental determination of erosion rate due to arcing in electrical contacts

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

Evaluation of arcing damage on connector for 42V automotive power net

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