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

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

doi:10.1109/tcapt.2002.804606

Cited by 33 publications

(6 citation statements)

References 8 publications

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“…When the high-power relay contacts break the circuit, a molten metal bridge is generated because of ohmic heating as the contact area decreases. After the molten metal bridge ruptures, a metallic phase arc is generated, which then transforms into a gaseous phase arc [2][3][4]. The arcs and the resulting contact erosion have become the main factors limiting the development of DC relays to higher power [2,4].…”

Section: Introductionmentioning

confidence: 99%

Study on magnetically blown arc characteristics and the resulting contact erosion mechanisms of high-power DC relays

Hou

Zhang

et al. 2023

J. Phys. D: Appl. Phys.

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High-power DC relays are widely used in new energy power systems and DC distribution networks, and commonly use transverse magnetic fields to accelerate arc extinguishing. In this paper, the magnetically blown arc characteristics and the resulting contact erosion mechanisms of high-power DC relays are studied by experiments and simulations. The experiments are carried out to analyze the arc motion, contact erosion mass, and contact morphologies, and to verify the simulation model. Considering the energy transfer source term, the establishment of a more perfect magnetohydrodynamic arc model is accomplished, and an erosion model is further established. The results indicate that the magnetically blown arcing process has three stages while the arc shapes and motion characteristics are different, and the heat flux acting on the contact can be accurately obtained by the arc model. The greater external transverse magnetic field is more conducive to extinguishing the arc and reducing the arc erosion time. In contrast, the Archimedes force plays a very small positive role and the self-induced magnetic field of the arc has a negative effect. For contact erosion, the temperature distribution of the molten pool appears trailing effect. Moreover, the advanced mathematical model proposed for erosion mass has good accuracy. The calculation results of erosion rates show that Cr reduces erosion while the current increases erosion nonlinearly. Besides, the flow and deformation characteristics of the molten pool will lead to convex strip-shaped erosion traces and arcing position transfer, and the moving erosion will cause the lateral accretion effect. Furthermore, the analysis shows that the reason for edge droplet sputtering is the pressure difference caused by Plateau-Rayleigh instability, and optimization suggestions for reducing contact erosion are given.

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Section: Introductionmentioning

confidence: 99%

Study on magnetically blown arc characteristics and the resulting contact erosion mechanisms of high-power DC relays

Hou

Zhang

et al. 2023

J. Phys. D: Appl. Phys.

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“…The whole structure is more complicated. The DC arc faults of electric vehicle (EV) battery systems have been discussed in [18–22]. The characteristics and detected methods of DC arc in battery are analysed.…”

Section: Introductionmentioning

confidence: 99%

Binary classification model based on machine learning algorithm for the DC serial arc detection in electric vehicle battery system

Xia

Guo

et al. 2019

IET Power Electronics

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Direct current (DC) serial arc faults usually occur in the damaged insulation lines or line connections, which will cause serious accidents such as fires and explosions. With the rapid increase of electric vehicles, DC serial arc faults are more and more dangerous to battery system. Therefore, a binary classification model based on machine learning algorithm was proposed to detect DC serial arc faults effectively in this study. It was optimised according to the characteristic signals of the arc to be satisfied with different loads for higher detection accuracy and robustness. In the simulative experiments for the power system electric vehicle, while the loads changing to the motor, the resistor or the inverter, it will all reach a highly successful detection rate, respectively.

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“…As a result, there have been a lot of considerations on how to modify the architecture of the automotive electrical power systems in the past twenty years [10][11][12]. About ten years ago, the introduction of an additional 42 V level was being discussed in order to reduce the currents drawn from the power net as well as the voltage fluctuations that are caused by high power loads [13,14].…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigations on Voltage Stability in Multilevel Power Nets

Kohler

Wank²,

Thanheiser³

et al. 2012

WEVJ

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In recent years, more and more components in vehicles have been electrified in order to improve the safety and comfort of the passengers as well as the driving performance. Owing to these developments, it has become increasingly difficult to guarantee the voltage stability within the 12 V as well as the high voltage power bus. However, a new degree of freedom arises, as the two power nets are connected in order to exchange energy. As a consequence, they are able to stabilize their voltage reciprocally. This paper deals with the analysis of how two voltage levels can be coupled actively in order to stabilize their voltages in power demanding situations. A power net test bench consisting of a 12 V power net and a high voltage power net is built. In the 12 V power net, original chassis and wiring harness are used in order to achieve the most realistic behavior. Furthermore, there are two control modes presented. In the power control mode, the power flow is increased preventively when the prediction model detects a critical situation that is likely to occur in the near future. In the voltage control mode, the voltage controller of the DC chopper converter is used to stabilize the power net voltage in real time. Both control methods can easily be implemented into a universal power distribution management system. The voltage control mode is experimentally investigated at the power net test bench and it is shown that the minimum voltage in very power-consuming driving situations is increased by about 1.5 V per 1000 W of applied power supplied by the DC chopper converter.

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

Cited by 33 publications

References 8 publications

Study on magnetically blown arc characteristics and the resulting contact erosion mechanisms of high-power DC relays

Study on magnetically blown arc characteristics and the resulting contact erosion mechanisms of high-power DC relays

Binary classification model based on machine learning algorithm for the DC serial arc detection in electric vehicle battery system

Experimental Investigations on Voltage Stability in Multilevel Power Nets

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