On Peculiarities of Welding and Destruction of the Surface of High-Current Layered Contacts by Pulsed Currents

Chalyi, A. M.; Дмитриев, В. А.; Pavleino, M. A.; Pavleino, O. M.; Safonov, M. S.

doi:10.3103/s1068375518010027

Cited by 2 publications

(1 citation statement)

References 6 publications

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“…Slade et al [ 12 ] experimentally studied the effect of short circuit currents on the welding of closed contacts in vacuum circuit breakers for load forces of 1.3–2.1 kN and a current of 20 kA, and concluded that the increase of load force and/or the reduced current duration could substantially inhibit the material welding. Chalyi et al [ 19 ] examined the effect of short-duration pulsed currents on the welding strength of closed electrodes for load forces of 100 N and 300 N.…”

Section: Introductionmentioning

confidence: 99%

Modeling and Experimental Verification of Material Welding Characteristics for Low Current Switching Devices

Ren

2020

Materials

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Material welding failure considerably influences the electrical lifetime and reliability of low current switching devices. However, relevant studies on methods for calculating the threshold welding current and welding area under milli-Newton scale load forces are very limited. In this paper, the welding characteristics of metal material, including the threshold welding current, welding area and welding force are studied by using theoretical calculations and experiments. The comparison between the theoretical calculation and experimental results shows the accuracy of the built model. Further, the effects of mechanical load force and load current on welding force and welding area of representative metal materials are investigated. It is found that the anti-welding ability of metal materials depends not only on the exerted load force and current, but also the electrical resistivity, the thermal conductivity, the tensile strength, and the melting temperature of the materials.

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Section: Introductionmentioning

confidence: 99%

Modeling and Experimental Verification of Material Welding Characteristics for Low Current Switching Devices

Ren

2020

Materials

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Contact welding strength measurement for metal electrode materials conducting inrush electrical current

Ren

2020

Review of Scientific Instruments

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Contact welding is considered the major failure mechanism for electromechanical switch applications. There has been increasing demand to research the measurement method to characterize the anti-welding ability of metal electrode materials. In this paper, the contact welding phenomenon of closed electrodes is made to reoccur by using our novel designed test rig. The welding strength and welding area of typical electrode materials, including silver, copper, silver tin oxide, and silver nickel alloy, are explicitly measured and compared. In addition, the effects of electrical current and mechanical load force on welding strength and welding trace are presented. The calculation method of the threshold welding current is introduced for elastic contact situation in low current switching devices.

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On Peculiarities of Welding and Destruction of the Surface of High-Current Layered Contacts by Pulsed Currents

Cited by 2 publications

References 6 publications

Modeling and Experimental Verification of Material Welding Characteristics for Low Current Switching Devices

Modeling and Experimental Verification of Material Welding Characteristics for Low Current Switching Devices

Contact welding strength measurement for metal electrode materials conducting inrush electrical current

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