Effect of Low Bi Content on Reliability of Sn-Bi Alloy Joints Before and After Thermal Aging

Nishikawa, Hiroshi; Hirata, Yuki; Yang, Chih-han; Lin, Shih‐kang

doi:10.1007/s11837-021-05146-3

Cited by 7 publications

(2 citation statements)

References 27 publications

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“…The greater the energy, the faster the insulation deterioration rate. Therefore, the variation trend of the partial discharge pulse power with the applied voltage amplitude shows that the deterioration rate of the turn-to-turn insulation of the model sample increases with the increase of the applied voltage amplitude [20][21][22][23].…”

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confidence: 88%

Life Prediction of Dry Reactor Sensor Based on Deep Neural Network

et al. 2022

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In order to solve the problem of increasing the number and service life of a dry-type air core reactor and frequent interturn insulation faults, this paper proposes a life prediction method of a dry-type reactor sensor based on the deep neural network. On the basis of summarizing the research status of turn-to-turn insulation-related problems, this method studies the switching overvoltage generated in the process of breaking the dry-type air core reactor, the deterioration law of turn-to-turn insulation under the cumulative action of switching overvoltage, the influence of thermal aging on the Switching Overvoltage Withstand characteristics of turn-to-turn insulation, and the electrical aging life of turn-to-turn insulation under the power frequency overvoltage. Based on the deep neural network, the electrical aging life model of turn-to-turn insulation of the dry-type air core reactor under power frequency overvoltage is obtained. The results are as follows: with the increase of the applied voltage amplitude, the deterioration speed of the turn-to-turn insulation of the model sample accelerates. When the applied voltage amplitude reaches a certain value, the maximum discharge amount and pulse discharge power of the partial discharge pulse increase rapidly, and the image coincidence degree reaches 85%. The electric aging life curve of the modified interturn insulation model sample of the dry-type air core reactor has a high correlation with the measured aging life data, and the performance is more than 95%. The research results of this paper lay a practical foundation for further research on the deterioration mechanism of interturn insulation under the combined action of multiple factors and provide theoretical support for the risk and life assessment of the dry-type air core reactor.

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confidence: 88%

Life Prediction of Dry Reactor Sensor Based on Deep Neural Network

et al. 2022

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“…In this case, it is not necessary to solder the busbar manually or automatically, but the busbar can only be secured on the PVB foil using acrylic glue and the activation will take place within the autoclave cycle (Nishikawa et al, 2022). Subsequently, the use of Bi 57 -In 26 -Sn 17 bismuth-indium-tin solder is suggested Fig.…”

Section: Introductionmentioning

confidence: 99%

Lead-Free Conductors with a Surface Treatment Ensuring a Low Melting Temperature

Mareška,

Kordová,

Havlík Míka

2024

Period. Polytech. Transp. Eng.

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In order to protect the environment and to ensure sustainability, it is prohibited to use lead materials in the production of automotive components. As part of soldering, busbars are used that usually have a copper core and a coating made of tin, but the melting point of such material is high, which poses a problem during soldering. This article discusses the case where a busbar is interconnected with another conductor in a sealable pressure vessel where high temperatures and pressures are reached. The product is heated to a certain temperature and the melting temperature of the given bus coating is exceeded, resulting in soldering and an ideal connection of the wires. The problem is that the temperatures reached by the processor during this operation are lower than the melting temperatures of the busbar with a tin coating. In the article, the authors focus on the production and development of new types of busbars with a coating consisting of tin, bismuth and indium and discuss possible formulations and their effect on the melting temperature of the busbars.

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Effect of electric pulse auxiliary reflow soldering on the microstructure and properties of Sn58Bi/Cu solder joints

Zhao,

Ji,

et al. 2024

J Mater Sci

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Effect of Low Bi Content on Reliability of Sn-Bi Alloy Joints Before and After Thermal Aging

Cited by 7 publications

References 27 publications

Life Prediction of Dry Reactor Sensor Based on Deep Neural Network

Life Prediction of Dry Reactor Sensor Based on Deep Neural Network

Lead-Free Conductors with a Surface Treatment Ensuring a Low Melting Temperature

Effect of electric pulse auxiliary reflow soldering on the microstructure and properties of Sn58Bi/Cu solder joints

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