2009 32nd International Spring Seminar on Electronics Technology 2009
DOI: 10.1109/isse.2009.5207023
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Investigation of the pulse load behavior of power wire-wound resistors

Abstract: A long-term resistance drift of wire-wound resistors or even afailure is frequently caused by short but repeated temperature peaks during pulse load operation. In this paper this aspect is investigated by comparison oftwo types ofpower wire-wound resistors with identical resistance value, nominal power, and size, but significantly different thermal behavior under pulse load condition. In order to capture the thermal cause as directly as possible a specific measuring circuit was developed to record the temperat… Show more

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“…While there is only a small fault current through its body, it would heat continuously and reach a rather high temperature up to 300-500 0 C, and it will damage other components and plastic around. The popular solution to this problem is to connect a thermal fuse with the WWR in series closely and thermal fuse will be triggered by WWR's abnormal over temperature [4][5][6][7][8]. But this is not a best solution, because thermal fuse responds slowly due to low heat transfer efficiency and the risk of over temperature still exists.…”
Section: Introductionmentioning
confidence: 99%
“…While there is only a small fault current through its body, it would heat continuously and reach a rather high temperature up to 300-500 0 C, and it will damage other components and plastic around. The popular solution to this problem is to connect a thermal fuse with the WWR in series closely and thermal fuse will be triggered by WWR's abnormal over temperature [4][5][6][7][8]. But this is not a best solution, because thermal fuse responds slowly due to low heat transfer efficiency and the risk of over temperature still exists.…”
Section: Introductionmentioning
confidence: 99%