NDLI: Investigation of the pulse load behavior of power wire-wound resistors

Content Provider	IEEE Xplore Digital Library
Author	Nicolics, J. Fasching, M.
Copyright Year	2009
Description	Author affiliation: Institute of Sensor and Actuator Systems, Vienna University of Technology, Gusshausstrasse 27-29, A-1040, Austria (Nicolics, J.) \|\| mfTEC Fasching KEG, A-3033 Altlengbach, Maiss 10, Austria (Fasching, M.)
Abstract	A long-term resistance drift of wire-wound resistors or even a failure is frequently caused by short but repeated temperature peaks during pulse load operation. In this paper this aspect is investigated by comparison of two types of power 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 temperature as a function of time in the resistor wire during the dynamic cooling phase immediately after a pulse. In this way a peak temperature of e.g. 405°C was observed in one resistor type whereas the peak temperature in the other one at the same pulse load condition exceeded even 1000°C which is undoubtedly detrimental if periodically repeated. The measuring principle is presented in detail. The measuring accuracy is estimated and its meaning for the interpretation of the obtained results is shown. Based on these results the dependence of the pulse load resistivity of a wire-wound resistor on its interior structure is discussed. It is demonstrated that the pulse load performance can be improved significantly by increasing the thermal capacitance of the resistor wire without increasing the resistor size.
Starting Page	1
Ending Page	5
File Size	2168900
Page Count	5
File Format	PDF
ISBN	9781424442607
DOI	10.1109/ISSE.2009.5207023
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-05-13
Publisher Place	Czech Republic
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Resistors Temperature Thermal resistance Thermal loading Pulse measurements Wire Electrical resistance measurement Phase measurement Time measurement Circuits
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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