Impact of Electromagnetic Field upon Temperature Measurement of Induction Heated Charges

The use of thermoelements is a commonly applied method in industry and engineering. It provides a wide measurement range of temperature, a direct voltage signal from the transducer, low cost of the thermoelement, and its resistance to many unfavorable factors which occur in an industrial environment...

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Bibliographic Details
Published in:International journal of thermophysics 2013-04, Vol.34 (4), p.667-679
Main Authors: Smalcerz, A., Przylucki, R.
Format: Article
Language:English
Subjects:
Classical Mechanics
Condensed Matter Physics
Electromagnetic fields
Electromagnetic induction
Heating
Heating systems
Inductors
Industrial Chemistry/Chemical Engineering
Physical Chemistry
Physics
Physics and Astronomy
Temperature measurement
Transducers
Voltage
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Summary:The use of thermoelements is a commonly applied method in industry and engineering. It provides a wide measurement range of temperature, a direct voltage signal from the transducer, low cost of the thermoelement, and its resistance to many unfavorable factors which occur in an industrial environment. Unfortunately, thermoelements may not be resistant to interferences of a strong electromagnetic field because of the nature and design of a transducer. Induction heating is the most commonly used type of heating, at present, for metals. In order to guarantee the correctness of the carried out heating process, it is essential to control the temperature of the heated element. The impact of a strong electromagnetic field upon the thermocouple temperature measurement of the inductively heated elements has been analyzed in this paper. The experiment includes dozens of measurements where the following parameters have been varied: frequency of the current which feeds the heating inductor, power supplied to the heating system, geometry of heat inductor, and the charge material and its geometrical dimensions. Interferences of the power-line frequency have been eliminated in part of the carried out measurements.
ISSN:0195-928X
1572-9567
DOI:10.1007/s10765-013-1423-1