A simulation tool for the AC-DC transfer difference of thermal converters at low frequencies

Author

Laiz, Hector ; Klonz, Manfred

Author_Institution

Inst. Nacional de Tecnologia Ind., San Martin, Argentina

Volume

48

Issue

6

fYear

1999

fDate

12/1/1999 12:00:00 AM

Firstpage

1155

Lastpage

1160

Abstract

To find the reason for the AC-DC transfer differences of the planar multijunction thermal converter (PMJTC) at low frequencies, where temperature oscillation is present due to the lack of integration of the oscillating Joule heat, the coupled electro-thermal mathematical problem has been solved. The dynamic nonlinear model includes the temperature dependence of all material parameters, of heat conduction through the air and radiation losses. The results of the simulation are compared with those of measurements using a sampling voltmeter with special software as a reference. A new design is proposed to improve the performance of the PMJTC at low frequencies

Keywords

convertors; electric current measurement; transfer standards; voltage measurement; AC-DC transfer difference; coupled electro-thermal mathematical problem; dynamic nonlinear model; heat conduction; material parameters; oscillating Joule heat; planar multijunction thermal converter; radiation losses; sampling voltmeter; simulation tool; temperature dependence; thermal converters; Analog-digital conversion; Frequency conversion; Heat transfer; Resistance heating; Temperature; Thermal conductivity; Thermal resistance; Thermal variables measurement; Thermoelectricity; Voltage;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/19.816130

Filename

816130