Wyniki wyszukiwania - BazTech

Ograniczanie wyników

2 2022

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: current shunt

Sortuj według:

Ogranicz wyniki do:

Precyzyjne szerokopasmowe współosiowe boczniki prądowe

Malinowski Maciej, Kubiczek Krzysztof, Kampik Marian

Przegląd Elektrotechniczny

2022

R. 98, nr 11

123--126

W artykule zaprezentowano konstrukcję, model matematyczny oraz wyniki symulacji transferu AC-DC precyzyjnych współosiowych boczników prądowych o prądach nominalnych 10, 20, 50, 100 i 200 mA, opracowanych w Katedrze Metrologii, Elektroniki i Automatyki na Wydziale Elektrycznym Politechniki Śląskiej w Gliwicach. W pracy przedstawiono wyniki badań prototypu bocznika 50 mA. Wyniki badań zostały porównane z wynikami obliczeń numerycznych uzyskanych na podstawie modelu matematycznego bocznika.

Article presents construction, mathematical model and AC-DC transfer difference simulation results of high-precision coaxial 10, 20, 50, 100, 200 mA current shunts designed in Department of Measurement Science, Electronics and Control at Silesian University of Technology in Gliwice. The paper presents the calibration results of a 50 mA shunt prototype. The calibration results were compared with the results of numerical calculations obtained on the basis of the mathematical model of the shunt.

Precision Calculations of the Characteristic Impedance of Complex Coaxial Waveguides Used in Wideband Thermal Converters of AC Voltage and Current

Kubiczek Krzysztof, Kampik Marian

International Journal of Electronics and Telecommunications

2022

Vol. 68. No. 3

527--533

The article presents precision and numerically stable method of calculation of the characteristic impedance of cylindrical multilayer waveguides used in high-precision wideband measuring instruments and standards, especially calculable thermal converters of AC voltage and precision wideband current shunts. Most of currently existing algorithms of characteristic impedance calculation of such waveguides are based upon approximations. Unfortunately, application of such methods is limited to waveguides composed of a specific, usually low number of layers. The accuracy of approximation methods as well as the number of layers is sometimes not sufficient, especially when the coaxial waveguide is a part of precision measurement equipment. The article presents the numerically stable matrix analytical formula using exponentially scaled modified Bessel functions to compute characteristic impedance and its components of the cylindrical coaxial multilayer waveguides. Results obtained with the developed method were compared with results of simulations made using the Finite Element Method (FEM) software simulations. Very good agreement between results of those two methods were achieved.