Improved Model and Phase-Angle Verification of Current Shunts for AC And Power Measurements

Svensson, Stefan; Rydler, Karl-Erik; Tarasso, Valter

doi:10.1109/cpem.2004.305451

Cited by 26 publications

(11 citation statements)

References 5 publications

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“…The voltages are measured in 4T (four terminal) setups. i m (t) is measured by the voltage drop v ref (t) across the reference resistor with a Keysight 3458A (DMM1), which provides appropriate accuracy for the sampling of lowfrequency voltages [14][15][16]:…”

Section: Basic Concept Of the Impedance Measurement Set-upmentioning

confidence: 99%

Primary measurement method for the characterisation of impedance standard in the mΩ range

Rusanto

Seitz

Funck

et al. 2022

Meas. Sci. Technol.

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Impedance standards having impedance values in the low mΩ range, with non-zero reactances, and operable with AC-currents of a few Amps and up to a few kHz are needed for appropriate impedance meter calibration. These challenging operation parameters are most relevant for electrochemical impedance spectroscopy of high energy Li-ion battery cells. We present a primary measurement method that can be used for the characterisation of respective impedance standards traceable to the SI. Basically, two calibrated high precision DC voltage meters are used to sample the voltages across a characterised reference resistor and the impedance standard under test, while both are excited with the same ac current. The measured voltages are fitted with sin waves and the complex impedance value is calculated from the amplitudes and phase difference of the voltage curves. We present the measurement results of a test impedance in mΩ range, including a full uncertainty budget. Moduli of the measured impedances are compared with those of another method that has been presented recently. The results are equivalent up to 1 kHz and within a relative expanded uncertainty of around 0.47%.

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Section: Basic Concept Of the Impedance Measurement Set-upmentioning

confidence: 99%

Primary measurement method for the characterisation of impedance standard in the mΩ range

Rusanto

Seitz

Funck

et al. 2022

Meas. Sci. Technol.

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“…The resistance value R s was calibrated against a resistance standard, and C was measured to be less than 10 pF by making the resistance wires unconnected with the copper disk. According to (1) and (2), for determining the time constant and phase angle errors of the time constant standard at different frequencies, the inductance of the shunt is the critical part to be measured.…”

Section: Time Constant Standardmentioning

confidence: 99%

“…In the presence of residual inductance and distributed capacitance, the phase angle errors of the ac shunts will be frequency dependent [2]. For estimating the influence of those distributed parameters, several structures have been developed as the calculable references for measuring the phase angle errors of the ac shunts.…”

Section: Introductionmentioning

confidence: 99%

A Coaxial Time Constant Standard for the Determination of Phase Angle Errors of Current Shunts

Pan

Zhang

et al. 2013

IEEE Trans. Instrum. Meas.

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This paper describes a new method to determine the phase angle errors of ac shunts by measuring the inductance and distributed capacitance. A 1-Ω shunt of coaxial design has been developed as the time constant standard. A coaxial inductor with identical structure as the time constant standard has been developed. A four-terminal mutual inductor has also been built for the measurement of the inductance of the time constant standard. The method is based on the use of a binary inductive current divider to compare the inductor with the mutual inductor. The standard uncertainty of the inductance measurement of the time constant standard is within 28 pH at frequencies up to 200 kHz. The expanded uncertainty of the phase angle errors is from 0.4 μrad at 1 kHz to 80.0 μrad at 200 kHz at 1 A. Index Terms-Binary inductive current divider (BICD), current shunt, four-terminal mutual inductor, residual inductance, substitution method, time constant.

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“…The difficulties in measurement of non-sinusoidal power quantities are discussed in [6]. The known problem with shunt resistor phase shift is studied in [7]. The practical problems of power loss measurements are discussed in [8].…”

Section: Introductionmentioning

confidence: 99%

Comparison of calorimetric and electrical loss measurement methods in a frequency converter research and development application

Mattsson

2011

2011 IEEE Energy Conversion Congress and Exposition

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New applications of frequency converters such as solar energy have growing need to determine the efficiency of a converter with good precision. The component level losses are not easy to measure as the input and output of converter components are not sinusoidal. The calorimetric method gives an approach for measuring the losses directly rather than using the difference of the electrically measured quantities. This paper compares the feasibility of the described methods in an active rectifier input filter power loss measurement. The calorimetric method is superior in accuracy, but the measurement time is multiple compared to the electrical method. Electrical measurement instrument calibration by comparison with calorimetric method could have significant practical applications resulting in a combined system with high accuracy and short measurement duration.

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Improved Model and Phase-Angle Verification of Current Shunts for AC And Power Measurements

Cited by 26 publications

References 5 publications

Primary measurement method for the characterisation of impedance standard in the mΩ range

Primary measurement method for the characterisation of impedance standard in the mΩ range

A Coaxial Time Constant Standard for the Determination of Phase Angle Errors of Current Shunts

Comparison of calorimetric and electrical loss measurement methods in a frequency converter research and development application

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