Uncertainty Evaluations of an AC Shunt Calibration System With a Load Effect Reduction Circuit

Kon, Seitaro; Yamada, T.

doi:10.1109/tim.2010.2103414

Cited by 24 publications

(18 citation statements)

References 8 publications

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“…Utilization of a resistor of this type will enhance the reliability of an ac resistance standard and other related standards such as an ac shunt standard [12] and an inductance standard [13]. It is also expected that this type of resistor will be utilized to perform international comparisons to demonstrate the international equivalence of ac resistance measurements among the national metrology institutes.…”

Section: Discussionmentioning

confidence: 99%

Development and Evaluation of High-Stability Metal-Foil Resistor With a Resistance of 1 <inline-formula> <tex-math notation="LaTeX">$\text{k}\Omega $ </tex-math></inline-formula>

Domae

Abe²,

Kumagai³

et al. 2015

IEEE Trans. Instrum. Meas.

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Prototype models of a high-stability metal-foil resistor of 1 k with a four-terminal-pair design were developed, and the key characteristics were evaluated. Two types of metalfoil resistors were fabricated: serial number (s/n) 1 is made from two resistor devices of 500 and s/n 2 is made from three resistor devices of 333 . To develop these resistor devices, a new resistor-device design was introduced. The s/n 1 resistor has the following key characteristics: drift rate: 0.010 (μ / )/year, first-order temperature coefficient at 23°C: −0.165 (μ / )/°C, frequency dependence of the resistance (relative change in resistance normalized at 1 kHz): ±0.21 μ / in the frequency range from 400 Hz to 2 kHz, and time constant: −0.46 ns. The s/n 2 resistor has the following key characteristics: drift rate: −0.092 (μ / )/year, first-order temperature coefficient at 23°C: 0.096 (μ / )/°C, frequency dependence of the resistance (relative change in resistance normalized at 1 kHz): ±0.54 μ / in the frequency range from 400 Hz to 2 kHz, and time constant: 0.12 ns.Index Terms-Drift rate, electrical resistance measurement, frequency dependence, measurement standards, phase-angle measurements, resistors, temperature dependence.

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Section: Discussionmentioning

confidence: 99%

Development and Evaluation of High-Stability Metal-Foil Resistor With a Resistance of 1 <inline-formula> <tex-math notation="LaTeX">$\text{k}\Omega $ </tex-math></inline-formula>

Domae

Abe²,

Kumagai³

et al. 2015

IEEE Trans. Instrum. Meas.

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“…[3,4] The principle of current-bridge method is to compare input current with a current derived from the output of the shunt resistor. The current derived from the shunt resistor is produced with a buffer amplifier (BUF) and a calibrated 1 kΩ ac standard resistor.…”

Section: Modified Current-bridge Methodsmentioning

confidence: 99%

“…[3,4] However, the measurement system that uses current bridge method had the limitation of the measurement frequency range because of the leak current due to the stray capacitance. However, the expansion of the measurement frequency and current ranges are needed.…”

Section: Modified Current-bridge Methodsmentioning

confidence: 99%

“…For these situations, an ac shunt calibration system has been developed and measurement results for both the ac resistance and phase angle were verified up to 1 kHz. [3,4] However, expansion of the measurement frequency and current ranges are needed for the evaluation of harmonic characteristics and high-frequency applications. [5] This paper describes the modified current-bridge method and its measurement uncertainties of the frequency range up to 3 kHz and the current dependencies of shunt resistors for both ac resistance and phase angle.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Current Heating on Accurate Measurements of AC Shunt Resistors at DC to 3 kHz

Kon

Yamada

2015

Transactions of The Japan Institute of Electronics Packaging

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To propose a structure of high-accuracy shunt resistors, the frequency and current dependencies of ac shunt resistors with different rated current are evaluated both of ac resistance and phase angle. To evaluate these characteristics, modified current-bridge method was developed. The ac resistances of the shunts do not vary considerably with the frequency, up to 3 kHz. The phase angle of ac shunts varies proportionally to the frequency. The current dependence of the ac resistance of shunts seems to change with current value. The current dependence of the phase angle of the shunt remain stable up to 10 A. Keywords

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“…The National Metrology Institute of Japan (NMIJ) has been developing an ac shunt calibration system [1] and an ECT error measurement system [2] according to both standards where standard CTs are the important components. Those ac shunts and ECTs are designed to measuring harmonic currents for evaluating power quality in power networks.…”

Section: Introductionmentioning

confidence: 99%

Calibration methods of a CC and BCG for a high-accuracy AC current ratio standard up to 4 kHz

Yamada

Kon

2014

29th Conference on Precision Electromagnetic Measurements (CPEM 2014)

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This paper describes calibration methods of current comparators (CCs) and balancing current generators (BCGs) accompanied with them, for establishing a high-accuracy ac current ratio standard up to 4 kHz. The CC calibration is explained mathematically according to the self-calibration procedure that NMIJ has been exploiting. The BCG calibration is based on measurement of the conversion ratio. The technique with a CC and CT is unique in terms of the fact that the uncertainty can be ignored against the CT calibration.

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Uncertainty Evaluations of an AC Shunt Calibration System With a Load Effect Reduction Circuit

Cited by 24 publications

References 8 publications

Development and Evaluation of High-Stability Metal-Foil Resistor With a Resistance of 1 <inline-formula> <tex-math notation="LaTeX">$\text{k}\Omega $ </tex-math></inline-formula>

Development and Evaluation of High-Stability Metal-Foil Resistor With a Resistance of 1 <inline-formula> <tex-math notation="LaTeX">$\text{k}\Omega $ </tex-math></inline-formula>

Effect of Current Heating on Accurate Measurements of AC Shunt Resistors at DC to 3 kHz

Calibration methods of a CC and BCG for a high-accuracy AC current ratio standard up to 4 kHz

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