研究目的
To design, develop, construct, and calibrate a set of current shunts from 20 mA to 100 A for use in a new standard for power measurements up to 100 kHz.
研究成果
A set of 12 current shunts with ranges from 20 mA to 100 A were designed, built, and calibrated using ac-dc transfer techniques. Results for phase calibration will be presented at the conference.
研究不足
The paper does not explicitly mention the limitations of the research.
1：Experimental Design and Method Selection:
The design involves three different configurations for shunts based on their current ranges. Calibration in ratio was done by ac-dc current transfer techniques, and phase calibration was performed by measuring the phase difference between the output voltages of the shunt used as standard and the unit under test using a high-resolution, dual-channel digital sampling system.
2：Sample Selection and Data Sources:
The shunts were designed for input nominal values of 20 mA, 50 mA, 100 mA, 200 mA, 500 mA, 1 A, 2 A, 5 A, 10 A, 20 A, 50 A, and 100 A, with an output voltage of
3：8 V. List of Experimental Equipment and Materials:
Vishay Z-foil resistors (Z201), PCB with copper strips, metal box, N-female type connectors, Clarke-Hess 8100 transconductance amplifier, digital multimeters (DMM) Agilent 3458, HP3245 source, cesium clock, 24 bits sigma-delta analog-to-digital converter.
4：Experimental Procedures and Operational Workflow:
The shunts were constructed in three different designs based on their ranges. Calibration in ratio was performed using ac-dc current transfer techniques, and phase calibration was done by measuring the phase difference between the output voltages of the shunt used as standard and the unit under test.
5：Data Analysis Methods:
The phase difference was measured using simultaneous asynchronous sampling in two DMMs and processing the data with IpDFT (Enhanced Interpolated-DFT).
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digital multimeters
3458
Agilent
Used for measuring the phase difference between the output voltages of the shunt used as standard and the unit under test.
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Vishay Z-foil resistors
Z201
Vishay
Used in the construction of shunts from 20 mA to 200 mA.
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Clarke-Hess 8100 transconductance amplifier
8100
Clarke-Hess
Used to generate currents up to 100 A with frequencies ranging from dc to 100 kHz.
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HP3245 source
3245
HP
Used to generate 50 kHz sampling pulses.
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sigma-delta analog-to-digital converter
Used for an alternative way to measure the phase difference between two shunts.
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