- 标题
- 摘要
- 关键词
- 实验方案
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[IEEE 2018 Conference on Precision Electromagnetic Measurements (CPEM 2018) - Paris, France (2018.7.8-2018.7.13)] 2018 Conference on Precision Electromagnetic Measurements (CPEM 2018) - Development of Power Frequency Digital Phase Shifter
摘要： In the measurement of high voltage loss, a voltage signal and a current signal which were nearly orthogonal to each other need to be measured accurately. If the phase of the voltage signal was shifted by 90° accurately, thus the phase angle between the voltage and the current would be nearly 0°. The two signals would be then easily to measure accurately together. A digital phase shifter was developed. The phase and the magnitude error of the digital phase shifter is less than 6 μrad and 110 × 10-6 up to 150 Hz and 120 V, respectively.
关键词： phase shifter,loss measurement,phase accuracy,Analog-to-Digital Convertor (ADC),Digital-to-Analog Convertor (DAC)
更新于2025-09-10 09:29:36
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[IEEE 2018 Conference on Precision Electromagnetic Measurements (CPEM 2018) - Paris, France (2018.7.8-2018.7.13)] 2018 Conference on Precision Electromagnetic Measurements (CPEM 2018) - Calibration of AC Voltage for a High Speed Sampling ADC Board Using Thermal Voltage Converters
摘要： This paper describes a calibration technique for a commercial Analog-to-Digital Converter (ADC) board using Thermal Voltage Converters (TVCs) up to 1 MHz with various sampling rates. The DC voltage was calibrated first. Then, AC-DC transfer difference of the ADC board was measured by comparing it with a standard TVC. The AC voltage error was calculated by using both calibration results. The estimated expanded uncertainty of the AC voltage error for 0.5 Vrms was less than 70 μV in 1-V range of the ADC for all sampling rates.
关键词： calibration,analog-to-digital convertor,AC-DC transfers measurements,measurement uncertainty,loading effect
更新于2025-09-10 09:29:36