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Development of a Ratio Calibration Bridge for Inductive Voltage Dividers  

Kang Jeon Hong (한국표준과학연구원 전자기표준부 전기, 자기그룹)
Han Sang Ok (충남대학교 공대 전기공학과)
Kim Han Jun (한국표준과학연구원 전자기표준부 전기, 자기그룹)
Publication Information
The Transactions of the Korean Institute of Electrical Engineers B / v.54, no.5, 2005 , pp. 217-221 More about this Journal
Abstract
A inductive voltage divider(IVD) is widely used as a ratio arm of precise impedance measurement bridges at low frequencies of audio frequency range and a well fabricated IVD has ratio error of $10^{-7}$ order without any calibration. Recently, the order of $10^{-8}$ of the best measurement uncertainty is needed for calibration and maintenance of impedance standards as national standards. In order to achieve that uncertainty, the IVD which is used for a ratio arm of precise impedance measurement bridge should be calibrated within the uncertain of order of $10^{-8}$ For this purpose, a ratio calibration bridge for IVDs has been developed. The measurement uncertainties of both inphase and quadrature of the bridge are analyzed less then $3{\times}10^{-8}$ respectively at 1 kHz and 25 V.
Keywords
IVD(Inductive Voltage Divider); Totoidal Core; Inphase; Quadrature Error; Bridge;
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Times Cited By KSCI : 1  (Citation Analysis)
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