Xianlin Pan

A New Method for Measuring the Level Dependence of AC Shunts

We describe a method of the measurement of level dependence in AC-DC difference of current shunts. The method is based on the use of a binary inductive bridge. The measuring principle and measurement results of a 1 A AC shunt at frequencies up to 100 kHz are presented.

Self-calibration of the binary inductive voltage divider at frequencies up to 1MHz

The binary inductive voltage dividers (BIVD) have been designed as the 2:1 ratio reference at frequencies up to 1MHz. In this paper, the BIVDs are described in detail together with the calibration of their ratio errors by a substitution method. The measurement results of the BIVDs have also been given at frequencies from 1 kHz to 1MHz.

Using inductive voltage divider to measure the millivolt ac voltage at frequencies up to 100 kHz

A method to measure the millivolt ac voltage has been described. The method is based on use of the binary inductive voltage divider and 2n:1IVDs. The measurement setup for the calibration of the 2n:1IVD has been proposed and the results have also been given at frequencies up to 100 kHz.

Determination of Equivalent Inductance of Current Shunts at Frequency Up to 200 kHz

We report on the measurement techniques and results of the equivalent inductance of current shunts at frequencies from 50 to 200 kHz. With a three-branch binary inductive current divider and difference detection transformer, the equivalent inductance of the cagelike shunts was measured against a set of four-terminal resistors whose time constants were accurately determined. The verification experiments for the systematic errors of the measurement setup and the phase comparator with the current ratio of 2 : 1 are also presented.

Measurement of the Phase Angle Errors of High Current Shunts at Frequencies up to 100 kHz

This paper describes a new method for determining phase angle errors of shunts with rated currents at 50 and 100 A at frequencies from 25 to 100 kHz. The method is based on the use of a three-branch binary inductive current divider to measure the phase angle errors of high current shunts against a phase angle reference standard with only one step. An inductive high current shunt has been designed using a 100:1 current transformer connected in parallel with a 1-

Comparison of the phase angle errors between RVD and IVD

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Design and self-calibration of cascaded inductive voltage divider with ratio of 2 n :1

shunt. The phase angle errors of resistive high current shunts and the inductive high current shunt have been measured. The level dependence in phase angle errors of three different types of high current shunts has been evaluated at currents from 1 to 100 A. The measurement results and standard uncertainties of the phase angle errors of high current shunts are reported.

Design and self-calibration of the RVD with serial-parallel connection

The resistive voltage divider with serial-parallel structure and cascaded inductive voltage divider are designed. Both dividers can be self-calibrated. A comparison measurement setup has also been developed to measure the difference between two dividers. The results are presented and shown well agreement between two independent methods at frequencies from 10 kHz to 100 kHz.

Design of the current comparator for measuring the current shunts at common ground

A set of cascaded IVDs with ratio of 2n:1 has been designed and self-calibrated. The IVD is built based on the use of the cascaded structure between the IVD with ratio of 2n-1:1 and BIVD. The amplitude errors and phase angle errors of the IVDs with ratios from 2:1 to 256:1 have been measured by means of sampling method at frequencies ranging from 10 kHz to 100 kHz, and the measurement results are presented.

Self-calibration of the current comparator with common ground

A new design of resistive voltage divider with serial-parallel connection has been built. A self-calibration method has also been proposed to determine the phase angle errors of the resistive voltage divider. The measurement has been done at frequencies from 10 kHz to 100 kHz to calibrate two RVDs with ratio of 100:1 and results are presented.