Error Analysis of Improved Current‐Bridge Method for Accurate Low‐Impedance Measurement

SUMMARY The improved current‐bridge method and its mathematical mode are proposed for accurate low‐impedance measurement. To realize the accurate measurements of shunt resistors smaller than 1 mΩ, the expansion of current ratio of a current transformer and a current comparator, the use of low‐value...

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Bibliographic Details
Published in:Electronics and communications in Japan 2017-05, Vol.100 (5), p.26-33
Main Authors: KON, SEITARO, YAMADA, TATSUJI
Format: Article
Language:English
Subjects:
Amplification
Buffers
Bypasses
current
Electronics
Error analysis
frequency characteristics
Impedance measurement
Inspections
low‐impedance
Mathematical analysis
measurement
measurement standard
Resistors
shunt resistor
Shunts
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Summary:SUMMARY The improved current‐bridge method and its mathematical mode are proposed for accurate low‐impedance measurement. To realize the accurate measurements of shunt resistors smaller than 1 mΩ, the expansion of current ratio of a current transformer and a current comparator, the use of low‐value resistance for reference impedance, and the development of a buffer amplifier which have flat load characteristics are required. The improved current bridge‐method has the possibility for accurate measurement of shunt resistors up to 10 μΩ.
ISSN:1942-9533
1942-9541
DOI:10.1002/ecj.11951