Electrical current measurement system, and diagnostic system

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United States of America Patent

PATENT NO 12203962
APP PUB NO 20220308093A1
SERIAL NO

17442560

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Abstract

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A current measurement system is configured to measure an alternating-current (AC) current flowing through a conductor. The AC current has a frequency within a measurement range. The system includes a current sensor and a shunt resistor. The current sensor includes a measurement coil configured to be magnetically coupled to the conductor. The shunt resistor has both ends electrically connected to both ends of the measurement coil, respectively. An output voltage across the both ends of the shunt resistor is saturated at a saturation point in a saturation frequency of the frequency of the AC current. An upper limit value of the measurement range including the frequency is higher than a fundamental frequency of the AC current. The saturation frequency is higher than or equal to the upper limit value. The current measurement system improves sensitivity to frequency components higher than the fundamental frequency of the AC current.

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Patent Owner(s)

Patent OwnerAddress
PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTDOSAKA JAPAN OSAKA

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ichihashi, Hirohide Osaka, JP 7 10
Ikeda, Kazutaka Nara, JP 52 362
Sato, Yuta Osaka, JP 77 347

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