CURRENT SENSOR CONTROL DEVICE

PROBLEM TO BE SOLVED: To compensate an offset of a current sensor, which is caused by an error due to a residual magnetic field of the current sensor and an error due to a temporal variation.SOLUTION: A current sensor control device comprises a current sensor 6 for detecting a current flowing throug...

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Bibliographische Detailangaben
Hauptverfasser:	AMAGAI SHUNSUKE, ISONAGA TAISUKE
Format:	Patent
Sprache:	eng
Schlagworte:	CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY GENERATION MEASURING MEASURING ELECTRIC VARIABLES MEASURING MAGNETIC VARIABLES PHYSICS TESTING
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To compensate an offset of a current sensor, which is caused by an error due to a residual magnetic field of the current sensor and an error due to a temporal variation.SOLUTION: A current sensor control device comprises a current sensor 6 for detecting a current flowing through a load, an offset compensation unit 7 for compensating an offset of the current sensor 6, and a circuit unit which generates a degaussing current for reducing a residual magnetic field of the current sensor 6. The offset compensation unit 7 calculates an offset value of the current sensor 6 by using a measurement value of the degaussing current, which is measured by the current sensor 6, and using a current value of the degaussing current, which corresponds to the measurement value, and compensates the offset on the basis of the offset value.