Current sensor
AssigneeMurata Manufacturing Co., Ltd.
InventorsYasuhiro SHIMIZU, Noritaka Kishi
Life of this patent
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Abstract
A current sensor outputs an output voltage in accordance with a magnitude of a current to be measured. The current sensor includes a conductor through which a current flows, magnetic sensors, and correctors. The magnetic sensors detect a strength of a magnetic field generated by the current and output an output voltage corresponding to the strength of the magnetic field as the output voltage from the current sensor. The correctors each correct fluctuations in magneto-electric conversion gains of the magnetic sensors caused by a change in an ambient temperature and fluctuations in the output voltages from the magnetic sensors caused by deformation of the conductor due to a change in the ambient temperature.
Claims20
A current sensor which outputs an output signal in accordance with a magnitude of a current to be measured, the current sensor comprising:
- a conductor through which the current flows;
- a magnetic device that detects a strength of a magnetic field generated by the current and outputs an electric signal corresponding to the strength of the magnetic field as the output signal;
- and
- a corrector that corrects fluctuations in a magneto-electric conversion gain of the magnetic device caused by a change in an ambient temperature and fluctuations in the electric signal of the magnetic device caused by deformation of the conductor due to a change in the ambient temperature.
Dependencies are inferred from the claim text.