| 摘要 |
PROBLEM TO BE SOLVED: To provide a current sensor capable of accurately measuring a frequency of a measurement object current even when the frequency is varied.SOLUTION: In a current sensor (101) which includes a flat current path (12) and a magnetoelectric transducer (13) disposed on the current path (12) to detect a magnetic field generated by flowing of a measurement object current in the current path (12) and measures a measurement object current of a device to which the current path (12) is connected, a long hole (12a) is provided in the current path (12) along a direction of flowing of the measurement object current, and the magnetoelectric transducer (13) is located at a position on the current path (12) where a minimum-frequency magnetic flux density being a magnetic flux density obtained in the case that the measurement object current at a minimum frequency for use in the device is made to flow and a maximum-frequency magnetic flux density being a magnetic flux density obtained in the case that the measurement object current at a maximum frequency for use in the device is made to flow, are approximately equal to each other. |
