| 摘要 |
PROBLEM TO BE SOLVED: To provide a current detection structure which allows use of a highly sensitive magnetic detection element even when current flowing through a bus bar is large, and thus enables highly accurate measurement.SOLUTION: A current detection structure includes; a bus bar 2 through which current flows; a magnetic detection element 3 for measuring intensity of a magnetic field generated by the current flowing through the bus bar 2; and a current detection unit 7 which determines the level of the current flowing through the bus bar 2 based the magnetic field measured by the magnetic detection element 3. In the bus bar 2, a through-hole 4 formed therethrough with a resultant current path 5, 6 formed on each side of the through-hole 4. The magnetic detection element 3 is located in the through-hole 4. The current detection unit 7 determines the level of the current flowing through the bus bar 2 based on intensity of a composite magnetic field of magnetic fields generated by currents flowing through the current paths 5, 6 on both sides of the through-hole 4 and detected by the magnetic detection element 3. |
