| 摘要 |
<p>PURPOSE:To provide an ammeter which can be mounted on a device with only a single power supply by giving a flux in both forward and backward directions to a core with the single power supply and canceling the flux which is generated at the core by charge/discharge current of a bus. CONSTITUTION:A core 3 where a charge line 3 is inserted is provided with a Hall element 2 in a gap. Then, a balanced circuit 6 switches conduction of first and second coils 4 and 5 according to the output of the Hall element and then gives a balanced current according to the output of the hole element 2, thus giving a flux in both forward and backward directions to the core 3 with a battery of a single power supply and then cancels out flux which is generated at the core 3 by charge/discharge current of the charge line 9.</p> |
