A gauge that measures the amount of magnetic flux (SI units are Weber, Wb) passing through a coil or an iron core, or its changes. It is similar to a magnetometer that measures the strength of a magnetic field (SI units are amperes per meter, A/m), but whereas a magnetometer measures the strength and direction of a magnetic field in space, a fluxmeter measures the total amount of magnetic flux passing through a specific object, and is used to measure the properties of magnetic materials such as the iron core of a transformer (magnetic susceptibility, hysteresis, etc.). In principle, it integrates and displays the electromotive force induced in a detection coil by the change in magnetic flux over time, and there are various types depending on the purpose of the measurement and the required accuracy. [Mitsui Kiyoto] [Reference] | |Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend |
コイルや鉄心などを通る磁束の量(国際単位系=SI単位はウェーバーWb)またはその変化を測定する計器。磁場の強さ(SI単位はアンペア毎メートルA/m)を測定する磁力計と類似しているが、磁力計が空間における磁場の強さと方向を測定する計器であるのに対し、磁束計は特定の物体中を通る磁束の総量を測定するものであり、たとえば変圧器の鉄心などの磁性材料の特性(磁化率、ヒステリシス=履歴現象など)の測定に用いられる。原理としては、磁束の時間的変化によって検出コイル中に誘導される起電力を積分して表示するもので、測定の目的や必要精度に応じていろいろな型式がある。 [三井清人] [参照項目] | |出典 小学館 日本大百科全書(ニッポニカ)日本大百科全書(ニッポニカ)について 情報 | 凡例 |
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