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    A Fluxgate Current Sensor With an Amphitheater Busbar

    機譯:帶圓形劇場母線的磁通門電流傳感器

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    Large dc and ac electric currents are often measured by open-loop sensors without a magnetic yoke. A widely used configuration uses a differential magnetic sensor inserted into a hole in a flat busbar. The use of a differential sensor offers the advantage of partial suppression of fields coming from external currents. Hall sensors and AMR sensors are currently used in this application. In this paper, we present a current sensor of this type that uses novel integrated fluxgate sensors, which offer a greater range than magnetoresistors and better stability than Hall sensors. The frequency response of this type of current sensor is limited due to the eddy currents in the solid busbar. We present a novel amphitheater geometry of the hole in the busbar of the sensor, which reduces the frequency dependence from 15% error at 1 kHz to 9%.
    機譯:大的直流和交流電流通常由無磁軛的開環傳感器測量。廣泛使用的配置是將差分磁傳感器插入扁平母線的孔中。使用差分傳感器的優點是部分抑制了來自外部電流的磁場。當前在此應用中使用霍爾傳感器和AMR傳感器。在本文中,我們介紹了一種使用新型集成磁通門傳感器的此類電流傳感器,該傳感器提供的范圍比磁阻電阻大,并且比霍爾傳感器具有更好的穩定性。由于實心母線中的渦流,這種電流傳感器的頻率響應受到限制。我們介紹了傳感器母線孔的新型圓形劇場幾何形狀,它將頻率依賴性從1 kHz時的15%誤差降低到9%。

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