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Demans for the dc current sensor have been increasing recently. We have developed a hysteresis free current sensor based on a magnetic bridge by using a magnetic fluid as a core material which is supe...rparamagnetic and has on magnetic hysteresis. In the experiment, the core size is 42mm in outer diameter,28mm in inner diameter, 3.5mm in height. The sensor gets saturated at ±200 A input currennt, but hysteresis was not observed in the whole measurement range. In the measurement range of ±20 A, the sensitivity was 0.603 mV/A, the linearity error was ±0.7%, and the temperature error characteristic was -0.2 %/°C at from 0 °C to 30 °C. This hysteresis free current sensor would be useful in energe efficient power systems for accurate cuurent monitoring, especially dc power distribution systems.続きを見る
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Mendeley出力
full-31-4-1