CURRENT SENSOR

To solve the problem that although there is a growing demand on the market for a current sensor capable of measuring a current with high accuracy, its measurement accuracy is poor especially when the temperature changes steeply and a trouble with charge/discharge management in a vehicle, etc., often occurs, calling for improvement.SOLUTION: Provided is a magnetic proportional current sensor composed of a hall sensor or a hall IC, wherein the hall sensor or the hall IC is installed in a gap of a core formed by laminating permalloy and silicon steel sheets and brought into mechanical or thermal contact with the core by a high heat conductive resin, etc., whereby heat followability is raised and it is possible to provide a current sensor having good sensitivity to even a sudden temperature change.SELECTED DRAWING: Figure 1 【課題】電流センサにおいて高精度で電流を計測する需要が市場より高まっているが特に急勾配で温度が変化する場合などの計測精度が悪く車両などの充放電管理に不具合が生じる場合が多く改善が求められている。【解決手段】ホールセンサまたはホールICにより構成される磁気比例式電流センサにおいて、パーマロイ、珪素鋼板などを積層して形成されるコアのギャップにホールセンサ又はホールICを設置し、熱伝導率の高い樹脂などで機械的、熱的にコアと接続する事で熱追従性を上げ急激な温度変化でも精度の良い電流センサを提供する事が可能となる。【選択図】図１