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    • 5. 发明申请
    • CURRENT DETECTING DEVICE
    • 电流检测装置
    • US20150276816A1
    • 2015-10-01
    • US14441719
    • 2013-11-18
    • Panasonic Intellectual Property Management Co., Ltd.
    • Hiroshi YoshidaMasataka Kanda
    • G01R15/18G01R19/165G01R19/00
    • G01R15/185G01R19/0092G01R19/165G01R19/20
    • A first coil is wound around a first core, and have one end that is connected to ground and the other end that is connected to one end of a second coil. The second coil is wound around a second core, and has the one end that is connected to the first coil, and the other end that is connected to an excitation unit via a current-limiting resistor. A magnetic flux is generated in the first core by an excitation signal outputted from the excitation unit. Induced electromotive force is generated in the conductor due to the magnetic flux generated in the first core. The direction of the magnetic flux generated in the second core is opposite to the direction of the magnetic flux generated in the first core, and the induced electromotive forces of them generated in the conductor are cancelled each other out.
    • 第一线圈缠绕在第一芯上,并且具有连接到地的一端和连接到第二线圈的一端的另一端。 第二线圈缠绕在第二芯上,并且其一端连接到第一线圈,另一端经由限流电阻器连接到励磁单元。 通过从激励单元输出的激励信号在第一磁芯中产生磁通量。 由于在第一芯体中产生的磁通量,在导体中产生感应电动势。 在第二芯中产生的磁通的方向与在第一芯中产生的磁通的方向相反,并且导体中产生的感应电动势被抵消。