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    • 2. 发明申请
    • ARRANGEMENT IN A CURRENT DETECTION CIRCUIT
    • 电流检测电路中的布置
    • WO1993001502A1
    • 1993-01-21
    • PCT/NO1992000107
    • 1992-06-16
    • ABB ENERGI ASSVOEN, Geir
    • ABB ENERGI AS
    • G01R15/02
    • G01R15/185H01F2038/305
    • The present invention relates to an arrangement in a current detection circuit, comprising a primary coil (A) for the current (Iprim) to be detected, a separate transformer core (K) which is influenced by the current (Iprim) of the primary coil (A), a secondary coil (B) conducting a transformed secondary current, as well as a tertiary coil (C) connected to an operational amplifier (Am) including a feed-back resistor (Rf) and constituting a current/voltage converter circuit (CC) with an input resistance of nearly zero ohms, and in order to provide a detection circuit which can more easily be manufactured integrally with a circuit board and at the same time give full temperature compensation, it is according to the present invention suggested that the secondary coil (B) comprises at least one end-less and terminal-free disc-shaped member (B1 and/or B2).
    • 本发明涉及一种电流检测电路中的布置,包括用于待检测电流(Iprim)的初级线圈(A),受初级线圈电流(Iprim)影响的单独变压器铁心(K) (A),传导变压二次电流的次级线圈(B)以及连接到包括反馈电阻(Rf)的运算放大器(Am)的三线圈(C),并构成电流/电压转换器电路 (CC),其输入电阻接近零欧姆,并且为了提供可以更容易地与电路板一体制造的检测电路,并且同时给予全温度补偿,根据本发明,建议 次级线圈(B)包括至少一个无端和无端子的盘形构件(B1和/或B2)。