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    • 7. 发明公开
    • ELECTROMAGNETIC INDUCTIVE LOAD CONTROL DEVICE
    • ELEKTROMAGNETISCHE INDUKTIVE LASTSTEUERUNGSVORRICHTUNG
    • EP2940867A1
    • 2015-11-04
    • EP13869847.7
    • 2013-11-28
    • Yazaki Corporation
    • MORIMOTO, MitsuakiOISHI, Eiichiro
    • H03K17/16H03K17/695
    • H01H47/325H01H50/16H03K17/165
    • With a relay control device (1) according to an embodiment, a regenerative current from a relay coil (5b) which is disposed in a relay (5) flows through a coil energy absorption circuit (7), which is connected to the low side of the relay coil (5b), toward the ground. A current detection resistor (Rsens), which is a shunt resistor, is connected further toward the ground side of the coil energy absorption circuit (7) than a coil surge absorption resistor (Rsup), and the potential (Vsens) of the current detection resistor (Rsens) is compared to a reference potential (Vref), with a current detection circuit (13). Furthermore, on the basis of the result of the comparison with the current detection circuit (13), an off-duty period of the PWM control is terminated before the current (Icoil) which flows through the relay coil (5b) becomes less than or equal to a minimum drive current (Iset).
    • 根据实施例的继电器控制装置(1),设置在继电器(5)中的继电器线圈(5b)的再生电流流过线圈能量吸收电路(7),该线圈能量吸收电路连接到低压侧 的继电器线圈(5b)。 作为分流电阻器的电流检测电阻器(Rsens)比线圈浪涌吸收电阻器(Rsup)进一步连接到线圈能量吸收电路(7)的接地侧,电流检测电位(Vsens) 用电流检测电路(13)将电阻(Rsens)与参考电位(Vref)进行比较。 此外,基于与电流检测电路(13)进行比较的结果,在流过继电器线圈(5b)的电流(Icoil)变得小于或等于(或者)的情况下,PWM控制的关闭周期终止, 等于最小驱动电流(Iset)。