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    • 4. 发明授权
    • Ground fault detection circuit, and power supply device
    • 接地故障检测电路和电源设备
    • US08791702B2
    • 2014-07-29
    • US13256386
    • 2010-08-11
    • Hikaru MiuraAkihiko Kudou
    • Hikaru MiuraAkihiko Kudou
    • G01N27/416H02J7/00
    • H02H7/18B60L3/0069G01R31/025H02H3/17
    • A ground fault detection circuit according to the present invention is a ground fault detection circuit that detects the occurrence of a ground fault of a battery that is insulated, and that includes: an AC signal generation section that generates an AC signal; a first capacitive element that couples the AC signal generated by the AC signal generation section to the battery; a voltage division section that voltage divides the AC signal that is coupled to the battery by the first capacitive element; a ground fault detection unit that detects a ground fault of the battery based on an AC component of an input signal; and a second capacitive element that couples the AC signal that has been voltage divided by the voltage division section to the ground fault detection unit as the input signal.
    • 根据本发明的接地故障检测电路是检测绝缘电池的接地故障的发生的接地故障检测电路,其包括:产生AC信号的AC信号生成部; 第一电容元件,其将由AC信号产生部分产生的AC信号耦合到电池; 电压分割部,其将所述第一电容元件与所述电池连接的所述交流信号进行分压; 接地故障检测单元,其基于输入信号的AC分量来检测电池的接地故障; 以及将已经被分压部分电压分压的AC信号耦合到接地故障检测单元的第二电容元件作为输入信号。
    • 8. 发明申请
    • EARTH FAULT DETECTION CIRCUIT AND POWER SOURCE DEVICE
    • 接地故障检测电路和电源设备
    • US20140049860A1
    • 2014-02-20
    • US13961402
    • 2013-08-07
    • Hitachi Vehicle Energy, Ltd.
    • Tomoyuki ARIMAAkihiko KUDO
    • G01R31/02H02H3/16
    • G01R31/025H02H3/16
    • An earth fault detection circuit for detecting an earth fault between a high-voltage battery and a motor includes: an A.C. signal generation portion generating an A.C. signal; a first capacitive element between the A.C. signal generation portion and one end side of the high-voltage battery; a voltage dividing circuit dividing a voltage on the one end side of the high-voltage battery; an earth fault detection portion detecting the earth fault between the high-voltage battery and the motor based on an earth fault detection signal inputted thereto; and a second capacitive element inputting an A.C. component of the voltage, on the one end side of the high-voltage battery, which is obtained by the voltage division in the voltage dividing circuit as the earth fault detection signal to the earth fault detection portion.
    • 用于检测高压电池和电动机之间的接地故障的接地故障检测电路包括:产生交流信号的交流信号产生部; 交流信号产生部分和高电压电池的一端之间的第一电容元件; 分压高压电池的一端侧的电压的分压电路; 接地故障检测部,根据输入的接地故障检测信号,检测高电压电池与电动机之间的接地故障; 以及第二电容元件,其通过在分压电路中的分压而获得的高压电池的一端侧的电压的交流分量作为接地故障检测信号输入到接地故障检测部。