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    • 4. 发明专利
    • Power generator for vehicle
    • 汽车发电机
    • JP2012228033A
    • 2012-11-15
    • JP2011092172
    • 2011-04-18
    • Denso Corp株式会社デンソー
    • KANEDA YOSHIMASAOKAMOTO TOMOYA
    • H02P9/10H02P9/04
    • H02P9/10
    • PROBLEM TO BE SOLVED: To provide a power generator for a vehicle, which can promptly shut off the generation of a high voltage when a load dump occurs and prevent false operation due to false detection of a power generation stop state.SOLUTION: The power generator 1 for a vehicle comprises: a field winding 102; an armature winding 101; a bridge circuit 103; a rotation detection circuit 205 for detecting the presence or absence of a rotation on the basis of a phase voltage; an excitation current control circuit 213 for keeping an output voltage to a regulated voltage when detecting the rotation; overvoltage detection circuits 214 and 105 for detecting an overvoltage when an output voltage exceeds a threshold voltage V2; a bridge-control circuit 104 for performing on-off control of a MOS transistor when detecting no overvoltage and continuing to turn on the MOS transistor when detecting the overvoltage; and a rotation-output keeping circuit 206 for, when detecting no overvoltage, outputting an output signal from the rotation detection circuit 205 toward the excitation current control circuit 213, and when detecting the overvoltage, outputting a signal for keeping the content of the rotation detection by the rotation circuit 205 at that time toward the excitation current control circuit 213.
    • 要解决的问题:提供一种用于车辆的发电机,其可以在发生负载突降时迅速地切断高电压的产生,并且防止由于发电停止状态的错误检测而导致的错误操作。 解决方案:用于车辆的发电机1包括:励磁绕组102; 电枢绕组101; 桥接电路103; 旋转检测电路205,用于基于相电压来检测是否有旋转; 励磁电流控制电路213,用于在检测旋转时将输出电压保持在稳定电压; 用于当输出电压超过阈值电压V2时检测过电压的过电压检测电路214和105; 桥式控制电路104,用于当检测到无过电压时,对MOS晶体管进行开关控制,并在检测到过电压时继续导通MOS晶体管; 以及旋转输出保持电路206,当检测不到过电压时,将来自旋转检测电路205的输出信号输出到励磁电流控制电路213,并且当检测到过电压时,输出用于保持旋转检测的内容的信号 通过旋转电路205在此时朝向励磁电流控制电路213。版权所有:(C)2013,JPO&INPIT