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    • 91. 发明申请
    • CIRCUIT PROTECTION
    • 电路保护
    • US20070165348A1
    • 2007-07-19
    • US11561608
    • 2006-11-20
    • Paul D. NelsonRobert L. HancockSteven W. Lewis
    • Paul D. NelsonRobert L. HancockSteven W. Lewis
    • H02H3/08
    • H02H3/087
    • A circuit which is configured for connection between a voltage source and a load, and which is configured to function as an automatic, re-settable fuse with regard to providing current to the load. The circuit includes a switch and sensor, such as a field effect transistor (FET), which is connected to the voltage source and the load and which is configured to selectively provide current to the load, depending on whether an overload condition exists. There is circuitry in communication with the FET which is configured to periodically send pulses to the FET in an attempt to re-set the switch and sensor during an overload condition. The circuit is configured to stop providing current to the load during an overload condition, but is configured to provide current to the load upon the overload condition being rectified. The circuitry which is in communication with the field effect transistor and which is configured to periodically send pulses thereto includes a timing circuit and an oscillator. Also included is a circuit speed controller which is configured to control how often the pulses are provided to field effect transistor.
    • 一种被配置用于在电压源和负载之间连接的电路,其被配置为用作向负载提供电流的自动可重新设置的保险丝。 电路包括开关和传感器,例如场效应晶体管(FET),其连接到电压源和负载,并且被配置为根据是否存在过载条件来选择性地向负载提供电流。 与FET通信的电路被配置为周期性地向FET施加脉冲以试图在过载状态期间重新设置开关和传感器。 电路被配置为在过载状态期间停止向负载提供电流,但是被配置为在过载条件被整流时向负载提供电流。 与场效应晶体管通信并被配置为周期性地向其发送脉冲的电路包括定时电路和振荡器。 还包括电路速度控制器,其被配置为控制脉冲提供给场效应晶体管的频率。