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    • 5. 发明授权
    • Housekeeping power supply for electronically controlled loads
    • 电控负载的家用电源
    • US06509724B1
    • 2003-01-21
    • US09698794
    • 2000-10-27
    • Milan Zarko IlicFrank Jakob John Mueller
    • Milan Zarko IlicFrank Jakob John Mueller
    • G05F140
    • H05B41/3924H05B41/2853H05B41/2983
    • A circuit for loading the rectified AC voltage bus in a housekeeping power supply for an electronically controlled load is provided for avoiding large increases in the rectified AC bus voltage upon disconnecting the load. The load circuit includes a current sink, a relatively small energy storage capacitance, and a negative feedback circuit. The current sink includes a resistance coupled to the rectified AC voltage bus for sinking current whenever the semiconductor switch is on. When the semiconductor switch is off, the small capacitance discharges through the resistive voltage divider. When the voltage across the small capacitance decreases to a threshold mean AC rectified voltage bus value, then the negative feedback circuit provides sufficient current to turn the semiconductor switch back on and thus provide approximately the threshold mean AC rectified voltage bus value. Diodes are provided on the AC rectified voltage bus in order to ensure fast feedback and to separate the current sink resistance from the remainder of the housekeeping supply during normal circuit operation.
    • 提供了用于将整流的AC电压总线加载到用于电子控制负载的管理电源中的电路,用于避免在断开负载时整流的AC总线电压的大幅增加。 负载电路包括电流吸收器,相对较小的储能电容和负反馈电路。 电流吸收器包括耦合到整流的AC电压总线的电阻,用于每当半导体开关导通时吸收电流。 当半导体开关关闭时,小电容通过电阻分压器放电。 当小电容两端的电压降低到阈值平均值AC整流电压总线值时,负反馈电路提供足够的电流来使半导体开关重新导通,从而提供大致阈值平均AC整流电压总线值。 在交流整流电压总线上提供二极管,以确保在正常电路运行期间快速反馈并将电流吸收电阻与余下的电源分离。