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    • 7. 发明授权
    • Device and method for reducing a magnetic unidirectional flux fraction in the core of a transformer
    • 用于减小变压器铁心中的单向磁通分数的装置和方法
    • US09046901B2
    • 2015-06-02
    • US13876946
    • 2010-09-29
    • Peter HambergerAlbert Leikermoser
    • Peter HambergerAlbert Leikermoser
    • G05F7/00H01F27/38H01F27/33H01F27/42H01F29/14
    • G05F7/00H01F27/33H01F27/38H01F27/42H01F2029/143
    • A device for reducing a magnetic unidirectional flux fraction in the core of a transformer is provided. The device has a measuring device that provides a sensor signal corresponding to the magnetic unidirectional flux fraction, a compensation winding that is magnetically coupled to the core of the transformer, a switching unit arranged electrically in a current path in series with the compensation winding in order to feed a current into the compensation winding. The action of the current is directed opposite to the unidirectional flux fraction. The switching unit can be controlled by a regulating variable provided by a control device and can be switched into a conductive state during a predefined time interval and in accordance with the regulating variable, the switch-on time being mains-synchronous. A device for limiting the current in the current path is provided and the sensor signal is fed to the control device.
    • 提供一种用于降低变压器的磁芯中的单向磁通分数的装置。 该装置具有测量装置,其提供对应于磁单向通量分数的传感器信号,磁耦合到变压器的磁芯的补偿绕组,按顺序与补偿绕组串联在电流路径中的电流路径的开关单元 将电流馈入补偿绕组。 电流的作用与单向通量分数相反。 开关单元可以由控制装置提供的调节变量来控制,并且可以在预定义的时间间隔内根据调节变量切换到导通状态,开关时间是电源同步的。 提供用于限制电流路径中的电流的装置,并将传感器信号馈送到控制装置。