公开(公告)号：US4152637A

公开(公告)日：1979-05-01

申请号：US808067

申请日：1977-06-20

申请人： George A. Oberbeck ,  William E. Stanton ,  Andrew W. Stewart

发明人： George A. Oberbeck ,  William E. Stanton ,  Andrew W. Stewart

IPC分类号： H02H9/02 ,  G05F1/22 ,  G05F1/00

CPC分类号： H02H9/021

摘要： A saturable reactor device for limiting alternating and direct current in an external electric circuit. In one form, the required magneto-motive force (mmf) bias for the saturable reactor is provided by a controllable flux bias element in order to minimize the required bias power. A current sensor provides a control signal representative of the alternating or direct current passing between the source and the load. This signal is used to control the magnitude of the bias so that the mmf provided by the bias element is a function of the current driving the load, permitting a current limiting threshold at a predetermined percentage of the current applied to the load. In an alternate form, the device may be adapted to limit bipolar current in the external circuit. In this form, the device includes an input circuit and an associated direct current saturable reactor limiter. In response to direct current of either positive or negative polarity passing through the external circuit, unidirectional current is driven through the input coil of the direct current limiter. The magnitude of the unidirectional current passing through the input coil is proportional to the magnitude of the current provided by the source. When the unidirectional current exceeds a predetermined threshold, the direct current limiter effectively provides a relatively high current-limiting impedance between the source and load of the external electric circuit. When the unidirectional current is below that threshold, the direct current limiter has minimal effect on the external electric circuit.

摘要翻译： 用于限制外部电路中的交流和直流电流的可饱和电抗器装置。 在一种形式中，可饱和电抗器所需的磁动力（mmf）偏压由可控的磁通偏置元件提供，以便使所需的偏置功率最小化。 电流传感器提供表示在源极和负载之间通过的交流或直流电流的控制信号。 该信号用于控制偏置的幅度，使得由偏置元件提供的mmf是驱动负载的电流的函数，允许以施加到负载的电流的预定百分比的限流阈值。 在替代形式中，该装置可适于限制外部电路中的双极性电流。 在这种形式中，该装置包括输入电路和相关的直流可饱和电抗器限制器。 响应于通过外部电路的正或负极性的直流电流，单向电流通过直流限制器的输入线圈驱动。 通过输入线圈的单向电流的幅度与由源提供的电流的大小成比例。 当单向电流超过预定阈值时，直流限流器在外部电路的源极和负载之间有效提供相对较高的限流阻抗。 当单向电流低于该阈值时，直流限制器对外部电路的影响最小。