公开(公告)号：US3728611A

公开(公告)日：1973-04-17

申请号：US3728611D

申请日：1971-12-23

Applicant: ASEA AB

Inventor： ELVIN S

IPC: H01F29/04 ,  G05F1/20

CPC classification number: H01H9/0005 ,  H01F29/04 ,  H01H9/548 ,  H02P13/06

Abstract: A tap changer for switching the load current of a transformer from a first winding output to a second winding output includes two pairs of anti-parallel connected semi-conductor rectifiers with a control device for each pair. A switch arrangement is provided for connecting each of the pairs between any of the outputs and a load current connection. The device includes a control arrangement for controlling and performing the switch between the outputs, which includes a device for transmitting the load current from the rectifier pair connected to one winding output to the pair connected to an adjacent winding output. This transfer is carried out partly by natural commutation except when there is a decrease in the turns of the winding and at the same time a resistive load and partly by means of switching when the load current passes through zero upon a decrease in the turns of the winding and at the same time a resistive load.

Abstract translation: 用于将变压器的负载电流从第一绕组输出切换到第二绕组输出的分接开关包括两对反并联连接的半导体整流器，其具有用于每对的控制装置。 提供了一种开关装置，用于连接任何输出和负载电流连接中的每一对。 该装置包括用于控制和执行输出之间的开关的控制装置，其包括用于将连接到一个绕组输出的整流器对的负载电流传输到连接到相邻绕组输出的对的装置。 该转移部分地通过自然换向进行，除了当绕组的匝数减小并且同时存在电阻负载并且部分地通过在负载电流通过零时减小的情况下通过切换而进行的 并且同时具有电阻负载。