公开(公告)号：US3755712A

公开(公告)日：1973-08-28

申请号：US3755712D

申请日：1972-09-07

Applicant: SQUARE D CO

Inventor： DE VINEY T ,  BRENNAN R

IPC: H02H7/08 ,  H02H7/14

CPC classification number: H02H7/0833

Abstract: In a regenerative DC motor control, a line voltage failure during regeneration ordinarily results in a fault current of sufficient magnitude to damage any conducting thyristors or their protective fuses. To prevent such damage, a gate suppression circuit operates upon occurrence of a fault to prevent further firing of thyristors. A fault protection module controls the connection of a charged capacitor across the then-conducting thyristors at a predetermined time after the fault to permit resetting of those thyristors and prevent any damage to thyristors or fuses.

Abstract translation: 在再生直流电动机控制中，再生期间的线路电压故障通常导致足够大的故障电流，以损坏任何导电晶闸管或其保护熔断器。 为了防止这种损坏，门禁抑制电路在发生故障时操作，以防止晶闸管的进一步烧制。 故障保护模块在故障之后的预定时间控制充电的电容器在导通晶闸管之间的连接，以允许复位这些晶闸管并防止对晶闸管或熔丝的任何损坏。