公开(公告)号：US3444490A

公开(公告)日：1969-05-13

申请号：US3444490D

申请日：1966-09-30

Applicant: WESTINGHOUSE ELECTRIC CORP

Inventor： KRUMMEL DONALD E ,  BOWLES DAVID L

IPC: H01F7/122 ,  H01F7/124 ,  H01F7/16 ,  H01H50/20 ,  H01H50/22 ,  H01H51/22 ,  H01H67/02 ,  H01H9/20

CPC classification number: H01H51/2209 ,  H01F7/122 ,  H01F7/124 ,  H01F7/1615 ,  H01F7/1646 ,  H01H50/20 ,  H01H50/22

公开(公告)号：US3921038A

公开(公告)日：1975-11-18

申请号：US44387574

申请日：1974-02-19

Applicant: WESTINGHOUSE ELECTRIC CORP

Inventor： KERNICK ANDRESS ,  ROSA JOHN ,  BOWLES DAVID L

IPC: H02H9/02 ,  H02H7/10

CPC classification number: H02H9/02

Abstract: A solid state or static current limiter which provides a relatively low impedance electrical current conducting path between a source of power and a load or between two interconnected sources or networks during non-overload conditions. The main current carrying device comprises a thyristor or similar gated element which is shunted by an auxiliary circuit which includes a capacitive element, a controlled thyristor and an inductance element. The capacitive element is shunted by a current limiting circuit which cooperates with the capacitive element to limit current in the load once the main current carrying thyristor has been turned off and the current flowing therethrough has been commutated into the auxiliary circuit as when an overload or short circuit condition has been sensed in the load. The rate of turnoff of the main thyristor is limited primarily by the inductive element in the auxiliary circuit. The inductive element need not carry appreciable load current for an extended period of time as the main current limiting function for the circuit is provided by forward biasing a diode which is connected in series with a current limiting capacitor shortly after the main thyristor has been turned off.

Abstract translation: 固态或静态限流器，其在非过载条件下提供功率源和负载之间或两个互连的源或网络之间的相对低阻抗的电流传导路径。 主载流装置包括由包括电容元件，受控晶闸管和电感元件的辅助电路分流的晶闸管或类似的门控元件。 电容元件由电流限制电路分流，该电流限制电路与电容元件配合，一旦主电流承载晶闸管已经关闭并且流过其中的电流已经被转换到辅助电路中，就会限制负载中的电流，如过载或短路 在负载中已经检测到电路状况。 主晶闸管的关断速率主要由辅助电路中的电感元件限制。 电感元件不需要延长的负载电流，因为电路的主要限流功能是通过在主晶闸管关断后不久与限流电容串联连接的二极管来提供的 。