公开(公告)号：US4363064A

公开(公告)日：1982-12-07

申请号：US287005

申请日：1981-07-27

申请人： William W. Billings ,  James T. Mitchell ,  Richard E. Luebrecht

发明人： William W. Billings ,  James T. Mitchell ,  Richard E. Luebrecht

IPC分类号： H02H1/06 ,  H02H3/093 ,  H02H3/08 ,  H02H7/20

CPC分类号： H02H1/06 ,  H02H3/093

摘要： An overcurrent protection system adaptable for use with power controllers the single or multi-phase ac, or dc types includes a load current sensing element in combination with an overcurrent sensing/inverse time delay circuit, a power switch and a crowbar circuit. The system also includes a drive circuit, a drive circuit input current sensor, a trip signal detector and a logic circuit. The overcurrent protection system, according to the present invention, uses the drive circuit to power the overcurrent sensing/inverse time delay circuit, to drive the power switch, and to provide a coupling path for an overcurrent fault signal across electrical isolation interface(s) thereof to the logic circuit. Thus, the need for a separate isolated power supply for powering the overcurrent sensing/inverse time delay circuit and the need for separate optical and/or electromagnetic isolation interfaces for coupling of the overcurrent fault signal are eliminated.

摘要翻译： 适用于单相或多相交流或直流型功率控制器的过电流保护系统包括负载电流检测元件，与过电流检测/反时限延迟电路，电源开关和急停电路组合。 该系统还包括驱动电路，驱动电路输入电流传感器，跳闸信号检测器和逻辑电路。 根据本发明的过电流保护系统使用驱动电路为过流检测/反时延延迟电路供电，以驱动电源开关，并且提供跨过电隔离接口的过电流故障信号的耦合路径， 到逻辑电路。 因此，消除了对过电流感测/反时间延迟电路供电的单独隔离电源的需要以及用于耦合过电流故障信号的分离的光学和/或电磁隔离接口的需要。

公开(公告)号：US4245184A

公开(公告)日：1981-01-13

申请号：US23361

申请日：1979-03-23

申请人： William W. Billings ,  Richard E. Luebrecht

发明人： William W. Billings ,  Richard E. Luebrecht

IPC分类号： H03K17/13 ,  H03K17/292 ,  H03K17/725 ,  G05F3/04

CPC分类号： H03K17/292 ,  H03K17/13

摘要： A solid-state circuit breaker is provided with circuitry for permitting off/on/reset operations actuated by a mechanical toggle control switch for close simulation of magnetic circuit breaker operation. A power continuity feature is provided for load power by locating the control switch so that it opens all of the circuit, except the static power switch branch, between the source and the load, to provide a high degree of fail-safe protection for the apparatus. The power continuity feature includes means for zero crossover synchronization both upon power-up and power-down conditions. A circuit lockout feature is used so that on power-up or turn-on, operation is delayed until the occurrence of an internal power-ready condition. On power-down or turn-off, there is means for circuit retention subsequent to switch opening and internal power removal in order to accomplish load turn-off at a desired zero crossover point of the load power through the power switch. A power supply is incorporated that does not require stepdown or isolation transformers and improves capability for miniaturization of the overall circuitry and enables design of the circuit for operation at any of a wide range of frequencies.

摘要翻译： 固态断路器设置有用于允许通过机械拨动控制开关致动的关闭/接通/复位操作的电路，用于紧密模拟磁断路器操作。 通过定位控制开关来提供负载功率的电源连续性特性，使其打开源和负载之间的静态电源开关分支以外的所有电路，为设备提供高度的故障安全保护 。 电源连续性功能包括在上电和掉电条件下进行零交叉同步的装置。 使用电路锁定功能，以便在上电或开启时，延迟操作直到发生内部电源就绪状态。 在断电或关断时，有一些开关断开和内部电源切断后的电路保持装置，以便通过电源开关在负载电源的所需零交叉点完成负载关断。 并入电源，不需要降压或隔离变压器，并提高了整个电路的小型化能力，并使电路设计能够在任何一个频率范围内进行工作。