公开(公告)号：US5309068A

公开(公告)日：1994-05-03

申请号：US20034

申请日：1993-02-19

申请人： Simo P. Hakkarainen ,  David G. Luchaco ,  Scott McConnell

发明人： Simo P. Hakkarainen ,  David G. Luchaco ,  Scott McConnell

IPC分类号： H01H9/54 ,  H01H47/00 ,  H01H47/32 ,  H05B41/36 ,  H05B41/14

CPC分类号： H05B41/36 ,  H01H9/542

摘要： In a fluorescent lighting controller, a switching circuit operates to selectively couple a bank of electronic ballasts to an AC power source (100-277 Volts, 50-60 Hertz). The switching circuit comprises a pair of relays, preferably connected in parallel, with one of such relays having a controllably conductive device, such as an electronic switch, and preferably a triac, connected in series therewith. With the relays open, an air gap isolates the power source and ballasts. In closing the relays in sequence, one relay provides a conductive path from the power source to the triac. After a suitable delay to allow the relay contacts to stabilize in the closed position, the triac is triggered to provide a conductive path from the power source to the ballasts, and a large current surge (as much as 300 amps) flow to the ballasts. After the current surge has subsided, the other relay is closed to provide a direct conductive path between the power source and ballasts. As a result of this arrangement, the switching circuit is low cost, compact and reliable over an extended period of time.

摘要翻译： 在荧光照明控制器中，开关电路用于选择性地将一排电子镇流器耦合到AC电源（100-277伏，50-60赫兹）。 开关电路包括一对优选地并联连接的一对继电器，其中一个这样的继电器具有可控制导电的装置，例如电子开关，并且优选与三端双向可控硅串联连接。 继电器断开时，气隙隔离电源和镇流器。 在继电器顺序关闭时，一个继电器提供从电源到三端双向可控硅开关元件的导电路径。 在允许继电器触点稳定在闭合位置的适当延迟之后，触发三端双向可控硅开关以提供从电源到镇流器的导电路径，并且大电流浪涌（多达300安培）流向镇流器。 在电流浪涌消退之后，另一个继电器闭合以在电源和镇流器之间提供直接的导电路径。 作为这种安排的结果，开关电路在较长的时间周期内是低成本的，紧凑的和可靠的。