公开(公告)号：WO1994019816A1

公开(公告)日：1994-09-01

申请号：PCT/US1994001326

申请日：1994-02-07

Applicant: LUTRON ELECTRONICS CO. INC.

Inventor： LUTRON ELECTRONICS CO. INC. ,  HAKKARAINEN, Simo, P. ,  LUCHACO, David, G. ,  McCONNELL, Scott

IPC: H01H09/54

CPC classification number: H05B41/36 ,  H01H9/542

Abstract: In a fluorescent lighting controller, a switching circuit operates to selectively couple a bank of electronic ballasts (36) to an AC power source (34). The switching circuit comprises a pair of relays (RL3, RL4), preferably connected in parallel, with one of such relays having a controllably conductive device (Q1), 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 (RL3) 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) flows to the ballasts. After the current surge has subsided, the other relay (RL4) 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.

Abstract translation: 在荧光照明控制器中，开关电路操作以选择性地将一组电子镇流器（36）耦合到AC电源（34）。 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（Q1），例如电子开关，并且优选与三端双向程序串联连接。 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（RL3）提供从电源到三端双向可控硅开关的导电路径。 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，并且大的电流浪涌（高达300安培）流向镇流器。 在电流浪涌消退之后，另一个继电器（RL4）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。