公开(公告)号：US3681624A

公开(公告)日：1972-08-01

申请号：US3681624D

申请日：1970-12-17

Applicant: CUTLER HAMMER INC

Inventor： ALLISON ARTHUR F ,  GREENING DONALD J ,  MOLLGAARD ANTON N

IPC: H03K3/351 ,  H03K19/08

CPC classification number: H03K3/351

Abstract: A negative resistance circuit such as a pulse-forming or relaxation oscillator circuit employing a unijunction transistor as the negative resistance element and adapted for firing an SCR or the like. The tendency of the negative resistance element to fail to recover to non-conducting condition after it has been triggered into conduction, due to a low valley current characteristic, is overcome by an improved recovery circuit that uses the interbase current to reduce the input current.

公开(公告)号：US3675104A

公开(公告)日：1972-07-04

申请号：US3675104D

申请日：1970-12-17

Applicant: CUTLER HAMMER INC

Inventor： ALLISON ARTHUR F ,  GREENING DONALD J ,  MOLLGAARD ANTON N

IPC: H02P7/292 ,  H02P5/16

CPC classification number: H02P7/293 ,  Y10S388/917 ,  Y10S388/934

Abstract: A single-phase full-wave regenerative SCR (silicon controlled rectifier) drive having a series and shunt, T-network, reactor configuration, minimum firing of both forward and regenerative SCR''s, and current feedback regulation. The reactor configuration along with the controlled minimum firing angle assures continuous current through the motor armature over substantially the entire load range except for the low 10 to 20 percent whereas normally continuous current occurred only in about the upper half of the load range. This allows the current regulator to be designated for continuous current rather than discontinuous current, having higher gain, and affording better control. By continuous current, heating also is reduced.

Abstract translation: 具有串联和分流，T网络，电抗器配置的单相全波再生SCR（可控硅整流器）驱动器，正向和再生SCR的最小点火以及电流反馈调节。 电抗器配置以及受控的最小触发角确保了连续电流通过电机电枢在基本上整个负载范围内，除了低10至20％之间，而正常连续电流只发生在负载范围的上半部分左右。 这允许将电流调节器指定为连续电流而不是不连续电流，具有较高的增益，并提供更好的控制。 通过连续电流，加热也减少。