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    Unijunction transistor circuit with improved recovery
    6.
    发明授权
    Unijunction transistor circuit with improved recovery 失效
    具有改进恢复的非线性晶体管电路

    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.

    Percentage elongation calibrated digital pulse deleter
    7.
    发明授权
    Percentage elongation calibrated digital pulse deleter 失效
    PERCENTAGE ELONGATION CALIBRATED DIGITAL PULSE DELETER

    公开(公告)号：US3655950A

    公开(公告)日：1972-04-11

    申请号：US3655950D

    申请日：1969-10-22

    Applicant: CUTLER HAMMER INC

    Inventor： GREENING DONALD J ,  KINTNER PAUL M ,  STRAND SANFORD M

    IPC: B21B37/46 ,  G06F7/68 ,  H02P5/50 ,  H03K13/258 ,  B21B37/00

    CPC classification number: G06F7/68 ,  B21B37/46 ,  B21B2265/18 ,  H02P5/51 ,  Y10S388/912

    Abstract: A digital pulse deleter for use with digital control systems of electric motors driving work stand rolls in processing lines to afford selective adjustment of motor speeds calibrated in terms of percentages of elongation between successive work stands. The deleter can be adjusted by readily made changes in electrical interconnections to be determinative of what percentage of input pulses will and what percentage of such pulses will not be subject to deletion by selector switches. Operation of the selector switch permits selection of the increments of pulses subject to deletion that will be actually deleted with such increments being calibrated as a percentage or a per unit value of elongation or draw. The percentage of total deleter input pulses not subject to deletion is determinative of the maximum elongation or draw ratio to which the deleter will be so calibrated.

    Abstract translation: 一种用于电动马达的数字控制系统的数字脉冲去除器，用于驱动处理线中的工作台辊，以提供根据连续工作台之间的伸长百分比校准的电机速度的选择性调节。 可以通过容易地进行电互连的改变来调节去除器，以确定输入脉冲的百分比将是什么，并且这些脉冲的百分比将不会被选择器开关删除。 选择开关的操作允许选择将被删除的脉冲的增量，这些脉冲将被实际删除，其中这些增量被校准为百分比或单位延伸率或拉伸值。 总体去除输入脉冲不被删除的百分比决定了去除器将如此校准的最大伸长率或拉伸比。

    Motor speed control system with timed speed reference clamp and speed error spill-through circuit
    9.
    发明授权
    Motor speed control system with timed speed reference clamp and speed error spill-through circuit 失效
    具有定时速度参考钳位和速度错误溢出电路的电机速度控制系统

    公开(公告)号：US3900781A

    公开(公告)日：1975-08-19

    申请号：US37398973

    申请日：1973-06-27

    Applicant: CUTLER HAMMER INC

    Inventor： SMITH CHARLES E ,  HINK KARL M ,  GREENING DONALD J ,  GREENING EXECUTRIX BY DOROTHY

    IPC: H02P7/292 ,  H02P7/30

    CPC classification number: H02P7/293

    Abstract: A D.C. motor control system of the closed loop regulating type is disclosed. The system includes a timed speed reference circuit with means for clamping the same to hold the speed reference voltage change at a rate that corresponds to the rate of motor speed change when armature current limit action occurs during acceleration and deceleration periods of the motor. A speed error spill-through circuit is also provided to increase the proportional speed gain of the system when the speed error increases beyond a given percentage of base speed to afford improved damping characteristics and reduce overshoot or undershoot of the overall motor drive.

    Single-phase full-wave regenerative scr shunt motor control system
    10.
    发明授权
    Single-phase full-wave regenerative scr shunt motor control system 失效
    单相全波浪再生SCR控制电机控制系统

    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。

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