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46 条记录 (耗时 0.013 秒)

    Electrical proportional control system
    1.
    发明授权
    Electrical proportional control system 失效
    电子比例控制系统

    公开(公告)号：US3196255A

    公开(公告)日：1965-07-20

    申请号：US11338761

    申请日：1961-05-29

    申请人： GARRETT CORP

    发明人： BEAUCHAMP EDWARD D ,  SAULSON DONALD S ,  BENSON PAUL A

    IPC分类号： G05D23/24

    CPC分类号： G05D23/2456

    摘要： 1,010,668. Automatic temperature control systems. GARRETT CORPORATION. May 28, 1962 [May 29, 1961], No. 46156/64. Divided out of 1,010,667. Heading G3R. An automatic control system described for example in the parent Specification has a power limiting means comprising a load current transformer 27 developing a voltage across a resistor 93 to which is added a voltage from a resistor network 89, 90, the sum of the voltages being rectified by rectifier 95 and passed through zener diodes 96 to central winding 97 of a magnetic amplifier which when the sum of the voltages exceeds the threshold value of the zener diodes retards the firing point of thyristors or thyratrons 100, 101.

    Control device
    3.
    发明授权
    Control device 失效

    公开(公告)号：US3035143A

    公开(公告)日：1962-05-15

    申请号：US81562259

    申请日：1959-05-25

    申请人： COPPERWELD STEEL CO

    发明人： LEATHERMAN ALFRED F

    IPC分类号： A47G29/10 ,  G01J5/52 ,  G05D23/24 ,  G05D23/27

    CPC分类号： A47G29/10 ,  G01J5/52 ,  G05D23/1906 ,  G05D23/2456 ,  G05D23/27

    摘要： 954,634. Measuring thermal radiation. COPPERWELD STEEL CO. May 5, 1960 [May 25, 1959], No.15910/60. Heading G1A. [Also in Division G3] A workpiece 15 whose temperature is to be controlled is heated by an induction coil 32 energized from a generator 29, radiation from the workpiece being intercepted by a detector comprising a chopper 12 surface of which acts as a temperature reference source, a window 19 e.g. of arsenic trisulfide glass which is transparent to infra-red radiation between about one and ten microns, and a bolometer cell 16, supplied with D.C. from a power supply 22, which converts the signal received through the window 19 into an alternating voltage signal which is fed to an amplifier 20 the output of which is rectified by a doubler circuit 56 associated with a galvanometer 21 indicating the temperature of the workpiece 15. The output from the circuit 56 is fed to two magnetic amplifier stages 23, 24 and thence to a saturable reactor 25 which controls the D.C. supply to the field winding 30 of the generator 29; if the workpiece temperature varies, the resulting variation in field current changes the output of the generator and the heating action of the coil 32. The temperature of the workpiece 15 thus tends to remain constant.

    Reversing proportional process controller
    6.
    发明授权
    Reversing proportional process controller 失效
    反向比例过程控制器

    公开(公告)号：US3596195A

    公开(公告)日：1971-07-27

    申请号：US3596195D

    申请日：1968-09-18

    申请人： SP K BJURO POLUPROVODNIKOVYKH

    发明人： SHIRSHOV NIKOLAI MIKHAILOVICH ,  KARPOVA VLADIMIR GAVRILOVICH ,  LEONOV VITKTOR DMITRIEVICH ,  CHERNYAVSKY VYACHESLAV VIKTORO

    IPC分类号： G05D23/24 ,  H03F1/00

    CPC分类号： G05D23/2456

    摘要： A reversing proportional process controller is disclosed which is based on the adjustment of the current of a load. The controller comprises a bridge circuit with a controlled variable transmitter placed in one arm thereof, the bridge circuit being connected to a control signal amplifier, in turn connected to an auxiliary amplifier. A phase sensing unit is connected to the auxiliary amplifier and controls the operation of a switching unit which is connected to the control signal amplifier via a final control element which is constituted as a series combination of a magnetic amplifier and a power rectifier. The switching unit controls current flow to the load in order to rebalance the bridge circuit.