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425 条记录 (耗时 0.015 秒)

    Controlled-velocity drive
    51.
    发明授权
    Controlled-velocity drive 失效
    控制速度驱动

    公开(公告)号：US3617844A

    公开(公告)日：1971-11-02

    申请号：US3617844D

    申请日：1969-05-21

    申请人： EATON YALE & TOWNE

    发明人： GRYGERA JAMES W

    IPC分类号： H02P7/292 ,  H02P5/16

    CPC分类号： H02P7/293 ,  Y10S388/902 ,  Y10S388/917

    摘要： A DC controlled-velocity drive. An SCR power bridge is energized by a three-phase AC power source for supplying DC voltage to the armature of a DC drive motor when the SCR''s are triggered, shifting of the phase of triggering causing variation of the DC voltage for varying the motor speed. Various regenerative and degenerative feedback circuits are employed, among them being a feedback circuit sensing this DC voltage and a feedback circuit sensing the motor armature current. These feedback circuits produce feedback signals which are compared with motor speed and armature current reference signals for the purpose of controlling the phase of triggering of the SCR''s in order to maintain the motor speed substantially equal to a preselected motor speed while preventing the motor armature current from exceeding a predetermined maximum.

    Power amplifier control system
    53.
    发明授权
    Power amplifier control system 失效

    公开(公告)号：US3573500A

    公开(公告)日：1971-04-06

    申请号：US3573500D

    申请日：1969-01-24

    申请人： GEN ELECTRIC

    发明人： LEONARD CHARLES E

    IPC分类号： H02P7/292 ,  H03K17/00

    CPC分类号： H02P7/293

    摘要： A bidirectional motor control system and apparatus comprising a power amplifier utilizing a first pair of solid state controlled rectifiers for selective pulse frequency modulated motor operation in CCW or CW rotational direction, commutating circuit means for interruption of power from said first pair of controlled rectifiers, including a capacitor and at least one inductance, a second pair of solid state controlled rectifiers, signal supplying control means for selective and timed capacitor charge reversal, controlled rectifier triggering, steering of the commutating circuit output to the appropriate one of the first pair of controlled rectifiers, and lockout of the respective triggering signals.

    Dual converter having shared gate pulse generator
    54.
    发明授权
    Dual converter having shared gate pulse generator 失效
    具有共享门脉冲发生器的双转换器

    公开(公告)号：US3564371A

    公开(公告)日：1971-02-16

    申请号：US3564371D

    申请日：1968-11-13

    申请人： EMIL T SCHONHOLZER

    发明人： SCHONHOLZER EMIL T

    IPC分类号： H02P7/292 ,  H02P5/16

    CPC分类号： H02P7/293

    摘要： AN ELECTRICAL MOTOR DRIVE WHICH MAY BE OPERATED IN THE FORWARD OR REVERSE DIRECTION AND WHICH IS SUPPLIED FROM A POWER UNIT HAVING A FIRST SET OF THYRISTORS FOR SUPPLYING CURRENT IN THE FORWARD DIRECTION AND A SECOND SET OF THYRISTORS FOR SUPPLYING CURRENT IN THE REVERSE DIRECTION, AND WHEREIN A COMMON GATE PULSE GENERATOR IS SELECTIVELY CONNECTED BY A SWITCHING RELAY TO THE FORWARD OR REVERSE SET OF THYRISTORS DEPENDING UPON THE DIRECTION OF ROTATION DESIRED. THE SWITCHING RELAY, IN TURN, IS CONTROLLED BY A COMPARISON OF THE BUS BOLTAGE FROM THE MOTOR WITH THE OUTPUT VOLTAGE OF A VOLTAGE CONTROLLER FOR THE MOTOR. IN THIS MANNER, THE DEADBAND BETWEEN THE FORWARD AND REVERSE CONDUCTION MODES IN MINIMIZED.