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    • 1. 发明授权
    • Control system for adjusting a-c motor speed at line frequency or a subharmonic of the line frequency
    • 用于调整线路频率a-c电机速度或线路频率分调的控制系统
    • US3908158A
    • 1975-09-23
    • US50663974
    • 1974-09-16
    • BORG WARNER
    • STUDTMANN GEORGE H
    • H02P25/14H02P5/40
    • H02P25/14
    • Speed control of an a-c motor is accomplished with back-to-back thyristors coupled between the power line and the motor. A gate circuit (1) selects which of the thyristors can be gated on, and (2) determines the actual time of thyristor conduction in each half-cycle. In turn the gate circuit is regulated, as to thyristor selection, by a countdown arrangement including frequency control and multivibrator circuits. The gate circuit is also regulated, to determine the actual conduction time, by a voltage control circuit coupled to the frequency control circuit. Thus the frequency control circuit regulates motor speed as a function either of the fundamental power line frequency, or a subharmonic of the line frequency.
    • a-c电机的速度控制通过耦合在电力线和电动机之间的背靠背晶闸管来实现。 门电路(1)选择哪个晶闸管可以选通,以及(2)确定每个半周期中晶闸管导通的实际时间。 通过包括频率控制和多谐振荡器电路在内的倒数排列,栅极电路又被调节,关于晶闸管选择。 门电路也通过与频率控制电路耦合的电压控制电路进行调节,以确定实际的导通时间。 因此,频率控制电路将电动机速度调节为基本电力线频率的函数或线路频率的次谐波。
    • 3. 发明授权
    • MULTI-PHASE INVERTER USING ISOLATED DIRECT CURRENT SUPPLIED FOR FIRING THE SCRs
    • 使用分离直流电源的多相逆变器用于启动SCR
    • US3656047A
    • 1972-04-11
    • US3656047D
    • 1971-02-04
    • BORG WARNER
    • YAREMA RAYMOND JSTUDTMANN GEORGE H
    • H02M3/315H02M7/515H02M7/52
    • H02M7/5155H02M3/315
    • An impulse commutated, variable output frequency, multiphase inverter type of power switching system employing main SCRs to handle the primary output currents and auxiliary SCRs to aid in commutating the main SCRs is disclosed wherein the firing of the SCRs is done by using isolated direct current supplies. Each SCR is fired by a separate driving circuit which includes individual isolated direct current supply and a switch unit to connect that supply directly to the gate-cathode circuit of the associated SCR. The control circuitry includes an oscillator whose output frequency is selectively variable, and a three-phase square-wave generator driven by the oscillator which produce two squarewaves, one the inverse of the other, for each phase. Each of these six outputs of the generator drives a pulse and a delay pulse circuit which respectively produce a first pulse and a delayed second pulse in response to each change of polarity of the particular square-wave input. These pulse and delay pulse are inductively coupled to different ones of the multivibrator circuits to turn on the switch unit and to ''''fire'''' an SCR in accordance with a predetermined sequence so as to generate a three-phase a.c. output from the inverter. This arrangement allows for short rise times and fast turn-off of the SCR gate drive and also allows the output frequency to be varied over a large range from d.c. to large values.
    • 公开了一种脉冲换向,可变输出频率,多相逆变器类型的电力开关系统,其使用主要SCR来处理初级输出电流和辅助SCR以帮助整流主SCR,其中SCR的触发通过使用隔离的直流电源 。 每个SCR由单独的驱动电路触发,该驱动电路包括单独的隔离直流电源和将该电源直接连接到相关SCR的栅极 - 阴极电路的开关单元。 控制电路包括一个输出频率可选择性变化的振荡器,以及由振荡器驱动的三相方波发生器,其产生两个方波,一个是相对于每个相位的反向。 发生器的这六个输出中的每一个驱动脉冲和延迟脉冲电路,其响应于特定方波输入的极性的每个改变分别产生第一脉冲和延迟的第二脉冲。 这些脉冲和延迟脉冲电感耦合到多谐振荡器电路中的不同的电路,以接通开关单元并根据预定的顺序“触发”SCR,以便产生三相交流电。 从变频器输出。 这种布置允许SCR上升时间短并快速关断SCR栅极驱动,并且还允许输出频率在直流范围内变化很大。 到大价值。
    • 10. 发明授权
    • Static transfer switching system
    • 静态转换开关系统
    • US3634701A
    • 1972-01-11
    • US3634701D
    • 1969-10-16
    • BORG WARNER
    • STUDTMANN GEORGE H
    • H02H3/36H02J9/06H03K17/72H03K17/725H03K5/00
    • H02J9/06H02H3/36H03K17/72H03K17/725Y10T307/615
    • A static transfer system includes a first switch for connecting a normally used AC source to a lead and a second switch for connecting a standby source to the lead. A sensor is connected to an AC sine wave reference source for comparing at every instant of time the normal AC sine wave signal to the reference source signal and feeding an error signal to a logic circuit at any instant in time when the normal source signal falls below the reference signal. The logic circuit is effective to instantaneously connect the load to the standby source and disconnect the load from the normal source irrespective of the load power factor, and to reconnect the load to the normal source and disconnect the standby source from the load when the normal source is again capable of handling the load.
    • 静态传输系统包括用于将正常使用的AC源连接到引线的第一开关和用于将备用源连接到引线的第二开关。 传感器连接到交流正弦波参考源,用于在每一时刻将正常交流正弦波信号与参考源信号进行比较,并在正常信号源下降的任何时刻将误差信号馈送到逻辑电路 参考信号。 逻辑电路有效地将负载瞬时连接到备用电源,并将负载从正常电源断开,而不管负载功率因数如何,并将负载重新连接到正常电源,并将正常来源的负载源与负载断开 再次能够处理负载。