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    Frequency polyphase power supply
    4.
    发明授权
    Frequency polyphase power supply 失效
    频率多相电源

    公开(公告)号：US3641566A

    公开(公告)日：1972-02-08

    申请号：US3641566D

    申请日：1969-09-29

    Applicant: GEN ELECTRIC

    Inventor： KONRAD CHARLES E ,  CHAUSSE BURNETTE P

    IPC: H03B27/00 ,  G06G7/22 ,  H02M7/48 ,  H02M7/49 ,  H03M1/00 ,  H03B19/00

    CPC classification number: H03M1/00 ,  H02M7/49 ,  H03M1/1066

    Abstract: An apparatus for providing a polyphase alternating current including a pulse generator and a digital counter for converting the pulses into a predetermined number of distinct consecutive signals which are cyclically applied to a decoding circuit for each phase, each having one output line per signal. A digital to analog converter connected to each decoding circuit designates a voltage level to each consecutive signal which is proportional to the sine of the phase angle during which the signal occurs.

    Abstract translation: 一种用于提供包括脉冲发生器和数字计数器的多相交流电的装置，用于将脉冲转换成预定数量的不同的连续信号，循环地施加到每个相位的解码电路，每个信号每个信号具有一个输出线。 连接到每个解码电路的数模转换器指定与信号发生的相位角的正弦成正比的每个连续信号的电压电平。

    Induction motor speed control
    7.
    发明授权
    Induction motor speed control 失效
    感应电机速度控制

    公开(公告)号：US3671831A

    公开(公告)日：1972-06-20

    申请号：US3671831D

    申请日：1971-03-05

    Applicant: GEN ELECTRIC

    Inventor： CHAUSSE BURNETTE P ,  KONRAD CHARLES E

    IPC: H02P23/08 ,  H02P27/04 ,  H02P27/16 ,  H02P5/40

    CPC classification number: H02P23/08 ,  H02P27/045 ,  H02P27/047 ,  H02P27/048 ,  H02P27/16 ,  H02P2207/01

    Abstract: A control circuit for regulating the speed of a polyphase induction motor by changing the frequency and voltage level of the supply source supplying power to the motor. The difference between a speed reference signal and an output signal from a closed loop feedback circuit is converted to a sine wave alternating current signal having a frequency which varies with the time integral of the difference. A circuit for amplifying this alternating current signal provides power to the induction motor. A pair of diodes connected in the feedback circuit limits the rate of change of the frequency of the alternating current signal to a value determined by the design of the motor. The voltage amplitude of the alternating current supplied to the motor is adjusted as a function of the frequency and is further adjusted as a function of slip of the motor. Additional adjustment of the volts/cycle/second value of the alternating current supplied to the motor allows for overexcitation of the motor even beyond the design limits of the motor in order to provide the greatest possible torque to maximize the rate of change in speed and direction of the motor.

    Abstract translation: 一种控制电路，用于通过将电源的供电电源的频率和电压电平改变到电动机来调节多相感应电机的速度。 将速度参考信号和来自闭环反馈电路的输出信号之间的差异转换为具有随差值的时间积分而变化的频率的正弦波交流信号。 用于放大该交流信号的电路为感应电机提供电力。 连接在反馈电路中的一对二极管将交流信号的频率的变化率限制为由电动机的设计确定的值。 供给电动机的交流电压的电压幅度作为频率的函数进行调整，并作为电动机滑动的函数进一步调节。 额外调整提供给电机的交流电压的伏特/周期/秒值允许马达的过励磁甚至超出电机的设计极限，以提供最大的转矩来最大化速度和方向的变化率 的电机。

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