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    • 3. 发明授权
    • Motor starting circuit
    • 电机启动电路
    • US4468604A
    • 1984-08-28
    • US354539
    • 1982-03-04
    • Andrew Zaderej
    • Andrew Zaderej
    • H02P1/44H02P1/42
    • H02P1/44
    • A motor starting circuit in which a triac connected in series with the starting winding of the motor is gated into conduction for only a preselected time period following motor start-up. A switching circuit, in parallel with the serially connected triac and starting winding, includes a first SCR which provides a low resistance signal path to the gate of the triac at such time that the first SCR is in a conducting state. The first SCR is gated by a resistance network and the time period is established by an RC circuit which gates a second SCR, at the end of the selected time period, to short out the portion of the resistance network to which the gate of the first SCR is connected so as to turn off the first SCR and leave a high resistance path through the switching circuit to the gate of the triac.
    • 电动机启动电路,其中与电动机的起动绕组串联连接的三端双向可控硅开关仅在电动机起动之后才被选通。 与串行连接的三端双向可控硅开关元件和起动绕组并联的开关电路包括第一SCR,其在第一SCR处于导通状态的时间内提供到三端双向可控硅开关的栅极的低电阻信号路径。 第一SCR由电阻网络选通,并且时间周期由在所选择的时间段结束时对第二SCR进行栅极的RC电路建立,以将第一SCR的栅极的部分短路 SCR连接以便关闭第一SCR并且通过开关电路留下高电阻通路到三端双向可控硅开关元件的栅极。
    • 4. 发明授权
    • Power control circuit
    • 电源控制电路
    • US4626746A
    • 1986-12-02
    • US747168
    • 1985-06-20
    • Andrew Zaderej
    • Andrew Zaderej
    • H05B41/392H05B37/00
    • H05B41/392Y10S315/04
    • A power control circuit which receives an AC line signal input and includes operational amplifiers which receive the AC line signal after it has been rectified. Each operational amplifier respectively operates as a zero crossing circuit which produces a square synchronous pulsed signal, a ramp generator which receives the square synchronous pulsed signal and produces a sawtooth wave signal, a comparator which receives the sawtooth wave signal and produces a synchronous pulsed width modulated output signal which can be varied. A power bridge circuit receives the AC line signal input and is triggered by the pulsed width modulated signal to rectify the AC line input to pass a pulsed width modulated signal to the load. The signal passed to the load is varied by the setting of the comparator.
    • 一种功率控制电路,其接收AC线路信号输入,并且包括在其被整流之后接收AC线路信号的运算放大器。 每个运算放大器分别作为产生平方同步脉冲信号的过零电路工作,斜坡发生器接收平方同步脉冲信号并产生锯齿波信号,比较器接收锯齿波信号并产生同步脉冲宽度调制 输出信号可以变化。 电力电路电路接收交流线路信号输入,并由脉冲宽度调制信号触发,以整流交流线路输入,将脉冲宽度调制信号传递给负载。 传递给负载的信号通过比较器的设置而改变。
    • 6. 发明授权
    • Motor starting circuit
    • 电机启动电路
    • US4761601A
    • 1988-08-02
    • US640866
    • 1984-08-15
    • Andrew Zaderej
    • Andrew Zaderej
    • H02P1/44H02P1/42
    • H02P1/44
    • A motor starting circuit in which a triac connected in series with the starting winding of the motor is gated into conduction for only a preselected time period following motor start-up. A switching circuit, in parallel with the serially connected triac and starting winding, includes an SCR which provides a low resistance signal path to the gate of the triac at such time that the SCR is in a conducting state. The SCR is gated by a resistance network and the time period is established by an RC circuit which gates a switch at the end of the selected time period to short out the portion of the resistance net work to which the gate of the SCR is connected so as to turn off the SCR and leave a high resistance path through the switching circuit to the gate of the triac.
    • 电动机启动电路,其中与电动机的起动绕组串联连接的三端双向可控硅开关仅在电动机起动之后才被选通。 与串联连接的三端双向可控硅开关元件和起动绕组并联的开关电路包括SCR,其在SCR处于导通状态的时间内提供到三端双向可控硅开关的栅极的低电阻信号路径。 SCR由电阻网络选通,并且时间周期由RC电路建立,该RC电路在选定的时间段结束时对开关进行栅极,以将SCR的栅极连接到的电阻网络的部分短路 关闭SCR并且通过开关电路留下高电阻路径到三端双向可控硅开关元件的栅极。