Method and apparatus for controlling the operation of synchronous motor
    2.
    发明授权
    Method and apparatus for controlling the operation of synchronous motor 失效
    控制同步电机运行的方法和装置

    公开(公告)号:US4012679A

    公开(公告)日:1977-03-15

    申请号:US543306

    申请日:1975-01-23

    IPC分类号: H02P1/52 H02P25/02 H02P1/46

    CPC分类号: H02P1/52 H02P25/024

    摘要: A method and an apparatus for controlling the operation of the synchronous motor are disclosed in which the synchronous motor is started with a starting power supply and operated with a steadying power supply. The starting power supply is adapted to alternately repeat acceleration and deceleration of the synchronous motor in the neighborhood of the frequency thereby to bring the synchronous motor into the point where the synchronous motor is in synchronism with the steadying power supply. The starting power supply comprises a current control circuit and a phase angle control circuit, which circuits control the motor current in such a manner as to prevent the voltage drop due to the synchronous reactance of the motor from exceeding the induced voltage of the motor, while at the same time controlling the power factor angle to be in the range from a lead 90.degree. to the angle corresponding to a maximum output point produced by said motor current.

    摘要翻译: 公开了一种用于控制同步电动机的操作的方法和装置,其中同步电动机由启动电源启动并以稳定电源运行。 起动电源适于在频率附近交替地重复同步电动机的加速和减速,从而使同步电动机进入同步电动机与稳定电源同步的点。 启动电源包括电流控制电路和相位角控制电路,其电路控制电动机电流,以防止由于电动机的同步电抗引起的电压下降超过电动机的感应电压,同时 同时将功率因数角控制在从导线90°到对应于由所述电动机电流产生的最大输出点的角度的范围内。

    Method and apparatus for detecting shortcircuit in arm of GTO inverter
    3.
    发明授权
    Method and apparatus for detecting shortcircuit in arm of GTO inverter 失效
    GTO逆变器臂的短路检测方法及装置

    公开(公告)号:US4384248A

    公开(公告)日:1983-05-17

    申请号:US160174

    申请日:1980-06-17

    IPC分类号: G01R31/02 H02H7/122 H02H3/28

    CPC分类号: G01R31/025 H02H7/1225

    摘要: Shortcircuit in an arm including a series connection of GTO's and reactors of an inverter is detected by sensing a voltage across the reactor. In one method, the shortcircuit in the arm is detected when voltages are coincidently applied to a P-line arm reactor and an N-line arm reactor for a predetermined time period. In another method, it is detected when an integrated value of a voltage across at least one of the reactors exceeds a predetermined level.

    摘要翻译: 通过感测反应堆两端的电压来检测包括GTO和逆变器的反应器的串联连接的臂中的短路。 在一种方法中,当预定时间段内的电压一致地施加到P线臂式电抗器和N型臂式电抗器时,检测到臂中的短路。 在另一种方法中,当跨过至少一个电抗器的电压的积分值超过预定电平时检测。

    Variable speed control apparatus for induction motor
    5.
    发明授权
    Variable speed control apparatus for induction motor 失效
    感应电动机变速控制装置

    公开(公告)号:US4099108A

    公开(公告)日:1978-07-04

    申请号:US716205

    申请日:1976-08-20

    IPC分类号: H02P27/06 H02P5/40

    摘要: An induction motor is operated by a power supply of variable voltage and variable frequency. The voltage and frequency of the variable-voltage variable-frequency power supply is changed by a control circuit to accelerate or decelerate the induction motor. For slowly controlling the speed of the induction motor, the ratio of the output voltage to the output frequency of the variable-voltage variable-frequency power supply is maintained substantially constant. The control circuit includes a voltage correcting means which, in response to a command for sudden acceleration or deceleration of the speed of the motor, corrects the output voltage of the power supply in accordance with the acceleration or deceleration rate and the prevailing magnitude of the output frequency of the variable-voltage variable-frequency power supply.

    摘要翻译: 感应电动机由可变电压和可变频率的电源操作。 可变电压可变频率电源的电压和频率由控制电路改变,以加速或减速感应电动机。 为了缓慢地控制感应电动机的速度,可变电压可变频率电源的输出电压与输出频率的比例保持基本恒定。 控制电路包括电压校正装置,响应于马达速度的突然加速或减速的命令,根据加速或减速率和输出的主要幅度来校正电源的输出电压 可变电压可变频率电源的频率。

    Current source inverter
    6.
    发明授权
    Current source inverter 失效
    电流源逆变器

    公开(公告)号:US4156899A

    公开(公告)日:1979-05-29

    申请号:US800533

    申请日:1977-05-25

    CPC分类号: H02M7/5152

    摘要: A current source inverter circuit having a plurality of branches, each branch consisting of a pair of thyristors adapted to be switched on alternatingly for power supply from a D. C. power source and diodes connected in series to the thyristors. To each connection point between a thyristor and a diode, there is connected one end of one of a plurality of commutating capacitors, while the other ends of the capacitors are connected in common. An auxiliary charging source is provided between the common connection of the commutating capacitors and one of the terminals of the D. C. source for performing an auxiliary charging for each commutating capacitor through a respective thyristor. Between one of the terminals of the D. C. power source and the common connection of the commutating capacitors, a series circuit consisting of a diode and an auxiliary D. C. source is provided constituting a by-pass for the charging voltage of the commutating capacitor when the associated thyristor is in the ON state.

    摘要翻译: 具有多个分支的电流源逆变器电路,每个分支由一对晶闸管组成,适于交替地接通来自D.C。电源的电源和与晶闸管串联连接的二极管。 对于晶闸管和二极管之间的每个连接点,连接多个换向电容器中的一个的一端,而电容器的另一端共同连接。 在整流电容器的公共连接和D.C源的一个端子之间提供辅助充电源,用于通过相应的晶闸管对每个换向电容器进行辅助充电。 在直流电源的一个端子和换向电容器的公共连接之间,构成由二极管和辅助直流电源组成的串联电路,构成绕组电容器的充电电压的旁路,当相关的晶闸管 处于ON状态。

    Control circuit for a semiconductor element with a control electrode
    7.
    发明授权
    Control circuit for a semiconductor element with a control electrode 失效
    具有控制电极的半导体元件的控制电路

    公开(公告)号:US4568838A

    公开(公告)日:1986-02-04

    申请号:US750229

    申请日:1985-06-28

    CPC分类号: H03K17/16

    摘要: A control circuit for a semiconductor element with a control electrode includes a signal transmission circuit, in which two switching elements made conductive when a control signal is supplied from a control signal source to the switching elements through a signal insulating element, are provided so that the control signal is transferred to a turn-on circuit for the semiconductor element only when the switching elements are simultaneously made conductive.

    摘要翻译: 用于具有控制电极的半导体元件的控制电路包括信号传输电路,其中当控制信号通过信号绝缘元件从控制信号源提供给开关元件时,两个开关元件导通,这样, 只有当开关元件同时导通时,才将控制信号传送到半导体元件的导通电路。

    Gate circuit for gate turn-off thyristor
    8.
    发明授权
    Gate circuit for gate turn-off thyristor 失效
    栅极电路用于栅极截止晶闸管

    公开(公告)号:US4456836A

    公开(公告)日:1984-06-26

    申请号:US335547

    申请日:1981-12-29

    IPC分类号: H03K17/732 H03K17/72

    CPC分类号: H03K17/732

    摘要: A gate circuit for gate turn-off thyristors is disclosed which includes a turn-on circuit formed of a series combination of a turn-on power source and an NPN transistor and a turn-off circuit formed of a series combination of a turn-off power source and a thyristor, and in which a PNP transistor is provided between the anode and gate of the thyristor in such a manner that the base of the NPN transistor and the base of the PNP transistor are connected to each other and a junction of these bases receives a control signal for turning on or off a gate turn-off thyristor.

    摘要翻译: 公开了一种用于栅极截止晶闸管的栅极电路,其包括由导通电源和NPN晶体管的串联组合形成的导通电路,以及由关断的串联组合形成的截止电路 电源和晶闸管,并且其中PNP晶体管以这样的方式设置在晶闸管的阳极和栅极之间,使得NPN晶体管的基极和PNP晶体管的基极彼此连接,并且这些 基极接收用于接通或关闭栅极截止晶闸管的控制信号。

    Power conversion apparatus
    9.
    发明授权
    Power conversion apparatus 失效
    电力转换装置

    公开(公告)号:US4231083A

    公开(公告)日:1980-10-28

    申请号:US931008

    申请日:1978-08-04

    摘要: When a power conversion apparatus such as inverter or chopper comprises gate turn-off thyristors (GTO's), current limiting reactors are connected to cathodes of the GTO's and opposite ends of each of the reactors are connected to positive and negative terminals, respectively, of a gate power supply which supplies a turn-on current and a turn-off current to the respective GTO. With this arrangement, an energy stored in each of the reactors at the turn-off of the GTO is absorbed by the gate power supply.

    摘要翻译: 当诸如逆变器或斩波器的功率转换装置包括栅极截止晶闸管(GTO)时,限流电抗器连接到GTO的阴极,并且每个反应器的相对端分别连接到正极和负极端子 栅极电源,其向相应的GTO提供导通电流和关断电流。 通过这种布置,在GTO关断时存储在每个电抗器中的能量被栅极电源吸收。

    Control device for a pulse-width modulated inverter
    10.
    发明授权
    Control device for a pulse-width modulated inverter 失效
    用于脉宽调制逆变器的控制装置

    公开(公告)号:US4179727A

    公开(公告)日:1979-12-18

    申请号:US852980

    申请日:1977-11-18

    IPC分类号: H02M7/48 H02M7/527 H02M7/515

    CPC分类号: H02M7/527

    摘要: A control device for a pulse-width modulated inverter comprises means for generating as a carrier wave a triangular wave synchronizing with an AC output from the inverter, means for generating as a modulating wave a train of rectangular wave pulses which synchronize with the triangular wave and have a width corresponding to a section effective for a modulating operation and a predetermined amplitude, voltage level setting means for setting the amplitude of the train of rectangular wave pulses, and means for modulating the triangular wave with the train of rectangular wave pulses and generating a control pulse for the AC output. The rectangular wave pulses are so set as to have a modulating level of zero in the proximity of a point corresponding to the zero point of the AC output of each phase thereby to remove a frequency divider for adjusting input frequencies of the triangular wave generating means and the modulating wave generating means and to prevent a useless modulating operation leading only to an increase in the number of commutations of the inverter.

    摘要翻译: 用于脉冲宽度调制的反相器的控制装置包括用于产生与来自反相器的AC输出同步的三角波作为载波的装置,用于产生与三角波同步的一串矩形波脉冲作为调制波; 具有对应于对于调制操作有效的部分的宽度和用于设定矩形波脉冲列的振幅的预定幅度的电压电平设定装置,以及用矩阵波脉冲串调制三角波的装置, AC输出的控制脉冲。 矩形波脉冲被设置为在与每相的AC输出的零点相对应的点附近具有零调制电平,从而去除用于调整三角波产生装置的输入频率的分频器, 调制波产生装置并且防止无用的调制操作仅导致逆变器的换向数量的增加。