Control circuit for a semiconductor element with a control electrode
    1.
    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
    2.
    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。

    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。

    Power conversion apparatus
    5.
    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
    6.
    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。

    Method and apparatus for controlling the operation of synchronous motor
    7.
    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。

    Motor having cores structure wherein magnetic circuit is designed in three dimensional configuration
    8.
    发明申请
    Motor having cores structure wherein magnetic circuit is designed in three dimensional configuration 审中-公开
    具有磁芯结构的电动机,其中磁路设计成三维结构

    公开(公告)号:US20060113849A1

    公开(公告)日:2006-06-01

    申请号:US11326457

    申请日:2006-01-06

    IPC分类号: H02K41/00 H02K15/12 H02K21/12

    摘要: In order to provide a motor characterized by a high level of efficiency equal to or better than that of using the silicon steel plate, achieved by easy production method and reduced core loss, which result from reduction in the manpower for production by using the sintered metal or powdered iron core in at least one of the stator and rotor, the present invention provides a motor comprising a stator and a rotor wherein either one of said stator or rotor has a magnet, and the other has a magnetic substance. This motor is further characterized in that the main magnetic flux flowing between the stator and rotor changes in the three-dimensional directions according to the magnetic structure of this motor, and at least part of said magnetic substance is composed of an aggregate of magnetic powder.

    摘要翻译: 为了提供一种以与使用硅钢板相同或更好的高效率的电动机来实现的,其通过易于制造的方法实现,并且由于通过使用烧结金属的生产人力的减少而导致的铁损减少 或定子和转子中的至少一个中的铁芯,本发明提供一种电动机,其包括定子和转子,其中所述定子或转子中的任一个具有磁体,而另一个具有磁性物质。 该电动机的特征还在于,根据该电动机的磁性结构,在定子和转子之间流动的主磁通量在三维方向上发生变化,并且至少一部分磁性物质由磁粉的集合体构成。

    Optical glass fiber
    9.
    发明授权
    Optical glass fiber 失效
    光学玻璃纤维

    公开(公告)号:US6004675A

    公开(公告)日:1999-12-21

    申请号:US937953

    申请日:1992-09-01

    摘要: A coated glass fiber for light transmission consisting of a glass fiber for light transmission and at least one coating layer made of a UV-curing resin, wherein an outermost layer of the coating layer is made of a UV-curing resin having a Young's modulus of at least 100 kg/mm.sup.2 and a change of a cure shrinkage degree of 1% or less after a Young's modulus reaches one tenth of an end Young's modulus, which has good lateral pressure characteristics and low transmission loss.

    摘要翻译: 一种用于透光的涂覆玻璃纤维,由用于透光的玻璃纤维和由UV固化树脂制成的至少一个涂层组成,其中涂层的最外层由具有杨氏模量的UV固化树脂制成 至少100kg / mm2,并且杨氏模量达到杨氏模量的十分之一后具有1%以下的固化收缩率,具有良好的横向压力特性和低的传输损失。

    Plastic optical fiber preform having a jacket layer
    10.
    发明授权
    Plastic optical fiber preform having a jacket layer 失效
    具有护套层的塑料光纤预制件

    公开(公告)号:US5891570A

    公开(公告)日:1999-04-06

    申请号:US837103

    申请日:1997-04-14

    摘要: A process and an apparatus for producing a preform for plastic optical fiber having a refractive index distribution in which the refractive index is gradually decreased from the center of the preform toward the outer periphery thereof, by depositing a deposition layer comprising a polymer A (refractive index: N.sub.a) and a refractive index modifier having a refractive index different from that of the polymer A onto a surface of a rod member rotating about an axis thereof, by use of vapor-phase deposition based on a CVD (Chemical Vapor Deposition) process, or a coating process. A plastic optical fiber preform including deposition layers having a gradually decreasing refractive index distribution is formed by changing the mixing ratio between the polymer A and the refractive index modifier constituting the deposition layer.

    摘要翻译: 一种用于制造塑料光纤预制棒的方法和装置,其具有折射率分布,折射率从预制棒的中心朝向其外周逐渐减小,通过沉积包含聚合物A的沉积层(折射率 :Na)和折射率调节剂,其折射率与聚合物A的折射率不同,通过使用基于CVD(化学气相沉积)方法的气相沉积,在围绕其轴线旋转的杆构件的表面上, 或涂层工艺。 通过改变聚合物A和构成沉积层的折射率调节剂之间的混合比,形成包括具有逐渐降低的折射率分布的沉积层的塑料光纤预制件。