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66 条记录 (耗时 0.012 秒)

    TRIAC CONTROL CIRCUIT
    26.
    发明公开
    TRIAC CONTROL CIRCUIT 失效
    TRIAC控制电路

    公开(公告)号：EP0885415A4

    公开(公告)日：2000-01-26

    申请号：EP96905175

    申请日：1996-01-19

    申请人： SUNPOWER INC

    发明人： REDLICH ROBERT W

    IPC分类号： G05F1/455 ,  G05F5/00 ,  H03K17/13 ,  H03K17/725 ,  H03K17/72

    CPC分类号： G05F5/00 ,  H03K17/136

    摘要： A common and inexpensive integrated 555 timing circuit is used to vary the timing of triac firing pulses in response to a control voltage. A trigger pulse generator (3) generates a pulse at each zero crossover of an AC line (2). This pulse initiates a variable, one shot pulse generator (5) which generates a rectangular pulse. The rectangular pulse terminates following a time interval which is controlled by the magnitude of a control input signal. A pulse forming circuit (8) generates a triac firing pulse at the termination of the rectangular pulse from the one shot pulse generator (5).

    Improvements in gate pulse generator for static var compensator
    27.
    发明公开
    Improvements in gate pulse generator for static var compensator 失效
    。。。。。。。。。。。。。。。。

    公开(公告)号：EP0392458A2

    公开(公告)日：1990-10-17

    申请号：EP90106844.5

    申请日：1990-04-10

    申请人： KABUSHIKI KAISHA TOSHIBA

    发明人： Sato, Naoko, c/o Intellectual Property Div.

    IPC分类号： H03K17/16 ,  H03K3/352 ,  H03K3/013 ,  H03K17/66 ,  H03K17/30 ,  H03K17/72

    CPC分类号： H03K17/08124 ,  G05F1/45 ,  H02J3/1864 ,  H02M1/088 ,  H03K5/151 ,  Y02E40/12

    摘要： A gate pulse generator for a static var compensator (SVC) constituted by a thyristor switched capacitor (TSC) comprises voltage detectors (5u, 5x) for respec­tively detecting forward and reverse voltages (Vu, Vx) applied to antiparallel-connected thyristors (3U, 3X) in the TSC. The antiparallel-connected thyristors (3U, 3X) comprise a plurality of series-connected forward thyris­tors (3U) and a plurality of series-connected reverse thyristors (3X). The gate pulse generator monitors the forward and reverse voltages (Vu, Vx) and determines whether a period (2 ms) in which both the forward and reverse voltages (Vu, Vx) are zero continues for a pre­determined period (2 ms) while reverse-phase sides (3X) of the antiparallel-connected thyristors (3U, 3X) are held in conduction periods (t30 - t40), respectively. The gate pulse generator prolongs an active period (t20 - t31) of a forward conduction period signal (PHSu) by the predetermined period (2 ms). Upon switching (t30) from in-phase conduction to revese-phase conduction, even if some of the plurality of series-connected thyri­stors (3U) are turned off, these thyristors are turned on again within the predetermined period (3U), and an overvoltage is not applied to these thyristors.

    摘要翻译： 用于由晶闸管开关电容器（TSC）构成的静态无功补偿器（SVC）的门脉冲发生器包括用于分别检测施加到反并联连接晶闸管（3U，5U）的正向和反向电压（Vu，Vx）的电压检测器（5u，5x） 3X）。 反并联连接的晶闸管（3U，3X）包括多个串联连接的正向晶闸管（3U）和多个串联的反向晶闸管（3X）。 门脉冲发生器监视正向和反向电压（Vu，Vx），并确定正向和反向电压（Vu，Vx）均为零的周期（2ms）是否在相反的情况下持续预定的周期（2ms） 反并联连接的晶闸管（3U，3X）的相位侧（3X）分别保持在导通时段（t30-t40）。 门脉冲发生器将正向导通周期信号（PHSu）的有效期（t20-t31）延长预定期间（2ms）。 在将（t30）从同相导通切换到反相导通时，即使多个串联连接的晶闸管（3U）中的一些断开，这些晶闸管在预定周期（3U）内再次导通，并且 过电压不会施加到这些晶闸管。

    CONTROL CIRCUITRY USING TWO BRANCH CIRCUITS FOR HIGH-VOLTAGE SOLID-STATE SWITCHES.
    29.
    发明公开
    CONTROL CIRCUITRY USING TWO BRANCH CIRCUITS FOR HIGH-VOLTAGE SOLID-STATE SWITCHES. 失效
    控制电路两个分支电路，用于高压开关SHALBLEITER。

    公开(公告)号：EP0053113A4

    公开(公告)日：1982-04-29

    申请号：EP81900321

    申请日：1980-12-22

    申请人： WESTERN ELECTRIC CO

    发明人： DAVIS JAMES ALVIN ,  MACPHERSON WILLIAM FREDERICK ,  MUSSMAN HARRY EDWARD ,  SHACKLE PETER WILLIAM

    IPC分类号： H01L29/74 ,  H03K17/567 ,  H03K17/60 ,  H03K17/72 ,  H03K17/74 ,  H03K17/785 ,  H03K3/01 ,  H03K3/26 ,  H03K3/42 ,  H03L5/00

    CPC分类号： H03K17/785 ,  H03K17/567 ,  H03K17/74

    摘要： To switch a first gated diode switch (GDSL1) to the "OFF" state requires a voltage applied to the gate which is more positive than that of the anode or cathode and a sourcing of current into the gate of substantially the same order of magnitude as flows between the anode and cathode of the first switch. Control circuitry, which uses a second gated diode switch (GDSC) coupled by the cathode to the gate of the first switch (GDSL1), is used to control the state of the first switch (GDSL1). The control circuitry also comprises a first branch circuit coupled to the anode of the GDSC and to a first potential source V1 and a second branch circuit coupled to the anode of GDSC and to a second potential source V2 which is of a lower potential than V1. The second branch circuit has a high voltage and high current capability switch in series between V2 and the anode of GDSC. The first branch circuit has a high voltage but modest current handling switch in series between V1 and the anode of GDSC. The second branch circuit is used to provide a surge of current if and when needed during the current break operation to turn GDSL1 to an OFF state and the first branch circuit is used to maintain the state of the load switch. The second branch circuit can be shared by many control circuits.

    A gate circuit for a thyristor and a thyristor having such a gate circuit
    30.
    发明公开
    A gate circuit for a thyristor and a thyristor having such a gate circuit 失效
    一种用于栅极驱动器电路，用于晶闸管和具有这种电路的晶闸管。

    公开(公告)号：EP0035379A1

    公开(公告)日：1981-09-09

    申请号：EP81300812.5

    申请日：1981-02-26

    申请人： Hitachi, Ltd.

    发明人： Fukui, Hiroshi ,  Kimura, Shin ,  Onda, Kenichi ,  Amano, Hisao

    IPC分类号： H02M1/08 ,  H03K17/72

    CPC分类号： H03K17/73 ,  H02M1/08

    摘要： A gate circuit for a thyristor (1) is provided which supplies gate-on current to the gate of the thyristor (1) when anode-cathode voltage of the thyristor (1) exceeds a predetermined level (Vref) and turns off the gate-on current when the anode-cathode voltage falls below the predetermined level (Vref), so that conduction time of the gate-on current is made as small as necessary. Such a gate circuit for a thyristor (1) comprises a comparator (2) having one input connected to the thyristor anode (A) and another to a predetermined voltage level source the output of the comparator (2) being connected to an AND circuit (3) another input of which is provided by a gate ignition signal generator circuit (5) and the output of which supplies the thyristor gate signal via a pulse amplifier circuit (4).