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18 条记录 (耗时 0.012 秒)

    Semiconductor switching device
    1.
    发明公开
    Semiconductor switching device 失效
    半导体开关器件

    公开(公告)号：EP0140349A3

    公开(公告)日：1987-09-30

    申请号：EP84112922

    申请日：1984-10-26

    申请人： HITACHI, LTD.

    发明人： Tokunaga, Norikazu ,  Fukui, Hiroshi ,  Watanabe, Kouzou ,  Amano, Hisao ,  Sato, Masayoshi

    IPC分类号： H03K17/10 ,  H02M01/06 ,  H02M01/088

    CPC分类号： H03K17/102

    摘要： A semiconductor switching device (S) includes a row of a plurality of switching elements (S 1 -S n ) connected in series. The input terminal of the input-nearest switching element (S n ) and the output terminal of the output-nearest switching element (S 1 ) among the row are connected with the input terminal (TRI) and output terminal (TRO) of the semiconductor switching device (S), respectively. An control signal is applied to the control terminal (TRC) of the output-nearest switching element (S 1 ). The semiconductor switching device comprises a first plurality of capacitive elements (C 1 -C n-1 ) each of which is connected between the ouput terminal of the output-nearer switching element and the control terminal of the input-nearer (S 1 -S n-1 ) switching element (S 2 -S n ) of the adjacent switching elements among the switching element row; and a second capacitive element (C n ) connected between the output terminal and input terminal of the input-nearest switching element (S n ). At least the switching elements (S 2 -S n ) have insulating gates, respectively.

    Power supply control system
    3.
    发明公开
    Power supply control system 失效
    电源控制系统

    公开(公告)号：EP0409226A3

    公开(公告)日：1993-01-13

    申请号：EP90113850.3

    申请日：1990-07-19

    申请人： HITACHI, LTD.

    发明人： Miyazaki, Hideki ,  Yamato, Ikuo ,  Onda, Kenichi ,  Matsuda, Yasuo ,  Morita, Yuzo ,  Shirahama, Hidefumi ,  Tokunaga, Norikazu ,  Suzuki, Yutaka

    IPC分类号： H02J3/00 ,  H02J4/00 ,  H01R13/642 ,  H01R29/00 ,  H02M1/10 ,  H02G3/00

    CPC分类号： H02M1/10 ,  H01R13/642 ,  H01R13/6675 ,  H01R29/00 ,  H02J3/00 ,  H02J4/00

    摘要： A power supply control system including a variable power converter (5, 52) for converting electric power from a power supply (1) to a load (16, 55) into that of a specification demanded by the load in response to a power specification information source (15a, SP) provided on the load side. With a change in the load, the infor­mation source (35) also changed, thereby providing a flexible power supply control system capable of meeting different loads. For applications to a high power supply, the system comprises a plurality of variable power converters (5a to 5d) adapted to operate selectively in accordance with requisite power information sources provided in or on the side of a plurality of loads (16), thereby providing a system realizing a flexible power supply. For application to a low power supply, the system comprises a plug (54) having a power specification information source (85) and a socket (51) having a variable power converter (52).

    Switching power supply
    6.
    发明公开
    Switching power supply 失效
    开关电源

    公开(公告)号：EP0239072A3

    公开(公告)日：1988-11-17

    申请号：EP87104305

    申请日：1987-03-24

    申请人： HITACHI, LTD. ,  Hitachi Nisshin Electronics Co., Ltd ,  Hitachi Device Engineering Co., Ltd.

    发明人： Yamato, Ikuo ,  Tokunaga, Norikazu ,  Amano, Hisao ,  Noguchi, Shoichi ,  Odaka, Teruaki

    IPC分类号： H02M07/04 ,  H05B06/68

    CPC分类号： H05B6/666 ,  H05B2206/043

    摘要： A switching power supply, in which a series circuit consisting of a primary winding of a transformer (4) and a controllable switch (3) is connected with a DC power source (l0) and a secondary winding of the trans­former is connected with a first voltage source (50) outputting the voltage developed across the secondary winding during the on-period of the controllable switch and a second voltage source (60) storing the exciting energy of the transformer during the off-period of the controllable switch by using the exciting inductance of the transformer as a current source, a series circuit consisting of the first and the second voltage sources being connected with a load (70). Owing to this construction, even if voltage-current characteristic of a load having constant voltage chracteristic, such as a magnetron, vary due to variations in the temperature, etc., the output voltage is automatically compensated and a stable electric power can be supplied to the load.

    摘要翻译： 一种开关电源，其中由变压器（4）的初级绕组和可控开关（3）组成的串联电路与直流电源（10）连接，并且变压器的次级绕组与第一 在可控开关的接通周期期间输出在次级绕组两端产生的电压的电压源（50），以及通过使用激励在可控开关的断开周期期间存储变压器的激励能量的第二电压源（60） 作为电流源的变压器的电感，由第一和第二电压源组成的串联电路与负载（70）连接。 由于这种结构，即使诸如磁控管之类的具有恒定电压特性的负载的电压 - 电流特性由于温度变化等而变化，输出电压也被自动补偿，并且稳定的电力可被提供给 负载。

    Power conversion system, method for controlling the same, and uninterruptible power supply using the same
    8.
    发明公开
    Power conversion system, method for controlling the same, and uninterruptible power supply using the same 失效
    功率转换系统，其控制方法和使用其的不间断电源

    公开(公告)号：EP0487970A3

    公开(公告)日：1992-09-02

    申请号：EP91119274.8

    申请日：1991-11-12

    申请人： HITACHI, LTD.

    发明人： Yamato, Ikuo ,  Tokunaga, Norikazu

    IPC分类号： H02M7/48 ,  H02M5/297

    CPC分类号： H02M7/4807

    摘要： A three-phase a.c. uninterruptible power supply includes a transformer needing insulation, a single-phase inverter (2), and a cycloconverter (4). The uninterruptible power supply operates to convert a d.c. voltage into a high-frequncy a.c. voltage in the single-phase inverter (2), transmit the output voltage of the single-phase inverter (2) in an insulating state, and convert the output of the transformer into a three-phase voltage having a lower frequency such as 50 or 60 Hz than the frequency of the output voltage of the single-phase inverter (2). It results in allowing the transformer needing insulation to use a high-frequency signal, thereby reducing the transformer itself in size.

    Power conversion system
    9.
    发明公开
    Power conversion system 失效
    电力转换系统

    公开(公告)号：EP0293869A3

    公开(公告)日：1989-11-02

    申请号：EP88108796.9

    申请日：1988-06-01

    申请人： HITACHI, LTD.

    发明人： Yamato, Ikuo ,  Tokunaga, Norikazu ,  Matsuda, Yasuo ,  Amano, Hisao

    IPC分类号： H02M3/315 ,  H02M3/335

    CPC分类号： H02M7/4807

    摘要： In a power conversion system, a DC voltage of a DC power supply (1) is converted into a predetermined high-frequency voltage by an inverter (2), and a high-frequency low voltage generated from the inverter (2) is converted into a high-frequency high voltage by a transformer (3). A high-frequency high voltage generated from a secondary winding of the transformer (3) is converted into a predetermined low-frequency voltage by a frequency changing circuit (4). The commutating operation of the frequency changing circuit (4) is performed by a control circuit (1000) in response to the output current of the frequency changing circuit (4) and in synchronism with the starting time of the short-circuiting prevention period of the inverter (2). As a result, the converted output of the power conversion system is prevented from decreasing.

    Switching power supply
    10.
    发明公开
    Switching power supply 失效
    Geschaltete Speisung。

    公开(公告)号：EP0239072A2

    公开(公告)日：1987-09-30

    申请号：EP87104305.5

    申请日：1987-03-24

    申请人： HITACHI, LTD. ,  Hitachi Nisshin Electronics Co., Ltd ,  Hitachi Device Engineering Co., Ltd.

    发明人： Yamato, Ikuo ,  Tokunaga, Norikazu ,  Amano, Hisao ,  Noguchi, Shoichi ,  Odaka, Teruaki

    IPC分类号： H02M7/04 ,  H05B6/68

    CPC分类号： H05B6/666 ,  H05B2206/043

    摘要： A switching power supply, in which a series circuit consisting of a primary winding of a transformer (4) and a controllable switch (3) is connected with a DC power source (l0) and a secondary winding of the trans­former is connected with a first voltage source (50) outputting the voltage developed across the secondary winding during the on-period of the controllable switch and a second voltage source (60) storing the exciting energy of the transformer during the off-period of the controllable switch by using the exciting inductance of the transformer as a current source, a series circuit consisting of the first and the second voltage sources being connected with a load (70). Owing to this construction, even if voltage-current characteristic of a load having constant voltage chracteristic, such as a magnetron, vary due to variations in the temperature, etc., the output voltage is automatically compensated and a stable electric power can be supplied to the load.

    摘要翻译： 一种开关电源，其中由变压器（4）的初级绕组和可控开关（3）组成的串联电路与直流电源（10）连接，变压器的次级绕组与第一 输出在所述可控开关的接通时段期间在所述次级绕组上产生的电压的电压源（50）以及在所述可控开关的断开期间期间通过使用所述令人兴奋的存储所述变压器的激励能量的第二电压源（60） 作为电流源的变压器的电感，由第一和第二电压源组成的串联电路与负载（70）连接。 由于这种结构，即使具有恒定电压特性的负载（例如磁控管）的电压电流特性由于温度变化等而变化，输出电压被自动补偿，并且可以向 负载。