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33 条记录 (耗时 0.026 秒)

    Current and frequency converter having means to reduce switching losses
    2.
    发明授权
    Current and frequency converter having means to reduce switching losses 失效
    电流和频率转换器具有减少开关损耗的手段

    公开(公告)号：US4855887A

    公开(公告)日：1989-08-08

    申请号：US247508

    申请日：1988-09-22

    申请人： Ikuo Yamato ,  Norikazu Tokunaga ,  Yasuo Matsuda ,  Hisao Amano

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

    IPC分类号： H02M1/00 ,  H02M1/32 ,  H02M3/315 ,  H02M7/48

    CPC分类号： H02M1/32 ,  H02M3/315 ,  H02M7/4807

    摘要： A power conversion apparatus comprises an inverter for converting a voltage of a DC power source into AC power having a frequency higher than the commercial frequency, a transformer, fed by the inverter, for outputting AC power, which is adjusted at a desired voltage, a frequency converter, formed by two pairs of two gate turn-off thyristors (GTOs) connected in reverse-parallel, for converting the frequency of the AC power supplied from the transformer into the commercial frequency, and an energy regenerating device having capacitors for absorbing the energy of a spike voltage occurring due to a circuit inductance upon interruption of a current of each GTO of the frequency converter and a bridge circuit, formed by GTOs and diodes connected in reverse-paralel therewith, for switching over the direction of connecting the capacitors with a secondary winding of the transformer in accordance with the polarity of a voltage of the secondary winding in such a manner that the energy stored in the capacitors is regenerated to the transformer.

    Pulse width modulated inverter with high-to-low frequency output converter
    3.
    发明授权
    Pulse width modulated inverter with high-to-low frequency output converter 失效
    脉宽调制逆变器具有高到低频率输出转换器

    公开(公告)号：US4878163A

    公开(公告)日：1989-10-31

    申请号：US201755

    申请日：1988-06-03

    申请人： Ikuo Yamato ,  Norikazu Tokunaga ,  Yasuo Matsuda ,  Hisao Amano

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

    IPC分类号： H02M7/48

    CPC分类号： H02M7/4807

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

    Semiconductor switching device having plural MOSFET's, GTO's or the like connected in series
    5.
    发明授权
    Semiconductor switching device having plural MOSFET's, GTO's or the like connected in series 失效
    具有串联连接的多个MOSFET，GTO等的半导体开关元件

    公开(公告)号：US4692643A

    公开(公告)日：1987-09-08

    申请号：US665132

    申请日：1984-10-26

    申请人： Norikazu Tokunaga ,  Hiroshi Fukui ,  Kouzou Watanabe ,  Hisao Amano ,  Masayoshi Sato

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

    IPC分类号： H03K17/10 ,  H03K17/687 ,  H03K17/60

    CPC分类号： H03K17/102

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

    摘要翻译： 半导体开关器件包括串联连接的多个开关元件的一行。 输入最近开关元件的输入端和输出最近开关元件的输出端分别与半导体开关器件的输入端和输出端相连。 控制信号被施加到输出最近的开关元件的控制端子。 半导体开关器件包括第一多个电容元件，每个电容元件连接在开关元件列之间的输出接近开关元件的输出端子和相邻开关元件的输入接近开关元件的控制端子之间; 以及连接在输入 - 最近开关元件的输出端子和输入端子之间的第二电容元件。 至少开关元件（S2-Sn）分别具有绝缘栅极。

    Power supply apparatus for resistance welder including means for preventing polarized transformer excitation
    6.
    发明授权
    Power supply apparatus for resistance welder including means for preventing polarized transformer excitation 失效
    电阻焊机用电源装置，包括防止极化变压器励磁的装置

    公开(公告)号：US4306138A

    公开(公告)日：1981-12-15

    申请号：US42067

    申请日：1979-05-24

    申请人： Norikazu Tokunaga ,  Hisao Amano ,  Yorito Jifuku

    发明人： Norikazu Tokunaga ,  Hisao Amano ,  Yorito Jifuku

    IPC分类号： B23K11/25 ,  B23K11/24

    CPC分类号： B23K11/256

    摘要： A power supply apparatus for a resistance welder has an inverse-parallel thyristor circuit for constrolling the welding current. One of thyristors connected in inverse-parallel relationship is turned on by a first signal whose reference phase is established by a synchronizing signal which is based on a voltage wave form of an AC power source and the other thyristor is turned on by a second signal whose reference phase is established by a signal which is delayed half a period of the voltage wave form with respect to the first signal, so that integrals of positive and negative halves of the output voltage wave form of the inverse parallel thyristor circuit can always be made equal.

    摘要翻译： 用于电阻焊机的电源装置具有用于保持焊接电流的逆并联晶闸管电路。 以反平行关系连接的晶闸管中的一个被第一信号接通，该第一信号的参考相位由基于AC电源的电压波形的同步信号建立，另一个晶闸管由第二信号接通， 参考相位由相对于第一信号的电压波形的半周期延迟的信号建立，使得逆并联晶闸管电路的输出电压波形的正和负半部的积分总是能够相等 。

    Switching power supply
    7.
    发明授权
    Switching power supply 失效
    开关电源

    公开(公告)号：US4777575A

    公开(公告)日：1988-10-11

    申请号：US31533

    申请日：1987-03-23

    申请人： Ikuo Yamato ,  Norikazu Tokunaga ,  Hisao Amano ,  Shoichi Noguchi ,  Teruaki Odaka

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

    IPC分类号： H05B6/66 ,  H05B6/68 ,  H02M3/335

    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 and a controllable switch is connected with a DC power source and a secondary winding of the transformer is connected with a first voltage source outputting the voltage developed across the secondary winding during the on-period of the controllable switch and a second voltage source 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. Owing to this construction, even if voltage-current characteristic of a load having constant voltage characteristic, 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，其中由变压器的初级绕组和可控开关组成的串联电路与直流电源连接，变压器的次级绕组与第一电压源连接，第一电压源输出跨越次级的电压 在可控开关的导通期间绕组，以及通过使用变压器的励磁电感作为电流源，在可控开关的截止期间存储变压器的激励能量的第二电压源，串联电路由 第一和第二电压源与负载连接。 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。

    Power supply control system
    8.
    发明授权
    Power supply control system 失效
    电源控制系统

    公开(公告)号：US5297015A

    公开(公告)日：1994-03-22

    申请号：US555025

    申请日：1990-07-20

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

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

    IPC分类号： H01R13/642 ,  H01R13/66 ,  H01R29/00 ,  H02J3/00 ,  H02J4/00 ,  H02M1/10 ,  H02M7/537 ,  H01R25/00 ,  H02M7/155

    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 for converting electric power from a power supply to a load into that of a specification required by the load in response to a power specification information source provided on the load side. With a change in the load, the information source also changes, 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 adapted to operate selectively in accordance with requisite power information sources provided in or on the side of a plurality of loads, thereby providing a system realizing a flexible power supply. For application to a low power supply, the system comprises a plug having a power specification information source and a socket having a variable power converter.

    摘要翻译： 一种电源控制系统，其包括用于响应于设置在负载侧的电力指定信息源将电力从电源转换为负载的可变功率转换器，用于负载所要求的规格。 随着负载的变化，信息源也发生变化，从而提供能够满足不同负载的灵活的电源控制系统。 对于高电源的应用，系统包括多个可变功率转换器，其适于根据在多个负载中或其侧面设置的必需功率信息源选择性地进行操作，从而提供实现柔性电源的系统。 为了适用于低电源，该系统包括具有电力指定信息源的插头和具有可变功率转换器的插座。