利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

33 条记录 (耗时 0.023 秒)

    Current and frequency converter having means to reduce switching losses
    1.
    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
    2.
    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.

    Switching power supply
    3.
    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
    4.
    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。

    Parallel inverter control apparatus
    8.
    发明授权
    Parallel inverter control apparatus 失效
    并联逆变器控制装置

    公开(公告)号：US5262935A

    公开(公告)日：1993-11-16

    申请号：US795739

    申请日：1991-11-21

    申请人： Hidefumi Shirahama ,  Ikuo Yamato ,  Yoshimi Sakurai ,  Norikazu Tokunaga

    发明人： Hidefumi Shirahama ,  Ikuo Yamato ,  Yoshimi Sakurai ,  Norikazu Tokunaga

    IPC分类号： H02J3/38 ,  H02J3/46 ,  H02M7/493 ,  H02M7/5387

    CPC分类号： H02M7/493 ,  H02J3/46

    摘要： A structure is disclosed in which instantaneous phase and voltage difference values between the output voltage waveform from an inverter and the output voltage waveform from another AC power source are detected to correct the phase and the level of the output voltage waveform from the inverter so that the phase difference and the voltage difference can be controlled at high speed. As a result, excess current, which occurs if the inverter is operated at high frequencies, can be effectively controlled so that a stable parallel operation of the inverter with another AC power source is possible to perform.

    摘要翻译： 公开了一种结构，其中检测来自逆变器的输出电压波形与来自另一AC电源的输出电压波形之间的瞬时相位和电压差值，以校正来自逆变器的输出电压波形的相位和电平，使得 相位差和电压差可以高速控制。 结果，可以有效地控制逆变器在高频下工作时发生的过电流，从而可以进行与另一个AC电源的稳定的并联运行。

    Power conversion system, method for controlling the same, and uninterruptible power supply using the same
    10.
    发明授权
    Power conversion system, method for controlling the same, and uninterruptible power supply using the same 失效
    电力转换系统，其控制方法以及不间断电源

    公开(公告)号：US5285365A

    公开(公告)日：1994-02-08

    申请号：US797924

    申请日：1991-11-26

    申请人： Ikuo Yamato ,  Norikazu Tokunaga

    发明人： Ikuo Yamato ,  Norikazu Tokunaga

    IPC分类号： H02M5/27 ,  H02J9/06

    CPC分类号： H02M7/4807

    摘要： A three-phase a.c. uninterruptible power supply includes a transformer providing isolation between an input and an output, a single-phase inverter, and a cycloconverter. The uninterruptible power supply operates to convert a d.c. voltage into a high-frequency a.c. voltage in the single-phase inverter, transmit the output voltage of the single-phase inverter in an isolated 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. This enables the transformer providing isolation to operate at a high frequency, thereby enabling the size of the transformer to be reduced.

    摘要翻译： 三相交流 不间断电源包括一个提供输入和输出之间隔离的变压器，单相逆变器和循环换流器。 不间断电源用于转换直流电源。 电压进入高频电源。 单相逆变器的电压，将单相逆变器的输出电压传输到隔离状态，并将变压器的输出转换为具有较低频率（例如50或60 Hz）的三相电压， 单相逆变器输出电压的频率。 这使得变压器能够提供隔离以在高频率下工作，从而能够减小变压器的尺寸。