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    • 1. 发明申请
    • LEAKAGE CURRENT REDUCING APPARATUS
    • 泄漏电流减少装置
    • US20130010506A1
    • 2013-01-10
    • US13636209
    • 2011-04-01
    • Takuya SakaiSatoshi Azuma
    • Takuya SakaiSatoshi Azuma
    • H03B19/00H02M7/06H02M7/537H02M5/458
    • H02M1/15H02M2001/123
    • First windings of a first common mode transformer and second windings of a second common mode transformer are connected in series via connection lines. The windings are connected to an AC power supply via connection lines. The first windings are connected to a three-phase motor via connection lines, a converter, and an inverter. High-frequency leakage currents flowing in the connection lines are detected as a common mode voltage by a winding for common mode voltage detection. An output voltage is inputted via a filter to a voltage amplifier unit that amplifies the output voltage, and the amplified voltage is applied to a winding via a capacitor in substantially a same direction as a direction of the common mode voltage. As a result, leakage currents are reduced by induced voltages on the windings.
    • 第一共模变压器的第一绕组和第二共模变压器的第二绕组通过连接线串联连接。 绕组通过连接线连接到交流电源。 第一绕组经由连接线,转换器和逆变器连接到三相电动机。 通过用于共模电压检测的绕组将连接线中流过的高频漏电流检测为共模电压。 通过滤波器将输出电压输入到放大输出电压的电压放大器单元,并且将放大的电压经由电容器沿与共模电压的方向基本相同的方向施加到绕组。 结果,漏电流由绕组上的感应电压降低。
    • 2. 发明授权
    • Leakage current reduction apparatus that includes a voltage amplifier and a voltage applicator
    • 泄漏电流降低装置,包括电压放大器和电压施加器
    • US08755205B2
    • 2014-06-17
    • US13254497
    • 2010-03-04
    • Satoshi AzumaTakuya Sakai
    • Satoshi AzumaTakuya Sakai
    • H02M5/45
    • H02P27/06H02M7/48H02M2001/123
    • Three-phase windings 11-13 and 21-23 of a first common-mode transformer 1 and a second common-mode transformer 2 are connected in series through connecting lines 8r-8t, respectively. The windings 11-13 are connected to an unillustrated AC power supply by connecting lines 91r-91t. The windings 21-23 are connected to a three-phase motor by connecting lines 93r-93t and through a converter and an inverter which are unillustrated. A winding 14 for common-mode voltage detection detects high-frequency leakage currents flowing through the connecting lines 91r-91t as a common-mode voltage V1, and an output voltage V2 obtained by voltage amplification by a voltage amplifier 3 is applied to a winding 24 for common-mode voltage application in such a manner that the output voltage V2 works in generally the same direction as the common-mode voltage V1, thereby canceling out the high-frequency leakage currents through the windings 21-23. Since a voltage amplification method is used, it is possible to reduce the high-frequency leakage currents with a simpler configuration as compared to a conventional current amplification method.
    • 第一共模变压器1和第二共模变压器2的三相绕组11-13和21-23分别通过连接线8r-8t串联连接。 绕组11-13通过连接线91r-91t连接到未示出的AC电源。 绕组21-23通过连接线93r-93t并通过未示出的转换器和逆变器连接到三相电动机。 用于共模电压检测的绕组14检测作为共模电压V1流过连接线91r-91t的高频漏电流,并且通过电压放大器3通过电压放大获得的输出电压V2被施加到绕组 24,用于共模电压施加,使得输出电压V2与共模电压V1大致相同的方向工作,从而消除通过绕组21-23的高频漏电流。 由于使用电压放大方法,与传统的电流放大方法相比,可以以更简单的配置来降低高频漏电流。
    • 3. 发明授权
    • Leakage current reducing apparatus
    • 泄漏电流减少装置
    • US08649193B2
    • 2014-02-11
    • US13636209
    • 2011-04-01
    • Takuya SakaiSatoshi Azuma
    • Takuya SakaiSatoshi Azuma
    • H02M1/12H02M1/16
    • H02M1/15H02M2001/123
    • First windings of a first common mode transformer and second windings of a second common mode transformer are connected in series via connection lines. The windings are connected to an AC power supply via connection lines. The first windings are connected to a three-phase motor via connection lines, a converter, and an inverter. High-frequency leakage currents flowing in the connection lines are detected as a common mode voltage by a winding for common mode voltage detection. An output voltage is inputted via a filter to a voltage amplifier unit that amplifies the output voltage, and the amplified voltage is applied to a winding via a capacitor in substantially a same direction as a direction of the common mode voltage. As a result, leakage currents are reduced by induced voltages on the windings.
    • 第一共模变压器的第一绕组和第二共模变压器的第二绕组通过连接线串联连接。 绕组通过连接线连接到交流电源。 第一绕组经由连接线,转换器和逆变器连接到三相电动机。 通过用于共模电压检测的绕组将连接线中流过的高频漏电流检测为共模电压。 通过滤波器将输出电压输入到放大输出电压的电压放大器单元,并且将放大的电压经由电容器沿与共模电压的方向基本相同的方向施加到绕组。 结果,漏电流由绕组上的感应电压降低。
    • 4. 发明申请
    • HIGH-FREQUENCY CURRENT REDUCTION DEVICE
    • 高频电流减少装置
    • US20150003124A1
    • 2015-01-01
    • US14368182
    • 2012-05-29
    • Takuya SakaiSatoshi Azuma
    • Takuya SakaiSatoshi Azuma
    • H02M1/08H02M5/458
    • H02M1/08H02M1/12H02M1/15H02M1/44H02M5/458H02M5/4585H02M2001/0038H02M2001/123
    • In a system line for supplying power from an AC power source to a load through a converter and an inverter, a noise reduction unit is connected to a single connection line between the AC power source and the converter. In the noise reduction unit, a current transformer detects a noise current flowing through the connection line after converting it to a voltage, and the detected voltage V1 is supplied through a filter device to a voltage amplifier followed by being voltage-amplified and applied to a capacitor. The capacitor is connected to an injection point on the connection line, so that a high-frequency current in the same direction as the noise current is supplied to the converter from the connection line, to thereby reduce a high-frequency noise current at the AC power source side.
    • 在用于通过转换器和逆变器从AC电源向负载供电的系统线路中,降噪单元连接到AC电源和转换器之间的单个连接线。 在降噪单元中,电流互感器检测在将其转换成电压之后流过连接线的噪声电流,并且将检测电压V1通过滤波器装置提供给电压放大器,然后进行电压放大并施加到 电容器。 电容器连接到连接线上的注入点,使得与连接线路向转换器提供与噪声电流相同方向的高频电流,从而降低AC处的高频噪声电流 电源侧。
    • 5. 发明申请
    • LEAKAGE CURRENT REDUCING APPARATUS
    • 泄漏电流减少装置
    • US20130147419A1
    • 2013-06-13
    • US13818860
    • 2011-06-16
    • Takuya SakaiSatoshi Azuma
    • Takuya SakaiSatoshi Azuma
    • H02P6/00
    • H02P6/002H02M1/12H02M1/44H02M5/4585H02M2001/123H02P27/04
    • In a system supplying power from an AC power supply to a three-phase motor via a converter and an inverter, a leakage current reducing apparatus is connected to a connection line between the AC power supply and the converter. A common mode transformer detects, as common mode voltage, common mode current flowing from the AC power supply to the connection line. The common mode voltage is inputted to a voltage amplifier via a filter apparatus. Output voltage obtained by voltage amplification passes through a capacitor and then is applied as an AC component to a neutral point of capacitors connected in a Y-connection fashion, so as to have the same phase as that of the common mode voltage. Thus, current having the same phase as that of the common mode current is supplied via the capacitors to the converter through the connection line, thereby reducing the common mode current.
    • 在通过转换器和逆变器从AC电源向三相电动机供电的系统中,将漏电流降低装置连接到AC电源和转换器之间的连接线。 共模变压器作为共模电压检测从AC电源流向连接线的共模电流。 共模电压通过滤波器装置输入到电压放大器。 通过电压放大获得的输出电压通过电容器,然后作为交流分量施加到以Y形连接方式连接的电容器的中性点,以便具有与共模电压相同的相位。 因此,具有与共模电流相同相位的电流通过电容器经由连接线被提供给转换器,从而降低共模电流。
    • 6. 发明申请
    • LEAKAGE CURRENT REDUCTION APPARATUS
    • 泄漏电流减少装置
    • US20110317455A1
    • 2011-12-29
    • US13254497
    • 2010-03-04
    • Satoshi AzumaTakuya Sakai
    • Satoshi AzumaTakuya Sakai
    • H02M1/00H02M5/45H02M7/44H02M7/04
    • H02P27/06H02M7/48H02M2001/123
    • Three-phase windings 11-13 and 21-23 of a first common-mode transformer 1 and a second common-mode transformer 2 are connected in series through connecting lines 8r-8t, respectively. The windings 11-13 are connected to an unillustrated AC power supply by connecting lines 91r-91t. The windings 21-23 are connected to a three-phase motor by connecting lines 93r-93t and through a converter and an inverter which are unillustrated. A winding 14 for common-mode voltage detection detects high-frequency leakage currents flowing through the connecting lines 91r-91t as a common-mode voltage V1, and an output voltage V2 obtained by voltage amplification by a voltage amplifier 3 is applied to a winding 24 for common-mode voltage application in such a manner that the output voltage V2 works in generally the same direction as the common-mode voltage V1, thereby canceling out the high-frequency leakage currents through the windings 21-23. Since a voltage amplification method is used, it is possible to reduce the high-frequency leakage currents with a simpler configuration as compared to a conventional current amplification method.
    • 第一共模变压器1和第二共模变压器2的三相绕组11-13和21-23分别通过连接线8r-8t串联连接。 绕组11-13通过连接线91r-91t连接到未示出的AC电源。 绕组21-23通过连接线93r-93t并通过未示出的转换器和逆变器连接到三相电动机。 用于共模电压检测的绕组14检测作为共模电压V1流过连接线91r-91t的高频漏电流,并且通过电压放大器3通过电压放大获得的输出电压V2被施加到绕组 24,用于共模电压施加,使得输出电压V2与共模电压V1大致相同的方向工作,从而消除通过绕组21-23的高频漏电流。 由于使用电压放大方法,与传统的电流放大方法相比,可以以更简单的配置来降低高频漏电流。
    • 7. 发明授权
    • Leakage current reducing apparatus
    • 泄漏电流减少装置
    • US09099945B2
    • 2015-08-04
    • US13818860
    • 2011-06-16
    • Takuya SakaiSatoshi Azuma
    • Takuya SakaiSatoshi Azuma
    • H02P1/46H02M5/45H02P6/00H02M1/12H02M1/44H02M5/458H02P27/04
    • H02P6/002H02M1/12H02M1/44H02M5/4585H02M2001/123H02P27/04
    • In a system supplying power from an AC power supply to a three-phase motor via a converter and an inverter, a leakage current reducing apparatus is connected to a connection line between the AC power supply and the converter. A common mode transformer detects, as common mode voltage, common mode current flowing from the AC power supply to the connection line. The common mode voltage is inputted to a voltage amplifier via a filter apparatus. Output voltage obtained by voltage amplification passes through a capacitor and then is applied as an AC component to a neutral point of capacitors connected in a Y-connection fashion, so as to have the same phase as that of the common mode voltage. Thus, current having the same phase as that of the common mode current is supplied via the capacitors to the converter through the connection line, thereby reducing the common mode current.
    • 在通过转换器和逆变器从AC电源向三相电动机供电的系统中,将漏电流降低装置连接到AC电源和转换器之间的连接线。 共模变压器作为共模电压检测从AC电源流向连接线的共模电流。 共模电压通过滤波器装置输入到电压放大器。 通过电压放大获得的输出电压通过电容器,然后作为交流分量施加到以Y形连接方式连接的电容器的中性点,以便具有与共模电压相同的相位。 因此,具有与共模电流相同相位的电流通过电容器经由连接线被提供给转换器,从而降低共模电流。