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    • 2. 发明申请
    • METHOD FOR STARTING A SUBMERGED ARC WELDING PROCESS AND WELDING APPARATUS
    • 启动电弧焊接工艺和焊接设备的方法
    • WO2014067580A1
    • 2014-05-08
    • PCT/EP2012/071685
    • 2012-11-02
    • ESAB AB
    • RAUDSEPP, HannesANDERSSON, MartinJOHANSSON, TomasLJUNGKVIST, Rikard
    • B23K9/18B23K9/067B23K9/073
    • B23K9/188B23K9/067B23K9/073B23K9/0732B23K9/186
    • A method comprising an arc ignition phase (IP), an arc-stabilizing phase (AP) and a stable arc phase (SP). The arc stabilizing phase comprises an initial sub-phase (IS) comprising the step of feeding at least one hot wire (4, 12) at constant feed speed and a main sub-phase (MS) comprising the steps of feeding said hot wire at constant feed speed and feeding at least one cold wire (22) at constant feed speed. The stable arc phase comprises the steps of continuously adjusting the feed speed of the hot wire and continuously adjusting the feed speed of the cold wire. The invention also relates to a welding apparatus (1) for carrying out the method. The welding apparatus comprises a hot wire feeding means (150), a contact means (2), a cold wire feeding means (35) and a control unit (31). The control unit is adapted to control said hot wire feeding means to feed the hot wire at a constant feed speed during the initial sub-phase, feed the hot wire at a constant feed speed during the main sub-phase and to continuously during the stable arc phase adjust the feed speed of the hot wire. The control unit is adapted to control said cold wire feeding means to feed the cold wire at a constant feed speed during the main sub-phase and continuously during the stable arc phase adjust the cold wire feed speed.
    • 一种包括电弧点火相(IP),电弧稳定相(AP)和稳定电弧相(SP)的方法。 电弧稳定阶段包括初始子相(IS),包括以恒定进料速度供给至少一根热丝(4,12)和主亚相(MS)的步骤,包括以下步骤:将所述热丝进料到 进给速度恒定,并以恒定进给速度供给至少一根冷丝(22)。 稳定的电弧阶段包括连续调整热丝的进给速度并连续调节冷丝的进给速度的步骤。 本发明还涉及一种用于实施该方法的焊接设备(1)。 焊接装置包括热丝进给装置(150),接触装置(2),冷丝进给装置(35)和控制单元(31)。 控制单元适于控制所述热丝进给装置,以在初始次相期间以恒定进给速度供给热丝,在主次相期间以恒定进给速度供给热丝,并在稳定期间连续进给 电弧相位调整热丝的进给速度。 控制单元适于控制所述冷丝进给装置,以在主子相期间以恒定进给速度供给冷丝,并且在稳定的电弧相位期间连续地调节冷丝进给速度。
    • 6. 发明申请
    • METHOD AND APPARATUS FOR FEEDBACK SIGNAL GENERATION IN SIGMA-DELTA ANALOG-TO-DIGITAL CONVERTERS
    • SIGMA-DELTA模拟数字转换器中反馈信号产生的方法和装置
    • WO2008071791A1
    • 2008-06-19
    • PCT/EP2007/063971
    • 2007-12-14
    • TELEFONAKTIEBOLAGET LM ERICSSON (publ)SUNDSTRÖM, LarsANDERSSON, Martin
    • SUNDSTRÖM, LarsANDERSSON, Martin
    • H03M3/02
    • H03M3/464
    • A method and apparatus taught herein provide a digital-to-analog converter (DAC) for use in a conversion feedback path of a sigma-delta type analog-to-digital converter (ADC). The DAC uses current pulse shaping to generate a conversion feedback signal in each feedback cycle of the ADC that provides a consistent charge transfer for accurate digital conversion and has a controlled current pulse shape. In one or more embodiments, the DAC includes a capacitor circuit for charge storage and transfer and a (series) resistive circuit having variable resistance for current pulse shape control. In at least one embodiment, current pulse control limits a peak current of the conversion feedback signal, thereby reducing DC power consumption and gain-bandwidth (GBW) and slew rate requirements of the ADC's integration amplifier, and limiting residual (ending) current in each feedback cycle, which yields commensurate gains in (feedback cycle) clock jitter insensitivity.
    • 本文教导的方法和装置提供了用于Σ-Δ型模数转换器(ADC)的转换反馈路径中的数模转换器(DAC)。 DAC使用电流脉冲整形在ADC的每个反馈周期中产生转换反馈信号,提供一致的电荷传输以实现精确的数字转换,并具有受控的电流脉冲形状。 在一个或多个实施例中,DAC包括用于电荷存储和传输的电容器电路和具有用于电流脉冲形状控制的可变电阻的(串联)电阻电路。 在至少一个实施例中,电流脉冲控制限制了转换反馈信号的峰值电流,从而降低了ADC集成放大器的直流功耗和增益带宽(GBW)和转换速率要求,并限制了每个 反馈周期,其在(反馈周期)时钟抖动不敏感性中产生相当的增益。
    • 7. 发明公开
    • METHOD FOR STARTING A SUBMERGED ARC WELDING PROCESS AND WELDING APPARATUS
    • VERFAHREN ZUM STARTEN EINES UNTERPULVER-SCHWEISSVERFAHRENS UND SCHWEISSVORRICHTUNG
    • EP2914398A1
    • 2015-09-09
    • EP12780743.6
    • 2012-11-02
    • ESAB AB
    • RAUDSEPP, HannesANDERSSON, MartinJOHANSSON, TomasLJUNGKVIST, Rikard
    • B23K9/18B23K9/067B23K9/073
    • B23K9/188B23K9/067B23K9/073B23K9/0732B23K9/186
    • A method comprising an arc ignition phase (IP), an arc-stabilizing phase (AP) and a stable arc phase (SP). The arc stabilizing phase comprises an initial sub-phase (IS) comprising the step of feeding at least one hot wire (4, 12) at constant feed speed and a main sub-phase (MS) comprising the steps of feeding said hot wire at constant feed speed and feeding at least one cold wire (22) at constant feed speed. The stable arc phase comprises the steps of continuously adjusting the feed speed of the hot wire and continuously adjusting the feed speed of the cold wire. The invention also relates to a welding apparatus (1) for carrying out the method. The welding apparatus comprises a hot wire feeding means (150), a contact means (2), a cold wire feeding means (35) and a control unit (31). The control unit is adapted to control said hot wire feeding means to feed the hot wire at a constant feed speed during the initial sub-phase, feed the hot wire at a constant feed speed during the main sub-phase and to continuously during the stable arc phase adjust the feed speed of the hot wire. The control unit is adapted to control said cold wire feeding means to feed the cold wire at a constant feed speed during the main sub-phase and continuously during the stable arc phase adjust the cold wire feed speed.
    • 一种包括电弧点火相(IP),电弧稳定相(AP)和稳定电弧相(SP)的方法。 电弧稳定阶段包括初始子相(IS),其包括以恒定进料速度供给至少一个热丝(4,12)和主亚相(MS)的步骤,包括以下步骤:将所述热丝进料 进给速度恒定,并以恒定进给速度供给至少一根冷丝(22)。 稳定的电弧阶段包括连续调整热丝进给速度并连续调节冷丝进给速度的步骤。 本发明还涉及一种用于实施该方法的焊接装置(1)。 焊接装置包括热丝进给装置(150),接触装置(2),冷丝进给装置(35)和控制单元(31)。 控制单元适于控制所述热丝供给装置,以在初始子阶段期间以恒定的进给速度供给热丝,在主子阶段期间以恒定的进给速度供给热丝,并且在稳定期间连续 电弧相位调整热丝的进给速度。 控制单元适于控制所述冷丝进给装置,以在主副相中以恒定的进给速度供给冷丝,并且在稳定的电弧相位期间连续地调节冷丝进给速度。