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    • 16. 发明授权
    • Consumable electrode DC arc welder
    • 消弧电极直流电弧焊机
    • US5942139A
    • 1999-08-24
    • US009613
    • 1998-01-20
    • Haruo MoriguchiKenzo DanjoShigeru OkamotoAtsushi Kinoshita
    • Haruo MoriguchiKenzo DanjoShigeru OkamotoAtsushi Kinoshita
    • B23K9/173B23K9/073B23K9/095B23K9/10H02M9/00
    • B23K9/1043B23K9/0956
    • DC power from a smoothing capacitor is converted into high frequency power by an inverter, and then lowered by an output transformer. The lowered high frequency power is converted into DC power by an output rectifier and a DC reactor, and then supplied to a load. The load is short-circuited and then opened to initiate arcing. The short-circuiting and the arcing alternate. An auxiliary rectifier provides a load-voltage representative signal, and a current detector detects a load current. A load-current representative signal is differentiated by a differentiation circuit. The signals from the auxiliary rectifier, the current detector and the differentiation circuit, and a reference signal are applied to an operational amplifier. A control circuit controls the inverter such that the output of the operational amplifier can be zero. An integration circuit receives at least the load-voltage representative signal to detect a period of a cycle consisting of the arcing and the short-circuiting and provide an operation-cycle-period representative signal to the operational amplifier.
    • 来自平滑电容器的直流电力由逆变器转换为高频功率,然后由输出变压器降低。 降低的高频功率由输出整流器和直流电抗器转换为直流电力,然后提供给负载。 负载短路,然后打开以启动电弧。 短路和电弧交替。 辅助整流器提供负载电压代表信号,电流检测器检测负载电流。 负载电流代表信号由微分电路区分。 来自辅助整流器,电流检测器和微分电路的信号以及参考信号被施加到运算放大器。 控制电路控制逆变器,使得运算放大器的输出可以为零。 积分电路至少接收负载电压代表信号,以检测由电弧和短路组成的周期的周期,并向运算放大器提供操作周期代表信号。
    • 17. 发明授权
    • Power supply apparatus
    • 电源设备
    • US5831240A
    • 1998-11-03
    • US554529
    • 1995-11-07
    • Masao KatookaToru AraiShigeru OkamotoKenzo DanjoMasaharu Tanaka
    • Masao KatookaToru AraiShigeru OkamotoKenzo DanjoMasaharu Tanaka
    • B23K9/32B23K9/10
    • B23K9/323
    • A power supply apparatus includes first and second spaced-apart, substantially parallel panels, and a chassis disposed in substantially perpendicular to and between the first and second panels. Opposite edges of the chassis are coupled to the respective ones of the first and second panels to thereby partition the space between the first and second panels into upper and lower regions. A power supply circuit includes heat-generating electric components disposed in the lower region, and non-heat-generating components disposed in the upper region. The chassis has an opening therein and a heat sink is mounted to close the opening in the chassis. A semiconductor module of the power supply circuit is mounted on the surface facing to the upper region of the heat sink.
    • 电源装置包括第一和第二间隔开的基本上平行的面板,以及基本上垂直于第一和第二面板之间且在其之间设置的底架。 底盘的相对边缘联接到第一和第二面板中的相应边缘,从而将第一和第二面板之间的空间分隔成上部和下部区域。 电源电路包括设置在下部区域中的发热电气部件和设置在上部区域中的非发热部件。 底盘在其中具有开口,并且安装散热器以关闭底盘中的开口。 电源电路的半导体模块安装在面向散热器上部区域的表面上。