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    • 2. 发明授权
    • Consumable electrode type D.C. arc welder
    • 消耗电极型D.C.电弧焊机
    • US5306894A
    • 1994-04-26
    • US25775
    • 1993-03-03
    • Haruo MoriguchiTetsurou IkedaKenzo DanjoToshikazu FujiyoshiMasahiro AoyamaKunio Karino
    • Haruo MoriguchiTetsurou IkedaKenzo DanjoToshikazu FujiyoshiMasahiro AoyamaKunio Karino
    • B23K9/073B23K9/10G05F1/08H02M9/00
    • B23K9/1056G05F1/08
    • An invertor controlled D.C. arc welder of consumable electrode type which is arranged to rectify an a.c. power from a commercial power supply, convert it into a high frequency a.c. power by an invertor, rectify it again to obtain a d.c. power output for welding and stabilize the output voltage by feedback control of the invertor based upon the output voltage and provided with means for discriminating shorting and arcing periods of its welding load from the output voltage and additionally controlling the invertor based upon a resultant discrimination signal to raise the output voltage during the early time of the arcing period, thereby preventing defective welding due to insufficient output current. This invention is especially, effective for supplementing such insufficient output current as an aftereffect of insufficient output power during the shortening period in such welder which is provided with means for reducing the output voltage during the shortening period to prevent generation of undesirable spattering.
    • 一种易损电极类型的逆变器控制直流电弧焊机,其设置为对一个直流电源进行整流。 从商用电源供电,将其转换成高频率。 权力由逆变器,再次纠正获得一个d.c. 用于焊接的功率输出并且通过基于输出电压的逆变器的反馈控制来稳定输出电压,并且具有用于区分其焊接负载的短路和电弧周期与输出电压的装置,并且基于所得到的鉴别信号来控制逆变器 在电弧期的早期阶段提高输出电压,防止由于输出电流不足导致的焊接不良。 本发明特别有效地补充这种不足的输出电流,作为在这种焊接机的缩短期间输出功率不足的后果,其具有用于在缩短期间减小输出电压的装置,以防止产生不期望的飞溅。