公开(公告)号：US6040556A

公开(公告)日：2000-03-21

申请号：US162785

申请日：1998-09-30

申请人： Keigo Shinya ,  Wen Long Kou ,  Osamu Suzuki ,  Shunichi Tetsui

发明人： Keigo Shinya ,  Wen Long Kou ,  Osamu Suzuki ,  Shunichi Tetsui

IPC分类号： B23K9/10 ,  B23K9/095

CPC分类号： B23K9/1043

摘要： An engine driven arc welder including a welding generator driven by an engine; output circuits for controlling the output of the welding generator in accordance with a control signal and for delivering the output to welding output terminals; a current detector for detecting the current flowing in the welding output terminals; an error detector for comparing the output of the current detector with a reference signal to detect error; a control signal producing circuit for producing the control signal in accordance with output of the error detector and for delivering it to the output circuit; and a voltage detector R10, VR10 for detecting voltage to be delivered to the welding output terminals, wherein the arc welder has a welding output characteristic having a constant current control arc characteristic in accordance with the reference signal and which exhibits a drooping characteristic in the vicinity of the arcing voltage and which is capable of increasing the current when the arc voltage is lowered. The engine driven arc welder includes an adjustment circuit VR10, R10, VR20, R20 for determining the magnitude of the reference signal to be delivered to the error detector in accordance with the output of the voltage detector to change the reference signal, thereby allowing the inter-characteristic transfer point between the constant current control arc characteristic and the drooping characteristic to be adjustable.

摘要翻译： 一种发动机驱动的电弧焊机，包括由发动机驱动的焊接发电机; 输出电路，用于根据控制信号控制焊接发生器的输出，并将输出传送到焊接输出端子; 用于检测在焊接输出端子中流动的电流的电流检测器; 用于将电流检测器的输出与参考信号进行比较以检测误差的误差检测器; 控制信号产生电路，用于根据误差检测器的输出产生控制信号并将其传送到输出电路; 以及电压检测器R10，VR10，用于检测输送到焊接输出端子的电压，其中，电弧焊机具有根据参考信号具有恒定电流控制电弧特性的焊接输出特性，并且在附近呈现下垂特性 的电弧电压，并且当电弧电压降低时能够增加电流。 发动机驱动的电弧焊机包括调整电路VR10，R10，VR20，R20，用于根据电压检测器的输出来确定要传送到误差检测器的参考信号的大小，以改变参考信号， 恒流控制电弧特性与下垂特性之间的特征转移点可调。