| 摘要 |
PURPOSE:To reduce loss of energy and make the size of the machine small by providing switching elements between an electric power source and plural electrodes and enabling to supply energy accumulated in wiring inductance to electrodes. CONSTITUTION:The machine consists of plural electrodes 3, 3' connected in parallel, switching elements of transistors Q3, Q4 switched in series by high frequency, fly wheel diodes D1, D2 and a switching device that switches energizing of switching elements successively by low frequency. Above-mensioned diodes D1, D2 are installed in parallel to welding load and supply accumulated energy accumulated in the wiring inductance during on-period of transistors Q3, Q4 to electrodes 3, 3' during off-period. By this welding machine, loss of energy is decreased and the machine can be miniaturized. |
