| 摘要 |
PURPOSE:To make a welding interval suitable for a high speed welding line by installing the 1st and 2nd capacitors, and using the electric charge in the 1st capacitor for charging the 2nd capacitor when the 2nd capacitor is put in the discharging state. CONSTITUTION:When the timing signal of a timing control circuit 38 shifts from a low to high level upon opening of a switch 42 by the rotation of a cam 44, a switching control circuit 32 generates a high level output and a switching transistor 6 shifts to a conducting state. As a result, the 1st capacitor 28 and the 2nd capacitor 30 are short circuited, then the charge charged in the capacitor 28 migrates to the 2nd capacitor 30, and the capacitor 30 is charged. The charging in the 1st capacitor 28, and the discharging and charging of the 2nd capacitor 30 accompanied with welding are thus completed in response with the rotation of the cam 44 in one round period and since the charging in the capacitor 30 is instantaneously completed, the time from the welding to the succeeding welding is reduced. |
