| 摘要 |
The invention relates to a resistance welding device (1) comprising a power source (10) in order to provide a welding current for welding workpieces (2, 3), a welding gun (4) with two gun arms (5) comprising one electrode (7) each in order to impress the welding current into the workpieces (2, 3), wherein the power source (10) comprises a heavy-current transformer (12) with at least one primary winding (13) and at least one secondary winding (14) with center tapping, a synchronous rectifier (16) connected with the at least one secondary winding (14) of the heavy-current transformer (12) and comprising circuit elements (24), and a circuit (17) for actuating the circuit elements (24) of the synchronous rectifier (16). For reduction of losses and improvement of efficiency, the power source (10) is arranged at the welding gun (4) and the power source (10) comprises at least four contacts (20, 21, 22, 23) to form a multi-point contacting, wherein two first contacts (20, 21) of one polarity are connected to the one gun arm (5) and two additional contacts (22, 23) of opposite polarity are connected to the other gun arm (5). |
