| 摘要 |
The generator set comprises a high frequency, variable reluctance power generator 10, capacitive means 20 for power factor connection, and a controlled AC/DC converter 30 supplying the welding arc via a filter 40. The converter 30 may be phase-angle controlled by a unit 90 to give selected desired output V/I characteristics (Figure 8). The unit 90 has inputs from manual control 100, 200, 300, 600, 700, and inputs 40a, b representing the welding voltage and current. A variable reluctance auxiliary generator 10' supplies auxiliary equipment and via an exciter unit 70 provides constant current D.C. excitation for the generator 10,10'. A synchronous or asynchronous auxiliary generator may alternatively or additionally be provided (Figures 13,15). A three phase main power generator may be formed by three single phase generators keyed to the same shaft and with their stator or rotor teeth mutually displaced by 120 DEG C electrically. <IMAGE> |
