| 摘要 |
A portable welding apparatus for use with a motor vehicle includes an internal combustion engine and an electrical current generating alternator operably connected to the engine to be driven thereby. The alternator is a three-phase AC alternator having a first DC rectifier which converts AC current to a first DC current using resistors across phase to lag each phase at 120 degrees allowing phases to operate simultaneously and a second DC rectifier which converts AC current to a second DC current using resistors across phase to lag each phase at 120 degrees allowing phases to operate simultaneously. The alternator includes a three phase armature having three windings and the first and second DC rectifiers each include six diodes connected to the armature, the diodes are configured in three parallel legs with each leg having two of the diodes, and the three legs are connected to separate ones of the three windings between the diodes. The armature is preferably wound in a wye configuration. The first and second DC rectifiers each have two of the resistors, a first one of the resistors connects a first one of the legs with a second one of the legs between the diodes, and a second one of the resistors connects the second one of the legs with a third one of the legs between the diodes. Preferably, exposed taps are provided for the AC current and the separate first and second DC currents.
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