Welder system having controllable dual winding alternator

#1. Field of the Invention:

#This invention relates in general to electric welding systems and in particular to electric welding systems having alternators with remotely controllable outputs. Still more particularly the present invention relates to alternators for use in welding systems which incorporate dual three-phase windings.

#2. Description of the Prior Art:

#The novel features believed characteristic of the invention are set forth in the appended claims. The invention itself however, as well as a preferred mode of use, further objects and advantages thereof, will best be understood by reference to the following detailed description of an illustrative embodiment when read in conjunction with the accompanying drawings, wherein:

#FIG. 1 is a representation of an arcuate section of the stator of the dual winding alternator utilized with the welding system of the present invention; and

#FIGS. 2A and 2B form a composite schematic diagram of the welding system of the present invention.

#With reference now to the figures and in particular with reference to FIG. 1, there is depicted a representation of arcuate section 30 of the stator of the dual winding alternator which is utilized with the welding system of the present invention. As may be seen, arcuate section 30 includes a ferromagnetic core 10 which is generally fabricated by laminating multiple layers of ferromagnetic material. In a preferred embodiment of the present invention, ferromaqnetic core 10 includes forty-eight slots 12, each of which extends in a direction parallel to the axis of the stator. Each slot 12 is lined with an insulating insert 14 which is utilized to prevent electrical contact between individual windings and ferromagnetic core 10.

#As is illustrated, ferromagnetic core 10 is wound with two sets of three-phase windings. A first set of windings includes windings 18, 20, and 22 which are each wound around three segments of ferromagnetic core 10. Since ferromagnetic core 10 includes fortyeight segments, each phase will include sixteen coils. In a preferred embodiment of the present invention, windings 18, 20, and 22 are provided by utilizing 13 A.W.G. electrically conductive wire which is coated with electrical insulation.

#In accordance with an important feature of the present invention, a second set of three-phase windings including windings 24, 26, and 28 are also provided. As may be seen, winding 24 overlies winding 18 and is wrapped into the same slots within ferromagnetic core 10. Similarly, winding 26 overlies winding 20 and winding 28 overlies winding 22. Windings 24, 26, and 28 are provided by utilizing 18 A.W.G. electrically conductive wire which is also coated with electrical insulation. Finally, an insulated plug 16 is utilized to retain the various winding coils within each slot 12.