Welding apparatus and transformer therefor
First Claim
1. A welding apparatus comprising:
- a casing having electrically insulating walls;
first and second welding electrodes; and
a welding transformer having a toroidal core, a primary winding, and a secondary winding,the toroidal core comprising a grain-oriented silicon steel material coiled with an insulating material to provide an axial passage therethrough,the primary winding having turns surrounding at least a portion of the core to provide external sections adjacent outer walls of the core and internal sections adjacent inner walls of the core located within the axial passage,the secondary winding including a first arm section connected to the first welding electrode, a second arm section connected to the second welding electrode, and a cable-like section connecting the first and second arm sections, a portion of the secondary winding passing through the core'"'"'s axial passage adjacent the internal sections of the primary winding turns, the secondary winding forming a single turn about the core.
1 Assignment
0 Petitions
Accused Products
Abstract
A welding apparatus is disclosed to include an electrically insulating casing, first and second welding electrodes, and a welding transformer having a toroidal core, a multi-turn primary winding and a single-turn secondary winding. The core includes a grain-oriented silicon steel material coiled with an insulator. The primary winding has turns axially wound about the core. The secondary winding includes two conductive arm sections which are connected to the electrodes and a wound section including conductive wire cable which electrically connects the two arm sections. One of the arm sections can provide the frame member to support the transformer. The apparatus is suitable for spot or linear welding.
39 Citations
16 Claims
-
1. A welding apparatus comprising:
-
a casing having electrically insulating walls; first and second welding electrodes; and a welding transformer having a toroidal core, a primary winding, and a secondary winding, the toroidal core comprising a grain-oriented silicon steel material coiled with an insulating material to provide an axial passage therethrough, the primary winding having turns surrounding at least a portion of the core to provide external sections adjacent outer walls of the core and internal sections adjacent inner walls of the core located within the axial passage, the secondary winding including a first arm section connected to the first welding electrode, a second arm section connected to the second welding electrode, and a cable-like section connecting the first and second arm sections, a portion of the secondary winding passing through the core'"'"'s axial passage adjacent the internal sections of the primary winding turns, the secondary winding forming a single turn about the core. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A transformer for a welding apparatus having first and second welding electrodes, said transformer comprising:
-
a toroidal core comprising a strip of grain-oriented silicon steel material rolled with an insulating material to provide an axial passage therethrough; a primary winding having turns surrounding at least a portion of the core to provide external sections adjacent outer walls of the core and internal sections adjacent inner walls of the core located within the axial passage; and a secondary winding including a first arm section connectable with the first welding electrode, a second arm section connectable with the second welding electrode, and a cable-like section electrically connecting the first and second arm sections, a portion of the secondary winding passing through the core'"'"'s axial passage adjacent the internal sections of the primary winding turns, the secondary winding forming a single turn about the core. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
-
Specification