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US 6,611,189 B2Granted
Welding power supply transformer
AssigneeIllinois Tool Works Inc.
InventorDennis Sigl
Life of this patent
Estimating the term…
Abstract
A welding-type power supply transformer including a bobbin, a first coil and a second coil is disclosed. The first coil is wound around the bobbin. The second coil is magnetically coupled to the first coil.
Claims39
A welding-type power supply transformer comprising:
- a bobbin having elongated top and bottom surfaces and first and second substantially semi-circular end surfaces connecting the top surface with the bottom surface to form an elongated first coil winding surface having a central axis;
- a first coil wound around the first coil winding surface;
- and
- a second coil magnetically coupled to the first coil and wound thereto.
1 more element
A welding-type power supply transformer comprising:
- a bobbin having a central axis and a first winding window located about die central axis, wherein the first winding window includes a first coil winding surface and first and second bobbin sidewalls each located on opposite sides of the first coil winding surface;
- a first wire exit in open communication with the first winding window;
- a first coil wound around the first coil winding surface and having a first lead end exiting the first winding window through the wire exit such that the first lead end exits the bobbin in a direction that is substantially perpendicular to the central axis;
- and
- a second coil magnetically coupled to the first coil and wound concentric to the first coil about the bobbin.
2 more elements
A welding-type power supply transformer comprising:
- a bobbin having a first coil winding surface;
- a first coil wound around the first coil winding surface;
- a second coil wound concentric to the first coil;
- and
- a cover, wherein the first coil and the second coil are compressed between the first coil winding surface and the cover.
2 more elements
A welding-type power supply transformer comprising:
- a first coil;
- a second coil magnetically coupled to the first coil, wherein the second coil includes a plurality of second coil turns;
- and
- a plurality of locating spacers disposed to maintain a desired spacing between each of the plurality of second coil turns.
1 more element
A method of reducing the leakage inductance in a welding-type power supply transformer comprising:
- providing a first coil;
- winding a second coil concentric to the first coil;
- and
- compressing the first coil and the second coil together to reduce the leakage inductance between the first coil and the second coil to a desired value.
1 more element
A welding-type power supply transformer comprising:
- a bobbin having a central axis and a first coil winding surface located about the central axis;
- a first coil wound around the first coil winding surface and having a first lead end;
- a second coil magnetically coupled to the first coil and wound concentric thereto;
- and
- means for guiding the first lead end out of the bobbin and preventing intersection of the second coil wit the first lead end.
2 more elements
A welding-type power supply transformer comprising:
- a bobbin having a first coil winding surface;
- a first coil wound around the first coil winding surface;
- a second coil wound concentric to the first coil;
- and
- means for compressing the first coil and the second coil together.
2 more elements
A welding-type power supply transformer comprising:
- a first coil;
- a second coil magnetically coupled to the first coil, wherein the second coil includes a plurality of second coil turns;
- and
- means for maintaining a desired spacing between each of the plurality of second coil turns.
1 more element
A bobbin for a transformer assembly comprising:
- a molded body having a pair of substantially flat coil supporting surfaces and at least two substantially semicircular end coil supporting surfaces, wherein the at least two substantially semicircular end coil supporting surfaces interconnect the pair of substantially flat coil supporting surfaces to form a continuous coil winding surface;
- and
- a pair of side walls integrated with the continuous coil winding surface to define a coil winding window.
Dependencies are inferred from the claim text.