Electric induction impeder
AssigneeInductotherm Corp.
InventorsPaul Scott, Michael Nallen, Oleg Fishman, John Mortimer
Life of this patent
Estimating the term…
Abstract
An impeder for use in an electric induction welding process is provided. Optionally the impeder does not require internal forced cooling. In embodiments using internal forced cooling a high efficiency cooling system is provided.
Claims22
An impeder for controlling the magnetic field path in an electric induction welding process, the impeder comprising:
- a plurality of magnetically conductive, high Curie temperature solid wires assembled in a bundle, each of the plurality of wires electrically isolated from each other;
- and
- a high temperature enclosure surrounding the plurality of wires.
An impeder for controlling the magnetic field path in an electric induction welding process, the impeder comprising:
- a rolled sheet of magnetically conductive, high Curie temperature material, the rolled sheet having adjacent surfaces electrically isolated from each other;
- and
- a high temperature enclosure surrounding the rolled sheet.
An impeder for controlling the magnetic field path in an electric induction welding process, the impeder comprising:
- a magnetic material having at least one entry passage formed therethrough for entry flow of a cooling medium;
- and
- a high temperature enclosure surrounding the magnetic material, the magnetic material spaced apart from the interior wall of the enclosure to form at least one exit passage for exit flow of the cooling medium, the enclosure having at least one inlet port and at least one outlet port for injecting the cooling medium into the at least one entry passage and discharging the cooling medium from the at least one exit passage, respectively.
An impeder for controlling the magnetic field path in an electric induction welding process, the impeder comprising:
- a magnetic material;
- a high temperature enclosure surrounding the magnetic material, the magnetic material spaced apart from the interior wall of the enclosure to form a coolant passage around the exterior of the magnetic material, the enclosure having at least one inlet port at the first end of the enclosure and at least one outlet port at the end of the enclosure opposing the first end, the at least one inlet and outlet ports in communication with the coolant passage for injecting a cooling medium into the at least inlet port and discharging the cooling medium from the at least one outlet port, respectively.
A method of electric induction welding to form a product from a stock material, the method comprising the steps of:
- forming an impeder element from a ferrite, a plurality of electrically insulated, magnetically conductive, high Curie temperature solid wires, or a rolled sheet of magnetically conductive, high Curie Temperature material having adjacent surfaces of the rolled sheet electrically isolated from each other;
- surrounding the impeder element with a high temperature enclosure to form an impeder;
- placing the impeder in the vicinity of the weld area for the stock material;
- and
- applying a magnetic field to the weld area to form the product.
Dependencies are inferred from the claim text.