Superconductor induction coil
AssigneeAjax Tocco Magnethermic Corporation
InventorsTheodore E. Burke, Frank Li
Life of this patent
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Abstract
An induction heating apparatus that can operate at current frequencies of greater than 60 Hz and at least 1 kW. The induction heating apparatus includes a high frequency power supply, a superconductive induction coil, and a fluid cooling system. A fluid cooling system is designed to cause a cooling fluid to flow at least partially about and/or through the superconductive induction coil.
Claims36
An induction heating apparatus that can operate at current frequencies of greater than 60 Hz and at at least 1 kW, said induction heating apparatus comprising a high frequency power supply, a superconductive induction coil, a superconductive power cable, and a fluid cooling system;
- said high frequency power supply designed to generate current frequencies of over 60 Hz and to generate at least 1 kW of power, said superconductive power cable connected to said high frequency power supply and said superconductive induction coil to enable power from said high frequency power supply to flow through said superconductive induction coil, said superconductive power cable formed of one or more different materials form said superconductive induction coil and having a different configuration from said superconductive induction coil, said superconductive power cable comprising a core, a high temperature superconductor material positioned at least partially about said core, and an inner cryostat wall spaced from said high temperature superconductor material to form a cooling fluid channel between said inner cryostat wall and said high temperature superconductor material;
- said fluid cooling system designed to cool said superconductive induction coil and said superconductive power cable;
- said superconductive induction coil designed to generate a magnetic induction field when current from said high frequency power supply flows therethrough thereby causing a workpiece in close proximity to said superconductive induction coil to be heated or melted.
An induction heating apparatus that can operate at current frequencies of greater than 60 Hz and at least 1 kW, said induction heating apparatus comprising a high frequency power supply, a superconductive induction coil, a superconductive power cable, and a fluid cooling system;
- said high frequency power supply designed to generate current frequencies of over 60 Hz and to generate at least 1 kW of power, said superconductive poswer cable connected to said high frequency power supply and said superconductive induction coil to enable power from said high frequency power supply to flow through said superconductive induction coil, said superconductive power cable formed of one or more different materials form said superconductive induction coil and having a different configuration from said superconductive induction coil, said superconductive power cable comprising a core, a high temperature superconductor material positioned at least partially about said core, an inner cryostat wall spaced from said high temperature superconductor material to form a cooling fluid channel between said inner cryostat wall and said high temperature superconductor material, outer protective covering, a dielectric material, a HTS shield tape, a shielding layer, a thermo-insulation material, and an outer cryostat wall, said dielectric material positioned at least partially about said high temperature superconductor material, said HTS shield tape positioned at least partially about one or more structures selected from the group consisting of said high temperature superconductor material and said dielectric material, said shielding layer positioned at least partially about one or more structures selected from the group consisting of said high temperature superconductor material and said dielectric material, said thermo-insulation material positioned at least partially about one or more structures selected from the group consisting of said high temperature superconductor material, said dielectric material, said HTS shield tape, said shielding layer and said inner cryostat wall, said outer cryostat wall spaced from said inner cryostat wall, said thermo-insulation material positioned at least partially between said outer cryostat wall and said inner cryostat wall, said shielding layer including a non-magnetic metal or non-magnetic metal alloy, said non-magnetic metal or non-magnetic metal alloy includes one or more metals selected from the group consisting of aluminum, copper, lead, magnesium, nickel, platinum, nickel, silver, and tungsten;
- said fluid cooling system designed to cool said superconductive induction coil and said superconductive power cable;
- said superconductive induction coil designed to generate a magnetic induction field when current from said high frequency power supply flows therethrough thereby causing a workpiece in close proximity to said superconductive induction coil to be heated or melted, said fluid cooling system designed to cause a cooling fluid to flow at least partially through said cooling fluid channel of said superconductive power cable at least partially during a time when said high frequency power supply causes current to flow into said superconductive induction coil, said superconductive induction coil is at least partially positioned in a housing and at least partially immersed in said cooling fluid at least partially during a time when said high frequency power supply causes current to flow into said superconductive induction coil, said high temperature superconductor material including a superconductive wire, said superconductive wire comprising a base metal, a superconductive material, and a top metal, said base metal formed of a non-magnetic metal or non-magnetic metal alloy, said top metal including a noble metal.
Dependencies are inferred from the claim text.