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US 2006/0125593 A1Published application
Two part transformer core, transformer and method of manufacture
AssigneeThe Delta Group
InventorAndrew Piaskowski
Life of this patent
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Abstract
A toroidal transformer core topology having improved thermal and electrical properties has a two part core, one part concentrically disposed within the other, with the windings wound between the two. Less expensive materials and less material can be used to construct the core. The core can be constructed using inexpensive and efficient methods.
Claims22
A transformer comprising:
- a two-part core composed of a magnetic material, including a toroidal piece having an inner wall, and an outer wall, and a shell piece having an inner wall and an outer wall, the toroidal piece being concentrically disposed within the shell piece;
- and
- at least two windings disposed in a space formed between the outer wall of the toroidal piece, and the inner wall of the shell piece.
A two-part core for a transformer, the two part core comprising:
- a toroidal piece composed of a magnetic material having an inner wall and an outer wall;
- a shell piece of magnetic material having an inner wall an outer wall;
- and
- an annular space defined between the toroidal piece concentrically disposed within the shell piece for housing windings, the inner wall of the toroidal piece and the outer wall of the shell piece providing radial dissipation of heat produced in the two-part core by electrical current applied to the windings.
1 more element
A method of manufacturing of toroidal transformer, comprising:
- winding a strip of magnetic material around a spindle to form a toroidal piece having an inner wall and an outer wall;
- heat annealing the toroidal piece and removing a sector therefrom;
- applying a layer of insulation to the outer wall of the toroidal piece;
- winding a first winding over the insulation on the toroidal piece;
- applying a layer of insulation over the first winding;
- winding a second winding over the insulation applied to the primary winding;
- applying a layer of insulation of the second winding;
- winding a strip of magnetic material over the insulation applied to the second winding to form a shell piece having an inner wall contacting the insulation applied to the secondary winding and an outer wall;
- and
- heat annealing the shell piece and removing a sector therefrom.
7 more elements
Dependencies are inferred from the claim text.