Electrostatic shielding of transformers
AssigneeNew York University
InventorFrancisco De Leon
Life of this patent
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Abstract
Toroidal transformers are currently used only in low-voltage applications. There is no published experience for toroidal transformer design at distribution-level voltages. Toroidal transformers are provided with electrostatic shielding to make possible high voltage applications and withstand the impulse test.
Claims18
A transformer comprising:
- a core comprising a rolled laminate metal forming a plurality of layers including a last layer, each layer including an insulation portion and a metallic portion;
- a high voltage winding disposed about the core;
- a low voltage winding disposed about the core;
- a shorting connection between the high voltage winding and the core.
The transformer of claim 11, wherein the electrical connection is between a first turn of the first winding and an outer layer of the core.
A method of electrostatically shielding a toroidal transformer having a core with concentrically wound a high voltage winding and low voltage winding, comprising:
- electrically connecting the high voltage winding and the core.
A transformer comprising:
- a core having a laminated metal core wound into a coil forming a plurality of layers and forming an aperture and generally defining a toroidal shape;
- the laminated metal core comprises an insulating portion and a metallic portion, such that each of the plurality of layers include an insulation portion and a metallic portion;
- a first winding disposed about the core and comprising a plurality of first winding turns each of which pass through the aperture;
- a second winding disposed about the core and comprising a plurality of second winding turns each of which pass through the aperture;
- an electrical connection between the first winding and the core.
Dependencies are inferred from the claim text.