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US 9,111,677 B2Granted
Method of manufacturing a dry-type open wound transformer having disc windings
AssigneeABB Technology AG
InventorsCharlie Sarver, William E. Pauley, Jr.
Life of this patent
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Abstract
Method of manufacturing a dry-type open wound transformer having disc windings is provided. The transformer has one or more high voltage windings, each of which includes a plurality serially connected discs. Each disc has two or more sections, wherein the sections are separated from each other by spaces arranged in a circumferential configuration.
Claims16
A method of manufacturing a dry, open wound power distribution transformer comprising:
- (a.) providing a ferromagnetic core;
- (b.) providing a cylindrical insulation barrier having a plurality of circumferentially spaced and radially-extending comb structures, each comb structure comprising a plurality of teeth, wherein the teeth of the comb structures form a series of gap rings arranged along an axial length of the insulation barrier, each of the gap rings comprising a series of circumferentially arranged gaps;
- (c.) forming a winding over the insulation barrier, the winding comprising a plurality of serially connected discs arranged in an axial direction of the winding, wherein the forming of the winding comprises forming each disc by:
- winding a conductor and an insulating strip around the insulation barrier, inside one of the gap rings, to form a radially-inner section of the disc comprising a plurality of concentric and alternating layers of the insulating strip and the conductor, wherein each pair of adjacent layers in the radially-inner section are in contact with each other;
- disposing a plurality of spacers around the circumference of the radially-inner section;
- and
- winding the conductor and the insulating strip around the spacers to form a radially-outer section of the disc comprising a plurality of concentric and alternating layers of the insulating strip and the conductor, wherein each pair of adjacent layers in the radially-outer section are in contact with each other, and wherein the radially-outer section is separated from the radially-inner section by a plurality of spaces arranged in a circumferential configuration;
- d.) applying an insulating varnish to the winding;
- and
- e.) mounting the winding to the ferromagnetic core.
7 more elements
A method of manufacturing a dry, open wound power distribution transformer comprising:
- (a.) providing a ferromagnetic core;
- (b.) providing a cylindrical insulation barrier having a plurality of circumferentially spaced and radially-extending comb structures, each comb structure comprising a plurality of teeth, wherein the teeth of the comb structures form a series of gap rings arranged along an axial length of the insulation barrier, each of the gap rings comprising a series of circumferentially arranged gaps;
- (c.) forming a winding over the insulation barrier, the winding comprising a plurality of serially connected discs arranged in an axial direction of the winding, wherein the forming of the winding comprises forming each disc by:
- winding a conductor and an insulating strip around the insulation barrier, inside one of the gap rings, to form a radially-inner section of the disc comprising a plurality of concentric and alternating layers of the insulating strip and the conductor, wherein each pair of adjacent layers in the radially-inner section are in contact with each other;
- disposing a plurality of spacers around the circumference of the radially-inner section and wherein each spacer extends between a pair of the teeth;
- and
- winding the conductor and the insulating strip around the spacers to form a radially-outer section of the disc comprising a plurality of concentric and alternating layers of the insulating strip and the conductor, wherein each pair of adjacent layers in the radially-outer section are in contact with each other, and wherein the radially-outer section is separated from the radially-inner section by a plurality of spaces arranged in a circumferential configuration;
- d.) applying an insulating varnish to the winding;
- and
- e.) mounting the winding to the ferromagnetic core.
7 more elements
A method of manufacturing a dry, open wound power distribution transformer comprising:
- (a.) providing a ferromagnetic core;
- (b.) providing a cylindrical insulation barrier having a plurality of circumferentially spaced and radially-extending comb structures, each comb structure comprising a plurality of teeth, wherein the teeth of the comb structures form a series of gap rings arranged along an axial length of the insulation barrier, each of the gap rings comprising a series of circumferentially arranged gaps;
- (c.) forming a winding over the insulation barrier, the winding comprising a plurality of serially connected discs arranged in an axial direction of the winding, wherein the forming of the winding comprises forming each disc by:
- winding a conductor and an insulating strip around the insulation barrier, inside one of the gap rings, to form a radially-inner section of the disc comprising a plurality of concentric and alternating layers of the insulating strip and the conductor, wherein each pair of adjacent layers in the radially-inner section are in contact with each other;
- disposing a plurality of spacers around the circumference of the radially-inner section and wherein the spacers are located between the comb structures;
- and
- winding the conductor and the insulating strip around the spacers to form a radially-outer section of the disc comprising a plurality of concentric and alternating layers of the insulating strip and the conductor, wherein each pair of adjacent layers in the radially-outer section are in contact with each other, and wherein the radially-outer section is separated from the radially-inner section by a plurality of spaces arranged in a circumferential configuration;
- d.) applying an insulating varnish to the winding;
- and
- e.) mounting the winding to the ferromagnetic core.
7 more elements
Dependencies are inferred from the claim text.