INTERLEAVED TRANSFORMER WINDING HAVING THREE PARALLEL CONNECTED CONDUCTORS

• US 3,766,504 A
• Filed: 11/10/1972
• Issued: 10/16/1973
• Est. Priority Date: 11/10/1972
• Status: Expired due to Term

• Current Assignee: ABB Power T&D Limited (ABB Limited)
• Original Assignee: Dean A. Yannucci, Robert I Van Nice
• Inventors: Van Nice, Robert I., Yannucci, Dean A.
• Primary Examiner(s): Kozma, Thomas J.
• Application Number:
  US05/305,387
• Time in Patent Office: 340 Days
• Field of Search: 336/186,187,69,70
• US Class Current: 336/70
• CPC Class Codes: H01F 27/343 Preventing or reducing surge voltages; oscillations

Abstract

A disc-type interleaved winding for transformers. Current is conducted through the winding by three conductors connected in parallel and interconnected between the coil discs to provide three different conduction paths. The first and third conduction paths are transposed between adjacent coil discs and progress in radially opposite directions through adjacent coil discs. The second conduction path forms a looping pattern throughout the winding with the conductor forming the second conduction path physically positioned between the other two conductors in each coil disc.

Claims

1. A winding for electrical inductive apparatus, comprising:

at least, first, second, third and fourth coil discs, said second coil disc being axially positioned between said first and third coil discs, said third coil disc being axially positioned between said second and fourth coil discs;

first, second and third electrical conductors forming first, second and third conduction paths through said coil discs;

said first and third conduction paths progressing in a first direction through said first coil disc, in a second direction through said second coil disc, in the first direction through said third coil disc, and in the second direction through said fourth coil disc, said first and second directions being opposite each other; and

said second conduction path beginning in second coil disc and progressing in the second direction through said second coil disc, in the first direction through said first coil disc, in the second direction through said fourth coil disc, and in the first direction through said third coil disc, respectively.

2. The winding of claim 1, wherein the second conductor is positioned between the first and third conductors throughout each of said coil discs.

3. The winding of claim 1, wherein the first and third conductors are transposed between each coIl disc.

4. The winding of claim 1, wherein the second conductor is covered with an insulation structure having a higher voltage breakdown strength than that of insulation covering the first and third conductors.

5. A winding for electrical inductive apparatus, comprising:

at least, first, second, third and fourth coil discs having first and second conductor-turns, said second coil disc being axially positioned between said first and third coil discs, said third coil disc being axially positioned between said second and fourth coil discs;

first, second and third electrical conductors forming first, second and third conduction paths through said coil discs;

said first and third conduction paths beginning at the first conductor-turn of said first coil disc and progressing to the second conductor-turn of said first coil disc, to the second conductor-turn of said second coil disc, to the first conductor-turn of said second coil disc, to the first conductor-turn of said third coil disc, to the second conductor-turn of said third coil disc, to the second conductor-turn of said fourth coil disc, and to the first conductor-turn of said fourth coil disc; and

said second conduction path beginning at the second conductor-turn of said second coil disc and progressing to the first conductor-turn of said second coil disc, to the first conductor-turn of said first coil disc, to the second conductor-turn of said first coil disc, to the second conductor-turn of said fourth coil disc, to the first conductor-turn of said fourth coil disc, to the first conductor-turn of said third coil disc, and to the second conductor-turn of said third coil disc.

6. The winding of claim 5, wherein the second conductor is radially positioned between the first and third conductors in every conductor-turn.

7. The winding of claim 5, wherein the first and third conductors are transposed between each coil disc.

8. The winding of claim 5, wherein the second conductor is covered with an insulation structure having a higher voltage breakdown strength than that of insulation covering the first and third conductors.

9. A winding for electrical inductive apparatus, comprising;

at least, first, second, third and fourth coil discs, said second disc being axially positioned between said first and third coil discs, said third coil disc being axially positioned between said second and fourth coil discs;

first, second and third conductors each comprising at least one electrical strand, said second conductor being radially disposed over said first conductor and said third conductor being radially disposed over said second conductor, said first, second and third conductors being collectively and spirally disposed through each of said coil discs to form at least first and second conductor-turns, the first conductor-turn of each coil disc being located at substantially the same radial position in said winding, said conductors being electrically connected between conductor-turns to provide first, second and third conduction paths;

said first conduction path beginning at the first conductor of the first conductor-turn of said first coil disc and progressing to the first conductor of the second conductor-turn of said first coil disc, to the third conductor of the second conductor-turn of said second coil disc, to the third conductor of the first conductor-turn of said second coil disc, to the first conductor of the first conductor-turn of said third coil disc, to the first conductor of the second conductor-turn of said third coil disc, to the third conductor of the second conductor-turn of said fourth coil disc, and to the third conductor of the first conductor-turn of said fourth coil disc;

said second conduction path beginning at the second conductor of the second conductor-turn of said second coil disc and progressing to the second conductor of the first conductor-turn of said second coil disc, to the second conductor of the first conductor-turn of said first coil disc, to the second conductor of the second conductor-turn of said first coil disc, to the second conductor of the second conductor-turn of said fourth coil disc, to the second conductor of the first conductor-turn of said fourth coil disc, to the second conductor of the first conductor-turn of said third coil disc, and to the second conductor of the second conductor-turn of said third coil disc; and

said third conduction path beginning at the third conductor of the first conductor-turn of said first coil disc and progressing to the third conductor of the second conductor-turn of said first coil disc, to the first conductor of the second conductor-turn of said second coil disc, to the first conductor of the first conductor-turn of said second coil disc, to the third conductor of the first conductor-turn of said third coil disc, to the third conductor of the second conductor-turn of said third coil disc, to the first conductor of the second conductor-turn of said fourth coil disc, and to the first conductor of the first conductor-turn of said fourth coil disc.