Spacer tape, method for manufacturing a winding and winding

Patent metadata

Field	Value
Publication number	US-12512259-B2
Application number	US-202217928563-A
Country	US
Kind code	B2
Filing date	Jan 7, 2022
Priority date	Jan 11, 2021
Publication date	Dec 30, 2025
Grant date	Dec 30, 2025

Abstract

A spacer tape is provided for spacing apart turns of a winding, which comprises a tape having an upper surface, a lower surface and a longitudinal axis, wherein the lower surface is adhesable and configured to be adhered to a conductor forming a turn of the winding, and spacers with an upper surface and a lower surface arranged on the tape, wherein the lower surface of the spacers is adhered to the upper surface of the tape, and wherein the upper surface of the spacers are adhesable and configured to be adhered to the conductor forming an adjacent turn of the winding.

First claim

The invention claimed is:

1 . A spacer tape for spacing apart turns of a winding comprising,
a tape having an upper surface, a lower surface and a longitudinal axis,
wherein the lower surface is adhesable and configured to be adhered to a conductor forming a turn of the winding, and
spacers with an upper surface and a lower surface arranged on the tape,
wherein the lower surface of the spacers is adhered to the upper surface of the tape,
wherein the upper surface of the spacers are adhesable and configured to be adhered to the conductor forming an adjacent turn of the winding, wherein the spacers comprise a bonding element at the upper surface and the lower surface, and wherein the dimension of the bonding elements in a direction perpendicular to the longitudinal axis is larger than the dimension of the tape.

2 . The spacer tape according to claim 1 ,
wherein the spacers are arranged on the tape equidistantly along the longitudinal axis.

3 . The spacer tape according to claim 1 ,
wherein the spacers comprise materials based on cellulose fiber or materials based on a polymer.

4 . The spacer tape according to claim 1 ,
wherein the bonding elements comprise a polymer.

5 . The spacer tape according to claim 1 ,
wherein the bonding elements comprise a reinforcement material.

6 . The spacer tape according to claim 1 ,
wherein the bonding elements have a distance of at least 1 mm to the edge of the spacers.

7 . The spacer tape according to claim 1 , wherein the upper surface of the tape is adhesable, and
wherein the spacers are adhered to the tape by the adhesable upper surface of the tape, or wherein the spacers are adhered to the tape by an adhesive applied to the lower surface of the spacers.

8 . The spacer tape according to claim 1 ,
wherein the spacers comprise an UV curable adhesive film.

9 . The spacer tape according to claim 1 ,
wherein a removable protective layer is arranged on the upper surface of the spacers.

10 . A method for manufacturing a winding comprising the following steps:
arranging a spacer tape according to claim 1 on a conductor such that an adhesable lower surface of the tape is adhered to the conductor; winding of the conductor forming turns of the winding such that spacers are arranged in between adjacent turns of the winding and are adhered to the adjacent turn of the winding.

11 . The method for manufacturing a winding according to claim 10 comprising the additional following steps:
thermal curing of the winding such that the spacers bond to the adjacent turns.

12 . A winding comprising,
a conductor forming at least two adjacent turns of the winding, a spacer tape according to claim 1 , wherein the spacer tape is arranged in between the adjacent turns such that the spacer tape is adhered to both adjacent turns.

13 . A winding according to claim 12 ,
wherein the spacer tape is bonded to both adjacent turns.

14 . The winding according to claim 12 ,
wherein the spacers are arranged on the tape equidistantly along the longitudinal axis.

15 . The winding according to claim 12 ,
wherein the spacers comprise materials based on cellulose fiber or materials based on a polymer.

16 . The winding according to claim 12 ,
wherein the bonding elements comprise one of a polymer and a reinforcement material.

17 . The winding according to claim 12 ,
wherein the bonding elements have a distance of at least 1 mm to the edge of the spacers.

18 . The winding according to claim 12 , wherein the upper surface of the tape is adhesable, and wherein the spacers are adhered to the tape by the adhesable upper surface of the tape, or wherein the spacers are adhered to the tape by an adhesive-applied to the lower surface of the spacers.

19 . The winding according to claim 12 ,
wherein the spacers comprise an UV curable adhesive film.

20 . The winding according to claim 12 ,
wherein a removable protective layer is arranged on the upper surface of the spacers.

Assignees

• Hitachi Energy Ltd

Inventors

• Bustreo Gianluca
• Perin Martina
• Pavanello Paolo
• Valori Valentina
• Forslin Julia
• Jovalekic Mark
• Girlanda Orlando
• Platek Robert

Classifications

• H01F41/122

  Insulating between turns or between winding layers · CPC title

• C09J2401/00

  Presence of cellulose · CPC title

• C09J2203/326

  for bonding electronic components such as wafers, chips or semiconductors · CPC title

• C09J2301/204

  the adhesive coating being discontinuous · CPC title

• C09J2301/124

  the adhesive layer being present on both sides of the carrier, e.g. double-sided adhesive tape · CPC title