Wrapped stator coil for use in a generator

Patent metadata

Field	Value
Publication number	US-9502938-B2
Application number	US-201414255990-A
Country	US
Kind code	B2
Filing date	Apr 18, 2014
Priority date	Apr 18, 2014
Publication date	Nov 22, 2016
Grant date	Nov 22, 2016

Abstract

A wrapped stator coil for use in a generator is provided comprising: an electrical conductor coil; an insulating layer structure disposed about the electrical conductor coil; an interwoven layer structure disposed about the insulating layer structure and comprising insulating material and a first conductive material; and a conductive layer structure disposed about the interwoven layer structure and comprising a second conductive material.

First claim

What is claimed is:

1. A wrapped stator coil for use in a generator comprising:
an electrical conductor coil;
an insulating layer structure disposed about the electrical conductor coil;
an interwoven layer structure disposed about the insulating layer structure and comprising insulating material and a first conductive material; and
a conductive layer structure disposed about the interwoven layer structure and comprising a second conductive material,
wherein the second conductive material has a lower resistance than the first conductive material.

2. The wrapped stator coil as set out in claim 1 , wherein the insulating layer structure comprises multiple layers of a glass backed mica paper tape.

3. The wrapped stator coil as set out in claim 1 , wherein the insulating material of the interwoven layer structure comprises glass backed mica paper tape.

4. The wrapped stator coil as set out in claim 3 , wherein the first conductive material comprises an electrically conductive tape comprising glass reinforcement fibers.

5. The wrapped stator coil as set out in claim 3 , wherein the first conductive material comprises a conductive glass tape.

6. The wrapped stator coil as set out in claim 5 , wherein the mica paper tape is wound once for every one wind of the conductive glass tape.

7. The wrapped stator coil as set out in claim 5 , wherein the mica paper tape and the conductive glass tape are wound in an overlapping manner.

8. A method for forming a wrapped stator coil comprising:
providing an electrical conductor coil;
forming an insulating layer structure about the electrical conductor coil;
wrapping an insulating material and a first conductive material in an interwoven manner about the insulating layer structure to define an interwoven layer structure; and
wrapping a second conductive material about the interwoven layer structure,
wherein the second conductive material has a lower resistance than the first conductive material.

9. The method as set out in claim 8 , wherein the insulating layer structure comprises multiple layers of a glass backed mica paper tape.

10. The method as set out in claim 8 , wherein the insulating material of the interwoven layer structure comprises glass backed mica paper tape.

11. The method as set out in claim 10 , wherein the first conductive material comprises a conductive glass tape.

12. The method as set out in claim 11 , wherein wrapping an insulating material and a first conductive material comprises winding the mica paper tape and the conductive glass tape concurrently in an overlapping manner.

13. The method as set out in claim 12 , wherein the mica paper tape is wound once for every one wind of the conductive glass tape.

Assignees

• Siemens Energy Inc

Inventors

• Emery Franklin T

Classifications

• H02K3/40

  for high voltage, e.g. affording protection against corona discharges · CPC title

• H02K3/30 Primary

  Windings characterised by the insulating material · CPC title