Coil for a rotating electrical machine

Patent metadata

Field	Value
Publication number	US-9379587-B2
Application number	US-79868310-A
Country	US
Kind code	B2
Filing date	Apr 9, 2010
Priority date	Apr 9, 2009
Publication date	Jun 28, 2016
Grant date	Jun 28, 2016

Abstract

A gas treatment machine includes a main gas treatment circuit, connected to a gas compression chamber, a gas compressor, mounted in the compression chamber, a rotating electrical machine, for driving the gas compressor, including at least one coil for the flow of electric current for generating a magnetic flux, and a secondary cooling circuit, transporting gas from the compression chamber to the rotating electrical machine, for cooling this rotating electrical machine. The coil includes at least one toroidal core formed from a rolling of a plurality of turns ( 20 ) each consisting of at least one conductor ( 22 ) insulated over the length thereof by a primary insulator ( 24 ), the rolling which forms the toroidal core in turn being covered with a secondary insulator ( 26 ), the primary insulator ( 24 ) and the secondary insulator ( 26 ) including PolyEtherEtherKetone.

First claim

What is claimed is:

1. A gas treatment machine, comprising:
a gas compression chamber;
a main gas treatment circuit connected to the gas compression chamber, the main gas treatment circuit having a main inlet into the gas compression chamber, and a main outlet from the gas compression chamber;
a gas compressor mounted in the compression chamber; and
a rotating electrical machine for driving the gas compressor, the rotating electrical machine including a stator comprising a plurality of coils,
each coil being formed from a stack of plates and comprising end windings an each including an elbow connecting two straight portions of the coil each straight portion extending in a slot and each coil (i) being formed of a plurality of adjacent insulated turns of an insulated single conductor, each insulated turn of the insulated single conductor being insulated by an external insulating coating forming a primary insulator, and (ii) forming a single toroidal loop from the plurality of adjacent insulated turns, the single toroidal loop being insulated over the plurality of adjacent insulated turns with a secondary insulator, the primary and secondary insulators being formed of PolyEtherEtherKetone, wherein the coils are angularly offset and received in each slot.

2. The gas treatment machine according to claim 1 , wherein at least one of the primary insulator and the secondary insulator consists of a PolyEtherEtherKetone matrix incorporating mica inclusions.

3. The gas treatment machine according to claim 1 , wherein the primary insulator and the secondary insulator consist purely of PolyEtherEtherKetone.

4. The gas treatment machine according to claim 1 , wherein the primary insulator has a thickness of between 0.1 mm and 0.5 mm.

5. The gas treatment machine according to claim 1 , wherein the secondary insulator has a thickness of between 0.5 mm and 5 mm.

6. The gas treatment machine according to claim 4 , wherein the secondary insulator has a thickness of between 0.5 mm and 5 mm.

7. The gas treatment machine according to claim 1 , wherein the at least one coil is impregnated with an organic resin.

8. The gas treatment machine according to claim 7 , wherein the organic resin is an epoxy or polyester-imide resin.

9. The gas treatment machine according to claim 1 , further comprising a housing for the rotating electrical machine, said housing being connected to the compression chamber.

10. A gas treatment machine, comprising:
a gas compression chamber;
a main gas treatment circuit connected to the gas compression chamber, the main gas treatment circuit having a main inlet into the gas compression chamber, and a main outlet from the gas compression chamber;
a gas compressor mounted in the compression chamber; and
a rotating electrical machine for driving the gas compressor, the rotating electrical machine comprising a stator including
at least one coil being angularly offset and being formed from a stack of plates and comprising end windings each including an elbow connecting two straight portions of the coil each straight portion extending in a slot, and each coil (i) being formed of a plurality of adjacent insulated turns of insulated single conductor, each insulated turn of the insulated single conductor being insulated by an external insulating coating forming a primary insulator formed from a wrapping with a partial covering by a strip of a material containing PolyEtherEtherKetone, and (ii) forming a single toroidal loop from the plurality of adjacent insulated turns, the single toroidal loop being insulated over the plurality of adjacent insulated turns with a secondary insulator formed of PolyEtherEtherKetone.

Assignees

• Durantay Lionel
• Ge Energy Power Conversion Technology Ltd

Inventors

• Durantay Lionel

Classifications

• H02K9/005

  Electricity · mapped topic

• H02K3/30 Primary

  Windings characterised by the insulating material · CPC title

• H02K15/105

  to the windings · CPC title

• Y10T29/49009

  Dynamoelectric machine · CPC title

• H02K3/24

  with channels or ducts for cooling medium between the conductors · CPC title