Nanostructured insulation for electric machines

Patent metadata

Field	Value
Publication number	US-11855501-B2
Application number	US-202218078300-A
Country	US
Kind code	B2
Filing date	Dec 9, 2022
Priority date	Aug 13, 2018
Publication date	Dec 26, 2023
Grant date	Dec 26, 2023

Abstract

An insulating composition having a polymer resin, a nanoclay, and one or more nanofillers. The insulating composition has a thermal conductivity of greater than about 0.8 W/mK, a dielectric constant of less than about 5, a dissipation factor of less than about 3%, and a breakdown strength of greater than about 1,000 V/mil. The insulating composition has an endurance life of at least 400 hours at 310 volts per mil.

First claim

What is claimed is:

1. An insulating composition comprising:
a polymer resin;
a nanoclay; and
one or more nanofillers, the one or more nanofillers including zinc oxide and wherein the composition comprises greater than about 5% zinc oxide by weight.

2. The insulating composition of claim 1 , wherein the polymer resin is one selected from the group consisting of: epoxy resin, silicone rubber, polyester resin, polyimides, polyetherimides, polysulfones, polyether ether keton, polycarbonates, and polyamide-imides.

3. The insulating composition of claim 1 , wherein the nanoclay is one selected from the group consisting of: montmorillonite, kaolin, and talc.

4. The insulating composition of claim 1 , wherein the composition comprises about 5% zinc oxide to about 15% zinc oxide by weight.

5. The insulating composition of claim 4 , wherein the composition comprises about 7% zinc oxide to about 10% zinc oxide by weight.

6. The insulating composition of claim 1 , wherein a combination of the nanoclay and the one or more nanofillers comprises a maximum of about 40% of the insulating composition by weight.

7. A motor comprising,
at least one winding associated with the motor; and
a nanostructured insulating composition applied to the at least one winding, wherein the nanostructured insulating composition comprises:
a polymer resin,
a nanoclay, and
one or more nanofillers, the one or more nanofillers including zinc oxide and wherein the composition comprises greater than about 5% zinc oxide by weight.

8. The motor of claim 7 , wherein the polymer resin is one selected from the group consisting of: epoxy resin, silicone rubber, polyester resin, polyimides, polyetherimides, polysulfones, polyether ether keton, polycarbonates, and polyamide-imides.

9. The motor of claim 7 , wherein the nanoclay is one selected from the group consisting of: montmorillonite, kaolin, and talc.

10. The motor of claim 7 , wherein the composition comprises about 5% zinc oxide to about 15% zinc oxide by weight.

11. The motor of claim 10 , wherein the composition comprises about 7% zinc oxide to about 10% zinc oxide by weight.

12. A device comprising:
a nanostructured insulating composition applied to a portion of the device, wherein the nanostructured insulating composition comprises:
a polymer resin,
a nanoclay, and
one or more nanofillers, the one or more nanofillers including zinc oxide and wherein the composition comprises greater than about 5% zinc oxide by weight.

13. The device of claim 12 , wherein the device is one selected from the group consisting of: a circuit board, a transmission cable, an isolation circuit, and a device housing.

14. The device of claim 12 , wherein the device is one selected from the group consisting of: a transformer, a circuit breaker, and a motor.

15. The device of claim 14 , wherein the motor is one selected from the group consisting of: an induction motor and a permanent magnet motor.

16. The device of claim 12 , wherein the composition comprises about 5% zinc oxide to about 15% zinc oxide by weight.

17. The device of claim 16 , wherein the composition comprises about 7% zinc oxide to about 10% zinc oxide by weight.

18. The device of claim 12 , wherein the polymer resin is one selected from the group consisting of: epoxy resin, silicone rubber, polyester resin, polyimides, polyetherimides, polysulfones, polyether ether keton, polycarbonates, and polyamide-imides.

19. The device of claim 12 , wherein the nanoclay is one selected from the group consisting of: montmorillonite, kaolin, and talc.

20. The device of claim 12 , wherein a combination of the nanoclay and the one or more nanofillers comprises a maximum of about 40% of the insulating composition by weight.

Assignees

• Univ Connecticut

Inventors

• Cao Yang

Classifications

• H02K3/30 Primary

  Windings characterised by the insulating material · CPC title

• H02K3/50

  Fastening of winding heads, equalising connectors, or connections thereto · CPC title

• H02K15/105

  to the windings · CPC title

• H02K15/12

  Impregnating, moulding insulation, heating or drying of windings, stators, rotors or machines · CPC title

• H01B3/12

  ceramics · CPC title