Back to results
US 2006/0097600 A1Published application
Device for improving the protection of a construction unit against electrical corona discharges
AssigneeALSTOM Technology Ltd
InventorThomas Baumann
Life of this patent
Estimating the term…
Abstract
A device for improving the protection of a component against surface discharges includes a non-woven substrate made of fibers and configured to be electrically insulating and a coating containing silicon carbide (SiC) disposed on the substrate.
Claims19
1-14. (canceled)
15:
- A device for improving the protection of a component against electrical corona discharges, the device comprising:
- a non-woven substrate made of fibers and configured to be electrically insulating;
- and
- a coating containing silicon carbide (SiC) disposed on the substrate.
1 more element
16:
- The device as recited in claim 15, wherein the device is an overhang corona protection device.
17:
- The device as recited in claim 15, wherein the coating includes one of a curable varnish and a cured varnish and wherein the silicon carbide is in the form of at least one of SiC crystals and SiC grains.
18:
- The device as recited in claim 17, wherein the varnish is cured on the substrate.
19:
- The device as recited in claim 17, wherein the substrate is disposed on the component and the varnish is uncured.
20:
- The device as recited in claim 15, wherein the substrate is a non-woven.
21:
- The device as recited in claim 15, wherein the substrate has a weight of less than 100 g/m2.
22:
- The device as recited in claim 15, wherein the substrate includes polyester fibers.
23:
- The device as recited in claim 15, wherein the substrate includes a binder holding the fibers together.
24:
- The device as recited in claim 15, wherein the device is an overhang corona protection tape.
25:
- The device as recited in claim 15, wherein the fibers have a preferred orientation.
26:
- The device as recited in claim 25, wherein the preferred orientation of the fibers aligned with a machine direction.
27:
- An electric machine comprising:
- a rotor;
- a stator;
- and
- an overhang corona protection device covering a portion of at least one of the rotor and the stator, wherein the protection device includes a non-woven substrate made of fibers and configured to be electrically insulating, and a coating containing silicon carbide (SiC) disposed on the substrate.
2 more elements
28:
- The electrical machine as recited in claim 27, wherein the electrical machine is at least one of an electrical motor and a generator.
29:
- A method for fastening an overhang corona protection device onto an overhang part of a conductor of a stator of an electric machine, the method comprising:
- providing a non-woven electrically insulating substrate made of fibers in the form of a tape;
- impregnating the substrate with a varnish containing SiC grains so as to form a coating on the substrate;
- winding the overhang corona protection tape onto the overhang part;
- and
- curing the varnish.
3 more elements
30:
- The method as recited in claim 29, wherein the curing is performed before the winding.
31:
- The method as recited in claim 30, wherein the curing is performed immediately after the impregnating.
32:
- The method as recited in claim 29, wherein the curing is performed after the winding.