Insulation system, insulant, and insulation material for producing the insulation system
Various embodiments include an insulation material for an electrical rotating machine comprising: a curable matrix material; a curing agent; and a filler embedded in the matrix material. The filler comprises electrically conductive doped metal oxide particles.
1. An insulation material for an electrical rotating machine, the material comprising:
a curable matrix material;
a curing agent operable to set the curable matrix material; and
a filler embedded in the matrix material;
wherein the filler comprises electrically conductive n-doped metal oxide particles including at least one metal oxide in binary and tertiary mixed phase; and
wherein the particles are doped with at least two elements selected from the group consisting of: fluorine, chlorine, phosphorus, and sulfur.
2. The insulation material as claimed in claim 1 , wherein a concentration of the particles in the filler exceeds a respective percolation threshold.
3. The insulation material as claimed in claim 1 , wherein the particles have an aspect ratio of 10 or higher.
4. The insulation material as claimed in claim 1 , further comprising a second filler comprising electrically conductive doped metal oxide particles embedded in the curable matrix material.
5. The insulation material as claimed in claim 1 , further comprising a second filler comprising electrically conductive doped metal oxide particles embedded in the curable matrix material;
wherein the particles of the second filler have a different form in comparison to particles of the first filler.
6. The insulation material as claimed in claim 1 , wherein the particles comprise spheres.
7. The insulation material as claimed in claim 1 , further comprising a second filler comprising electrically conductive doped metal oxide particles embedded in the curable matrix material;
wherein the particles of the second filler have different dimensions in comparison to particles of the first filler.
8. The insulation material as claimed in claim 1 , wherein the particles have a nanoscale dimension.
9. The insulation material as claimed in claim 1 , wherein the particles have a microscale dimension.
10. The insulation material as claimed in claim 1 , wherein the particles comprise solid material.
11. An insulation system comprising:
a main insulation;
an outer corona shielding; and
an overhang corona shielding;
wherein the outer corona shielding includes an insulation material for an electrical rotating machine, the insulation material comprising:
a cured matrix material; and
a filler embedded in the matrix material;
wherein the filler comprises electrically conductive n-doped metal oxide particles including at least one metal oxide in binary and tertiary mixed phase;
wherein the particles are doped with at least two elements selected from the group consisting of: fluorine, chlorine, phosphorus, and sulfur.