Arrangement of conducting bar ends
View Patent ↗An arrangement includes conducting bar ends connected together and a cap) covering them filled with a putty. The cap is made of a resin containing a high thermal conductivity filler. The putty is a silicone elastomer containing a high thermal conductivity filler.
1. An arrangement of conducting bar ends connected together, the conducting bar ends comprising lugs connected together with a cap, the cap being filled with a putty, which has a thermal conductivity greater than 1 W/mK, and covering the conducting bar ends to discharge heat from the lugs to outside the arrangement, wherein:
the cap is comprised of a resin containing a high thermal conductivity filler, and the putty is a silicone elastomer containing a high thermal conductivity filler composed of at least one of boron nitride, alumina and combinations thereof.
2. The arrangement as claimed in claim 1 , wherein the cap covers the reciprocally connected lugs.
3. The arrangement as claimed in claim 1 , wherein the silicone elastomer is an addition curing two-part silicone rubber that vulcanizes at room temperature.
4. The arrangement as claimed in claim 3 , wherein the two-part silicone rubber is Polydimethylsiloxane with functional groups and auxiliaries for addition cross-linking and Polydimethylsiloxane with hydrogen groups.
5. The arrangement as claimed in claim 1 , wherein the filler amount within the silicone elastomer is less than 45 wt %.
6. The arrangement as claimed in claim 1 , wherein the filler amount within the silicone elastomer is 36-43 wt %.
7. The arrangement as claimed in claim 1 , wherein the resin of the cap includes a reinforcing structure.
8. The arrangement as claimed in claim 1 , wherein the conducting bar is a stator bar of a rotating electric machine.
9. A cap for an electric machine, the cap being filled with a putty, the cap being comprised of a resin which contains a high thermal conductivity filler, and the putty having a thermal conductivity greater than 1 W/mK.
10. The cap according to claim 9 , wherein the high thermal conductivity filler is boron nitride, alumina, or combinations thereof.
11. The cap according to claim 9 , further comprising a reinforcing structure.
12. The cap according to claim 11 , wherein the reinforcing structure together with the resin define a composite material.
13. The cap according to claim 9 , wherein the composite material is fiberglass embedded into a resin matrix.