Thermal Epoxy to glue Magnets

I am using Statorade + Hubsinks on a 23 pole pair motor with flat (non-curved) magnets.
Has anybody experience with thermal epoxies which are okay up to 150 degrees Celsius?

I am not sure by how much it would improve overall heat transfer from stator to shell. Does anybody have values (in W/mK) for heat transfer of Statorade from the stator to the magnets?

Good question! I doubt that statorade has been measured in W/mK, Justin has probably saved many hubs from overheating by popularizing stator cooling fluid, here are some related info:

Mercury 8.4
Hydrofluoric acid 2.33
Water, Fresh 0.609
Alcohol 0.204
Transformer oil 0.177
Oil, cylinder 0.152
Engine Oil 0.145
air 0.025
Copper : 400
Alumium : 200



quote:

the thermal conductivity coefficients for 5 Fe3O4‐S and 20 Fe3O4‐S ferrofluid also increased for ΔT = 35 K. At the highest magnetic field, the thermal conductivity coefficient, k, is measured as 0.51 and 0.47 W/mK for 20 and 5 vol%, respectively.

Click to expand...

Another research saysthat ferrofluid designed for thermal transfer is about 20% more efficient than transformer oil. https://www.researchgate.net/public...ristics_of_a_Transformer_Oil_Based_Ferrofluid
Another science thesis for ferrofluid cooling gave 2.05 W/mk for Ferrofluid compared to 1.77 for transformer oil.

Does the iron just stick to the neodynium magnets? does it bounce around between the coils and the magnets? does the iron jump from the side of the coils to the neodynium? Does the iron bounce from one coil to the other as the magnetic field changes? I think a lot will glue to the magnets. What do you think?

transformer oil is also used for datacenters so it's pretty gentle to the epoxy and glue in the stator apparently.https://www.researchgate.net/public...rations_for_Oil_Immersion-Cooled_Data_Centers

The most accurate thing is to do a test with a thermal camera on three motors with air/oil/statorade, and see which goes red the fastest.

If you decide that machine oil is 5 times more performant than air, and 80% as good as Ferrofluid, then you have to get low viscosity oils... 0w8 is for hybrid toyotas, but it's pretty viscous still... sewing machine oil in the industry is used for light machine parts... viscous oil will reduce your range. You need sewing machine oil which protects from rust and doesn't turn acidic over time.

Either way, if you want to have green/blue/violet transformer oil in the engine it's the coolest. https://www.ebay.fr/itm/152675837549?hash=item238c30666d:g:cYcAAOSw5cNYQHLv