HiModel 4s-8s 200 amp esc

[ozzie-crawl]

usally to water proof the esc some form of conformal coating is used.
what i use comes in a spray can, i give it a few coates and let dry in the sun for acouple of hours, then take it out of the sun for about 1 hour this lets it harden. then i sand the conformal coating of the top of the fets and add the cooling plate

[Brushless55]

I'm on my way to try out some auto vacum line since they are two blocks away and use it on my CAT UL-1 for the all black hardware look

[Alfa Spirit]

This is a neoprene tube for gasoline very strong and nice looking, 3mm inside and 6mm outside

http://www.ovaservices.com/_moteur_thermique_durite_essence0.htm

[Brushless55]

you could use vacum line from an auto parts store

[NativePaul]

Where do you get the black cooling tube Alpha?

[Alfa Spirit]

I made water cooling on my HiModel GX 200 using a 3M Thermally conductive tape

3M Thermally conductive

This 3M product looks fine. What is the best way to waterproof my ESC ? Thanks

[Jeff Wohlt]

Very true. Hereis the make up of 270

http://multimedia.3m.com/mws/mediawebserver?66666UuZjcFSLXTtnxfcOX46EVuQEcuZgVs6EVs6E666666--

It is certainly better to use something made for these components.

[questtek]

I tried to skim through all the pages and still wondering if you could waterproof with liquid electrical tape. It's not conductive. What's your thoughts about this?

I would think twice about using liquid electrical tape. The purpose is to provide insulation. It does a great job with electrical insulation. Thermal properties may be a different story. If I were to design a product like liquid electrical tape I would wat it to have good thermal isolation properties also. Remember, copper wires(or any wire for that matter) heats up when current passes thru them so for this application thermal insulation would be a design feature plus.

You could do some tests on it, but the recommendation to use a 2-part epoxy that was designed specifically for electrical isolation but good thermal conductivity is what I would stick with. Rubber based products like bed insulator materal would also probably have poor thermal conductiity.

[Jeff Wohlt]

Yes but it has little particles in it...sand or soemthing but it would be nice to be able to drop a brick on it and have it still run

[rockwerks]

That stuff should work fine. The problem I see is will will hold heat in.

Still should be fine the epxoy 270 is about the same...anything on them will hold some heat in but keeping fets cool is the key.

I even thought of just spray undercoating in the auto section but not sure the stuff will eat anything without testing on something first.

spray on truck bed liner

[Jeff Wohlt]

That stuff should work fine. The problem I see is will will hold heat in.

Still should be fine the epxoy 270 is about the same...anything on them will hold some heat in but keeping fets cool is the key.

I even thought of just spray undercoating in the auto section but not sure the stuff will eat anything without testing on something first.

[BakedMopar]

I tried to skim through all the pages and still wondering if you could waterproof with liquid electrical tape. It's not conductive. What's your thoughts about this?

[questtek]

which epoxy? what brand?

You can see the pics attached. The cure time is about 24 hrs room temp but you can boost it to just an hour or two if you elevate the temp. I provide more details in my thread on ESC cooling in the FE questions and answers forum.

[rockwerks]

I found the two-part thermal epoxy to work great

which epoxy? what brand?

[Brushless55]

I found the two-part thermal expxy to work great. Here are some pictures of mods that I did on 100 and 200 Amp inexpensive Mystery ESc's. I think the controller circuit board is the same for many of the ESC's that fall in this same class. (compare the close up pic with your controller) They up the amp ratings by just adding more FET boards.

My mods include:
adding more caps, generally to 4000 uf
ALWAYS using a BEC
re-routing all the wires so they come out the same end.
adding a thermistor to measure DIRECT FET temps, not just the surface of the heat sink
adding a 100ohm 1 watt resistor to prevent arching when connecting
Increasing the power wire size to 10 guarge with large bullet connectors.
On some units I also put a copper heat sink on the caps and a thermistor under it to measure actul cap temps (all feed into my Eagle Tree)


Pics attached. Suggestions?

Good stuff man!