Conscious of the importance of cooling down power electronics , I decided to measure the FOCBOX mosfet temperature using the bluetooth module and the iphone app. This post will be a comparison like for like.
2 rides 1 day apart, same set up same rider , me , The heatsink was mounted using a thermal compound with 4-5W/mk of thermal conductivity to improve the contact. The heatsink is slightly greater than the FOCBOX baseplate.
RESULT !!! : max temp reached 80degC without and 63degC with the heatsink , so it definitely works!!
I think I will safely raise the max current limit knowing the cooling is improved
Given how wide the FOCBOX is , this method is better than adding a fan from a thermal conduction standpoint. A fan would be useful only if a heatsink is present as the heat exchange surface is much increased.
wow that is really interesting so !!
I used to ride under vesc6 FOC dual 6374 130kv 12s(12Ah)
But it dont exceeds 45°C (“hard ride”) / 34°C (under snow time) in a closed box.
But for my esk8 I will use Fox so your report is very interesting, especially since I was thinking about to put everythingin a closed and watterproof box too …
Really guys I don’t understand how cool my vescs ( Maytech ) are going under hard riding without any cooling, with 2 6355 16/36 I never go up than 40~45 degrees. Riding a raptor 2 also around 50~55 degrees Max, and I’m a heavy rider, 110kg fully pack.
Ok, that perfectly make sence to me Love this topic ! Thx for the infos Im missing !!
It will be a dual esk8 but only use the beautifull days (potentially hot).
I got it with Ackmaniac and metr.app (around Paris, I got some VDLA on my build ) spec are 70amps motor max, 65 amps batt max on itch v6.
But E1Allen seams to be dual too … maybe the not the same ambiante temperature, but almost same as your single. Surfer … wow your V4.xx stay super cool ! Air forced ? I gonna take a look at your build
Also, I’m running hard my e-dirt scooter under fox seens friday (vs. VESC 4.10 before ), its actually open air, I will put my BT module on it to see the temp (its less than 5/10°C outdoor). And then made the upgrade to see the profit !
I think its a good point and always could help our build (especially this summer).
You mean one VESC has a heatsink and one has not while you captured both datas?
Well, i think you have here two different runs with the same Setup but still not the same run.
I can clearly see that both runs differs in Terms of Speed. Round about 6:40 you have one time a complete stop and one time not. So the difference will add up over the entire run thus making it not well analyseable.