Coming back to this topic, I’m still focussed on finding the right water pump for ESC cooling. My mast (RL-Board custom lenght mast) doesn’t have any chamber in front, so no way to use that as dynamic pressure intake. I’m left with the hose-thru-mast (near trailing edge chamber), and here it goes the “Which pump do I get?” struggling doubt.
Acquarium submersible centrifugal pump, quiet, powerful… not selfpriming.
Peristaltic type, noisy, extremely low water flow… selfpriming.
What you guys use to cool the ESC? Could it work a centrifugal model, if receives backflow of water from the outlet, before to start it when the board tail is still on water? Could it acts as a priming?
Yes it is. It’s pretty easy to modify the software and add custom applications running on the vesc.
BUT that’s usually unnecessary.
The computer software that comes with it is of really high quality. You can view all currents and voltages in real time while testing. And it has configurable current limits for everything and anything.
With standard cooling it’s only rated for 60A and 12S. Mine with a custom, isolated aluminium heatsink did not get above 40°C with 80A. Sadly I killed it on the test stand by my own foolery and have yet to repair it.
No way to use VESC right now. Current motors are 500kv and people running 12s. Also people running higher current.
We need to wait for a true 100kv without a gearbox and high power inrunner before we can consider focboxes/vesc4/etc.
I’m not sure I follow your thought here. How will a 100kv motor help here? I assume the amp draw will be similar to the existing motors (we do need this power).
It is in progress right now. APS has a ‘powerglide’ motor, which is a 100kv 4kw 5684 (iirc) inrunner. It JUST came out, but the issue is just that there hasn’t been a need to develop motors in that size, kv, and power until now.
the 150kerpm is burst. I have significant doubt for holding a 150kerpm for any duration of time longer than a few seconds at most. Not to mention the VESC6 is $300+ and there just aren’t enough people testing it for reliability.
Use a diaphragm pump. They are quiet, self-priming and can run at 5V, should be used together with a filter on the inlet side to remove debris.
The ESC with some heatsink to it can run almost without cooling (takes 10 min before overheating). so the water flow needed it not very high, we have good results with the pump above. Altho you need to rinse the system after use to prevent salt blockage in the tubing.
the rinsing is easy when you use a pump, its more tricky if the system is pressure based.
I use a closed system with a cheap pump from a windscreenwiper. Asssuming power use is 2Kw and the losses in the esc is 10% ->. heatingpower is ,2Kw. It will take 33min to heatup 1,2L water 80 degrees. Water volume then has to be adjusted by trial and error. If the esc efficency is a lot worse it will not work.
How big battery pack are you using with this? I have the parts for a closed loop system as well, also a aluminium heatsink that can dissipation heat from the water. Nice to not need flushing of the system, but 1.2 L gives some extra weight tho.
I used to run it on 4 AA batteries since the pump dit not need to spin at full rpm, it did last for a few sessions. Now I have a bec with adjustable voltage from Hobbyking. The good thing is you do not have to think about priming the pump and no worries with dirt. The water volume can be reduced if there is som dissipation in thee system.
Thank you Hiorth, I’ve ordered one. Lucky me I heard a mini peristaltic running:- not on the quiet side! Thumbs up for all your development, an max respect for you guys that still riding in January in Norway! I’ve been there lately and I won’t even dare to touch the water!!
not on the quiet side! Thumbs up for all your development, an max respect for you guys that still riding in January in Norway! I’ve been there lately and I won’t even dare to touch the water!!