Hello everyone,
I have been searching for a motor for my project for some time now. Its not exactly an e-foil, but this forum is the closest I have been able to find; as far as utilizing a submersible sensor less brushless motor, waterproof esc’s, lifepo4 battery packs, etc.
The project is a small submersible centrifugal pump system that is backpackable. Since it being hiked in, I would like to use the power effeciently.
I currently have a working version using a Flipsky 5062 at 160 kv. If the motor data sheet can be believed, it reaches peak efficiency at 5.5 amps, which is near ideal to get a reasonable run time out of my available battery packs. I only have 2 issues with the current motor (if the motor data sheet can be believed). First is that the kv is a bit low at 24 volts. It works great at 36v, but that means backpacking the larger of the battery packs. The second issue is the motor being an outrunner; I dont have the number off the top of my head but the shell spinning underwater with no load causes a fair bit of drag, nearly 1.5 amps increase in running it in open air to running it underwater.
Here’s the motor for those interested: ( Flipsky Waterproof Brushless DC 5062 Motor 160KV 1100W with Propeller – FLIPSKY )
So I am wondering if anyone here might know of a source for an ideal motor. I know that my application is a bit smaller and higher KV rated than typically used for foiling, but I can hope.
The ideal motor would be:
-Inrunner
-24-36v nominal
-200-300kv
-Max effeceiency reached at 5-10 amps
If you haver any thoughts, please let me know. I have thought about putting a close fitting shell around the outrunner bell to see if that would reduce the parasitic drag. However, Im not sure that the ‘pocket’ of water that would be trapped in the narrow gap between the static shell and spinning motor housing wouldnt cause more drag to begin with. More experimentation may be needed.
Lee