chuyskywalker
10 kW
So, I burned out some wires in this little DD hub motor (8.5" from a hoverboard).
The obvious solution (which I'll implement on the next one) is a temp sensor with rollback. I may even split the load on the motors further by going from 2 rear wheel drive to all wheel drive
However, it seems that all the real damage was done in these "cross over" connections. I would imagine the explanation is that since these are (mostly) just hanging in space, their lack of a place to dump heat means that they take the brunt of damage when pushing too many amps.
So the question: is there any way to help these crossing keep cool?
I've read up on several of the air cooling threads here and I don't think that's the solution for this application. For starters, this is a single sided motor and most of the test results I saw said that only adding holes on a single side does very little, and it would be quite tough to add holes on both sides. In addition, there is very little space inside this motor, so adding something like internal fans for forced cooling isn't likely. As for adding internal blades to push air around, that's possible, there is a good deal of space in the shell as it's about 40mm wide, but only has 25mm stator/magnets. However, I'm not confident enough to make something that would work.
I might consider ATF for this setup. One of the most cited issues is that, if it leaks, you ruin your brakes. Well, this little powerwheels setup is all regen braking, so there's nothing to ruin. Plus, since it's one sided I only need to worry about sealing one side, which reduces leak chance by 50%! ;D
The obvious solution (which I'll implement on the next one) is a temp sensor with rollback. I may even split the load on the motors further by going from 2 rear wheel drive to all wheel drive
However, it seems that all the real damage was done in these "cross over" connections. I would imagine the explanation is that since these are (mostly) just hanging in space, their lack of a place to dump heat means that they take the brunt of damage when pushing too many amps.
So the question: is there any way to help these crossing keep cool?
I've read up on several of the air cooling threads here and I don't think that's the solution for this application. For starters, this is a single sided motor and most of the test results I saw said that only adding holes on a single side does very little, and it would be quite tough to add holes on both sides. In addition, there is very little space inside this motor, so adding something like internal fans for forced cooling isn't likely. As for adding internal blades to push air around, that's possible, there is a good deal of space in the shell as it's about 40mm wide, but only has 25mm stator/magnets. However, I'm not confident enough to make something that would work.
I might consider ATF for this setup. One of the most cited issues is that, if it leaks, you ruin your brakes. Well, this little powerwheels setup is all regen braking, so there's nothing to ruin. Plus, since it's one sided I only need to worry about sealing one side, which reduces leak chance by 50%! ;D