Halbach Open BLDC Motor First Release by usertogo

Last crawled date: 3 years ago

Untested first parametric release of an outrunner BLDC motor
Parametric design can be adjusted for pole pairs (quadruplets because of Halbach setup), magnet sizes and such; however many aspect will have to be manually calibrated... The individual elements have to be accessed for stl exporting by commenting/uncommenting(//) the particular lines. So far there are only 3 printed parts Base, Stator and Rotor. First test print shows that the mating feature between stator and base is too tight to fit and will need some coding...
12xM3x__ Nuts and bolts for base and ?Prop? mount
1x 6807 Bearing (if you buy this from my Ebay Store send me a message and get the 608ZZ Bearing included for free! https://www.ebay.de/itm/184239183693 )
1x 608 Bearing
M8x100 screw or threaded rod plus nuts
24x Magnet 50x5x2.5 mm
winding wire
For general hints on wiring/winding a motor like this refer to the pioneers work: https://www.instructables.com/600-Watt-3d-printed-Halbach-Array-Brushless-DC-Ele/https://www.makesea.com/web/claimer/brushless-motor
looks like my current configuration has not nearly as much space for windings as these samples... However do notice how much my design has been simplified in comparison to the 'inspiration'!
Naturally everything is open to configure in the scad file
Do participate in Open Source developments cause we can not take anything material to the next incarnation...
Notice the vented rotor configuration I added, which will result in extra cleanup difficulties, but might help to mitigate a prime concern of these type of experimental motors. The problem is that specifically PLA loses its defined shape already above 50 degrees Celcius and other plastic materials under continued tension and thermal cycling might also only add a few degrees to the operational range. The holes will also help to press out the magnets if that was ever necessay. They should when the motor is spinning accelerate some air outward which will lower the air pressure inside the motor which will help cooling the motor! I might add something similar to the stator from the winding inward - seems like a good idea too!