9S6P BLDC Motor

thingiverse

A moderately strong, compact, and balanced 9S6P radial flux brushless DC motor Additional parts required to purchase: - 20 AWG Gauge Enameled Copper Wire for winding the stator (about $10 on Amazon) - A non-hall effect BLDC Electronic Speed Controller (about $15 on Amazon) - 2 x 608 bearings for end-caps - 12 of 20 x 10 x 3mm ND50 magnets (actually 19.2 x 9.6 x 2.75mm). (About $10 for 30 on Amazon) Printer supports needed for the stator poles Stator has 40 turns per pole in a simple ABCABCABC winding pattern. I used a Wye/Star style connection for simplicity, but Delta is also fine of course. The magnets are just press-fit into place in pairs for added magnetic flux strength. The magnet poles are NSNSNS around the rotor. This design has a large amount of air-gap between the stator and the rotor magnets because the rotor is intended to be sealed within a pump casing, so this design is a proof of concept that the stator will provide sufficient torque to start the pump rotor up, and it does. This design will easily start the axle from the stopped position and pull it from your fingers even if squeezing fairly firmly.