Can You 3D-Print A Stator For A Brushless DC Motor?

Betteridge’s Law holds that any headline that ends in a question mark can be answered with a “No.” We’re not sure that [Mr. Betteridge] was exactly correct, though, since 3D-printed stators can work successfully for BLDC motors, for certain values of success. It’s not that [GreatScott!] isn’t aware that 3D-printed motors are a thing; after all, the video below mentions the giant Halbach array motor we featured some time ago. But part of advancing the state of the art is to replicate someone else’s results, so that’s essentially what [Scott!] attempted to do here. It also builds on his recent experiments with rewinding commercial BLDCs to turn them into generators. His first step is to recreate the stator of his motor as a printable part. It’s easy enough to recreate the stator’s shape, and even to print it using Proto-pasta iron-infused PLA filament. But that doesn’t come close to replicating the magnetic properties of a proper stator laminated from stamped iron pieces. Motors using the printed stators worked, but they were very low torque, refusing to turn with even minimal loading. There were thermal issues, too, which might have been mitigated by a fan. So not a stunning succ...

Friday’s Rugby News sees the Wallaby squad announced, young guns included, Brumbies lineout break down, and the

Friday’s Rugby News sees the Wallaby squad announced, young guns included, Brumbies lineout break down, and the Super Final   Wallabies Named! First the big news. Christian Leali’ifano is back in gold for the first time since 2016. Lilo, in this reporters opinion, has been the best flyhalf in the country this year it only remains to be seen if that form can translate to test rugby. Hopefully, we’ll have a better idea after he plays his 20 test, this time against the Springboks, in a couple of weeks. Lilo’s inclusion probably comes at Quade Cooper’s expense but that’s probably not that surprising. With Bernard Foley being a long term favourite of Wallaby coaches for years and Matt Toomua being more than a one trick pony Cooper was always going to make way for Leali’ifano. Young gun Joe Powell, Lilo’s halves partner, has also made the squad. No prop ever really likes a halfback. Yap yaps with a Napoleon complex is the general consensus. Powell must have talent because he annoys this old prop from an entire state away. His inclusion comes at the expense of long term bench man Nick Phipps whos Wallabies career may be over. The Squad: Forwards Allan Alaalatoa (32 Tests, Brumbies, 25)...