The only thing actually 3d printed here is ridged container for holding the permanent magnets in place. PCB electromagnets are not new and multilayer interconnect PCB boards have been around for 30 years. A real 3d printed electric motor would be quite a feat indeed.
That has me wondering if kind of a hybrid solution could work, like a 3D printer that can also pick and place components mid-print. That could be a reliable way to deal with the permanent magnets, since presumably there isn't going to be a way to print out any material that would magnetize itself reliably.
The tech has existed for a while to embed components inside PCBs --- inserting them into voids during the lamination process. Small discretes (capacitors, resistors etc) up to full magnetics are being embedded in production.
There is a solution for "printing" magnetic domains in a base magnet, maybe a printable material could be devised such that later on a "magnet writing head" could create whatever magnets are needed.
I more mean in reference to using them as an opposing magnetic field for using in an electric motor. Like suppose he simply put two PCB electromagnets together. What would you expect the force to be?
I'm sorry I read your comment as a general statement on electromagnets. Yes, two PCB based electromagnets are not going to be able to make a very dense magnetic field. The major reason is that the current carrying capacity and cooling will be lousy. But a sizeable electromagnet made from a copper coil and a half decent core material will happily lift your car.
