3 ms·
What are the weight savings? Am I even reading correctly that reduced weight is the main motivation for the change in materials? I've always been under the im
by jaytaylor 5y ago
What are the weight savings? Am I even reading correctly that reduced weight is the main motivation for the change in materials?
I've always been under the impression the heavy parts of electric motors were the copper windings, magnets, and outer casing.
If nothing else, the name sounds exotic and cool in a futuristic way.
- gameswithgo 5y ago
- adrian_b 5y agoThe claimed weight savings are because the stator does not use any ferromagnetic materials, i.e. iron alloys, and because the coils are printed on a multilayer PCB instead of being wound on a heavier support. The stator can be made e.g. of aluminum or plastic, so it should be much lighter than an iron stator. In this motor, the only ferromagnetic parts are 2 discs that compose the rotor, which are made of iron alloy discs on which flat permanent magnets are attached. The 2 rotor discs are very thin in comparison with traditional rotors, so they should also be lighter. So the claims about a much lower weight are perfectly plausible. Whether this motor is good for other performance characteristics, e.g. efficiency (the arguments about lower ferromagnetic losses than in a conventional motor are plausible, but it is hard to make PCB windings with low losses at high currents), torque per size or power per size, is much less clear, because no relevant numbers are provided.