4 ms·
I wonder how well the dielectric fluid holds up if the motor is spinning at several thousand RPMs for dozens of hours?
by spankalee 2y ago
I wonder how well the dielectric fluid holds up if the motor is spinning at several thousand RPMs for dozens of hours?
- pragma_x 2y agoI suspect heat is a limiting factor here. Also, if the vanes of the rotor are spinning _in_ the fluid, doesn't this also make it a torque converter? If so, then suddenly stopping the motor could be catastrophic depending on how much kinetic energy is in the system at the time.
- marcosdumay 2y agoFrom the context, I'd guess they want their motor to spin at single digit RPMs, not thousands of them. That's the stuff magnetic motors are bad at.
- imtringued 2y agoYeah, all you have to do to get a conventional motor to spin faster is to make it longer. When people show off their high speed motors they are actually showing off the easy part. It is much harder to get high torques, because you need to increase the number of poles and the diameter.
- DoctorOetker 2y agoutter nonsense. small RPM but high torque electromotors are made by making them longer, make a motor axially longer by a factor L, and the torque will multiply by L, while the volume also increases by L. suppose we followed your advice and multiplied the diameter by the same factor L to get the same increase in torque, now the volume is multiplied by L squared!