4 ms·
I wonder if robots could be made to work better at cryogenic temperature, so superconductors could be used. The figure of merit would be much higher if resista
by pfdietz 8mo ago
I wonder if robots could be made to work better at cryogenic temperature, so superconductors could be used. The figure of merit would be much higher if resistance was zero. Or maybe this is another reason to want room temperature superconductors.
- Robotbeat 8mo agoEven copper has vastly lower resistance when cryogenically cooled. It's not a bad idea for some applications, and water cooling is already a good way to increase power density.
- hinkley 8mo agoI learned recently that the inductive heating coils used for metallurgy (smithing) are copper tubing with coolant flushing through them. The copper tries to heat up along with the bar you’re heating in the coil. Both from resistance and from radiative heating.
- blueblisters 8mo agoYou would hit electrical steel saturation limits way before you need to pump in enough current to justify super-conductance. Cooling in general is not a bad idea to allow you dissipate heat as you push motors to their saturation limits.
- PowerElectronix 8mo agoPower disipation in the motor is not the limiting factor. Moving a robot requires work and the motor provides that work with a high eficiency already. Plus, cryo temps require a lot of power to keep thing cool and coper and iron embrittle so the forces acting on the winding could shatter them.
- hrmtst93837 8mo ago[flagged]