Power cable that can spin ? or other alternatives. Help Please
Power cable that can spin ? or other alternatives. Help Please
(OP)
Hey,
1. Imagine electric device.
2. This device must have power cables, to get electricity of course .
3. This device itself, must spin.
So here is a trouble i am facing:
Device must be powered by cables in order to function. Device itself spins, it must in order for my finish product to work
How do i connect this device to power supply , without power cables being spined aka. torn apart when device itself will spin ?
Thanks for your help, A LOT !
1. Imagine electric device.
2. This device must have power cables, to get electricity of course .
3. This device itself, must spin.
So here is a trouble i am facing:
Device must be powered by cables in order to function. Device itself spins, it must in order for my finish product to work
How do i connect this device to power supply , without power cables being spined aka. torn apart when device itself will spin ?
Thanks for your help, A LOT !





RE: Power cable that can spin ? or other alternatives. Help Please
Its heating.
But it must spin Physically.
RE: Power cable that can spin ? or other alternatives. Help Please
RE: Power cable that can spin ? or other alternatives. Help Please
But this is exactly what i was asking for.
I will check Slip rings and study how they work.
Thank you very much David !
RE: Power cable that can spin ? or other alternatives. Help Please
RE: Power cable that can spin ? or other alternatives. Help Please
Why does it need to spin?
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RE: Power cable that can spin ? or other alternatives. Help Please
RE: Power cable that can spin ? or other alternatives. Help Please
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RE: Power cable that can spin ? or other alternatives. Help Please
RE: Power cable that can spin ? or other alternatives. Help Please
RE: Power cable that can spin ? or other alternatives. Help Please
I.e. if the spin is limited to a couple of revolutions, like a car's steering wheel, a clockspring conductor, or just a dangling loose cable, might be sufficient.
(Clocksprings as used in cars today are a mature product.
The early versions were subject to many failures.
Do not underestimate the real cost of developing your own.)
<tangent>
Some friends of mine were associated with a windmill, designed by Grumman in Bethpage, NY, and installed near Potsdam, NY.
Grumman included mercury-wetted sliprings to allow free rotation. Mercury freezes solid at -40F or so.
Does it ever get to -40F in Bethpage? No, never.
Does it ever get to -40F in Potsdam? Yes, every damn year.
While they were repairing the damage from the frozen sliprings, my friends noticed that the ropes used for manually yawing the generator didn't get kinked, suggesting that the generator head had rotated a lot, but never farther then +/- one revolution from its initial position.
So the second iteration replaced the sliprings with long cables dangling loose inside the tower, secured only at top and bottom.
</tangent>
Mike Halloran
Pembroke Pines, FL, USA
RE: Power cable that can spin ? or other alternatives. Help Please
We once instrumented a part being cut on a lathe with strain gages, to monitor stresses in a critical part while turning. We looked at a lot of alternatives, but to keep the signal as noise-free as possible, used a 10' length of cable strung through the tailstock and held at the connection to the signal processing equipment. We would turn on the lathe and start cutting, knowing we had several minutes before the cable would wind up to the point of breaking (roughly 1000 revolutions IIRC), we only needed 200 or so turns to perform the cutting operation and so had plenty of safety margin. Then just reversed the lathe after each run to unwind the twisted cable. Worked like a charm.
</tanh>
RE: Power cable that can spin ? or other alternatives. Help Please
Other options are induction heating, and heating with a flame or hot air blowing on the rotating object.
RE: Power cable that can spin ? or other alternatives. Help Please
The heated steering wheel in my car is powered by a DC-DC converter. The purpose is to increase the voltage and reduce the current being transmitted through the slip rings or whatever they're using.
In other words: You can, if it helps, fiddle with the voltage / current ratio to cross the rotating gap. If required, you can fiddle it back on the other side.