How to provide power to a spinning circuit ?

Jul 21, 2004 22 Replies
J

Hi Tauno,

The coils would have to be perpendicular to the shaft, not wound around it. For example, you could have several oblong coils wound on flex or baked into a molding and the winding would never loop around the shaft. You could even have only one coil but that is difficult to mount and clean unless you use a flex circuit that can be wrapped around and held at a distance from the shaft's surface. The thing is to create an antenna that has a reasonable effectiveness.

Yes, the air gap can be a problem. But it may be ok if you only need little power and there is no hardcore limit on primary power (not battery powered etc.).

Regards, Joerg

formatting link

Vote
Twitter Facebook LinkedIn
C

If you already have something rotating, why worry about any funny transmissions. Just create a magnetic field with a permanent or electromagnet, mount some sort of coil on the rotating device, and presto, you have an alternator. The real power source is whatever is doing the spinning.

I am coming in late, so I may well have missed something mentioned earlier.

"The most amazing achievement of the computer software industry is its continuing cancellation of the steady and staggering gains made by the computer hardware industry..." - Petroski
Vote
Twitter Facebook LinkedIn
G

In this particular case, IIRC it spins too slow and needs too much power for that the be practical.

A rotating transformer is the best answer in this case. It's just like any other transformer, except the primary and secondary can rotate relative to each other. Standard, off-the-shelf technology.

Vote
Twitter Facebook LinkedIn

Join the Discussion

Have something to add? Share your thoughts — no account required.

Didn't find your answer?

Ask the community — no account required