Inductive power transfer design 1

[DangerousDan]

I am searching for any references to inductive power transfer. Specifically, I am looking for information on coil design, etc. for designing an inductive power transfer system (I need to transfer power across a 1 inch gap to a rotating machine, and I can't us a slip ring) If anyone has run into any references on this obscure subject please let me know...

 

[Warpdrive]

Dangerous Dan,

There are lots of books you can consult on electromechanical energy conversion. Most of these have practical applications heavily reliant upon inductive energy transfer. Books on transformer design may also help, since that is essentially what you are designing.

If all else fails, remember the science:

1. Magnetic fields degrade quickly with distance from the coils generating them (it's an inverse square law).
2. To generate current in a remote coil, the magnetic field vector must run at right angles to the wire receiving its energy.
3. Transformers typically have iron-based cores to store and align the magnetic field. If size and weight requirements allow, use these cores with your coils to increase transfer efficiency.

Enjoy.

-- Warpdrive

 

[nbucska]

How much power do you need and how fast does it rotate ? <nbucska@pcperipherals.com>

 

[BrianR]

A 1&quot; gap in a magnetic circuit is quite large so unless the cross section of the pole faces is large compared to the 1&quot; gap, there'll be very large losses through leakage inductance. Transformer design techniques will help and so will carefull thought to the shape of the poles to enclose the field.

 

For contactless power transmission through an air gap of 1 inch length, you need high frequency (about 20 kHz).
For Linear Power tRansfer system you can check the companies sites:

Http://www.vahleinc.com;

Http://www.vahle.de;Http://www.wampfler.de.

For rotating transformers I can design one for you. Please let me know.
Yours sincerely Ion Dava.

 

[jbartos]

Suggestions: There is also a good literature available in terms of:
1. Books
Gordon R. Slemon, &quot;Magnetoelectric Devices, Transducers, Transformers, and Machines,&quot; John Wiley and Sons, Inc., New York, 1966
M. G. Say, &quot;Alternating Current Machines,&quot; John Wiley & Sons, New York, 1978
A. E. Fitzgerald, Charles Kingsley Jr., Stephen D. Umans, &quot;Electric Machinery,&quot; 5th Edition, McGraw-Hill, Inc., New York, 1990
2. Papers
2a. Listed in the above References
2b. Science Citation in your library

 

[DON43]

might also try syncronous motor,squirrel cage motor,i will find something on it and repost