Thane Heins Perepiteia.

[LarryC]

I don't want to get off topic here but I was taking some transformers apart for a different experiment when I thought it might be possible to get a rectangular configuration of Thane's toroid transformer to behave in a similar manner. I cut down several similar transformer and welded them together so that the outer legs have secondary coils on them and the center was left open to try different primaries. You can look at the construction in the link below. I was trying to see if I could get the thing to operate on one of Thanes goals; that is, not drawing additional current on the primary when the load is applied. I have been trying several different primaries with an air gap and many different cross sections and sizes. 

So far I have noticed that with all the coils the configuration works great as a regular transformer. I found that if you load only one of the secondary coils there is no extra draw on the primary, but  if you load both sides the current increases with the load just like a regular transformer. 

Thane or Luc

I'm not sure how you wired your two secondaries together but I would appreciate any comments you may have.

http://picasaweb.google.com/vincemormile/Transformer02/photo?authkey=zxCjMbm16To#5183750246070079682

Thanks
Vince

Hi Vince,

I had made a smaller bi-retangular generator previously. I did not have any primary increase when both coils were loaded, also when cross wired and loaded. It was even the same when both was unloaded. The generator was not very efficent so that may be why mine did not have the problem. How or where did you get your transformers? My secondarys was hand wound and may be why my version was not efficient.

Thanks,
Larry

[vince]

Hi Larry;

I had about 8  similar power supply transformers for some old cash registers.  My unit uses the primary and secondary combo from the center of the originals, installed on the newly formed outer legs. I have been trying various primary coils from all kinds of things and even some hand wound ones.  I have not tried any serious attempt at connecting all the secondaries but I will continue so to see if I can get it to react like Thanes.  An earlier incorrect attempt at this ( you can find it way back in this post) was successful at not drawing extra from the primaries but it could produce NO real power for a load.  This one will power a load and needs to be tested further.

Keep experimenting!
Vince

[polarbreeze]

[...]what I posted about load stability/instability is hardly an "untested theory" - it's textbook stuff and it does explain all results that have been observed posted to date AFAIK.

It only explains the results we've seen in the videos if you assume completely implausible values for one or more of the physical parameters.

Mr. Entropy, you may be right but I'm wondering which physical parameters you think would need to have implausible values? As far as I can see, the only requirement would be that by changing the coil connections you can cause the the torque-speed characteristic of the device to go from being a stable one to an unstable one with that particular motor - and there seems to be plenty of opportunity to do that with all the coils and magnets that are in play there, don't youÃ, think?

PB

[OilBarren]

Dear All,

I just sent some really great pictures to JustMe of Luc hard at work creating a 700 strand Litz primary.  Pay close attention - that is 126 feet of wire he is using and he made 3 spools like this. (hopefully she can post them soon)

It takes about 4 hours to lay down what you see in the photos and about another 4 hours to wind 1 spool. That?s after he washes the floor first.

Luc has spent the past 3 days and about 30 hours creating a new primary ? hopefully it will work out?

Thane

[JustMe]

Luc @ work: