Pierre's 170W in 1600W out Looped Very impressive Build continued & moderated

[citfta]

You have a bad connect on the lower left switch.
Also, you have 4 relays between the coils on the end (two to the left of the first, and two to the right of last) not 100% why that's causing the oscillation, since it should be just the same as having the first closed; which it already is...


-----
@any


Any advice where to source AC motor/generator cores?  Was considering getting a alternator from the junk yard, but they don't have very much metal on the outside for the outer flux path.

Here are a few links to places to look for surplus motors:

https://www.surpluscenter.com/

https://www.blowerwheel.com/electric-motors

http://www.skycraftsurplus.com/dcmotors.aspx

[r2fpl]

You have a bad connect on the lower left switch.
Also, you have 4 relays between the coils on the end (two to the left of the first, and two to the right of last) not 100% why that's causing the oscillation, since it should be just the same as having the first closed; which it already is...


-----
@any


Any advice where to source AC motor/generator cores?  Was considering getting a alternator from the junk yard, but they don't have very much metal on the outside for the outer flux path.

Who said it could not be different? Pierre did not say everything. Most important thing is joining the stator. There are many options.

[r2fpl]

Another version:

http://tinyurl.com/y7uml9dt

[T-1000]

Another version:

http://tinyurl.com/y7uml9dt

The correct switching positions would be:
step1) http://tinyurl.com/y7vsxqdq then delay()
step2) http://tinyurl.com/y77hkk2q then delay()
step3) http://tinyurl.com/ycarhljp then delay()

Cheers!

[d3x0r]

Here are a few links to places to look for surplus motors:


https://www.surpluscenter.com/


https://www.blowerwheel.com/electric-motors


http://www.skycraftsurplus.com/dcmotors.aspx

There's a Granger down the road... https://www.grainger.com/content/general-catalog  but kinda silly to get a new motor...
I also thought maybe AC (air cond) repair places? (like the blower fan motor but tthat's < 1HP)

Who said it could not be different? Pierre did not say everything. Most important thing is joining the stator. There are many options.

Ya; but when attempting at replication I prefer to try to match paramters as close as possible; since I don't have anything else immediately available that's viable...
I have  a bunch of E cores, which I can sort-of use; but they are very small; so using 24ga wire it's really low inductance; and 32 ga wire is much better inductance; but with 12V doesn't really generate a good field (too much resistance); so I don't those will be viable... plus too many wedge-shaped gaps inbetween...


also considering the null results vs what I have seen of other replicators; that might be a factor;
also I don't know if the slots are important; such that a ferrite filled coil set should also have the fingers?