Iron core serpen test

[vawt]

hi guys, i just want to share this project with you.
http://www.youtube.com/watch?v=l6vFatalNRc&noredirect=1

It was fun making the PMA


sam

[RP]

I'm not familiar with "Serpen".  What does that mean?

[Watt]

http://www.youtube.com/watch?v=zgdf1TkNocE&feature=relmfu

Maybe this.

[vawt]

I'm not familiar with "Serpen".  What does that mean?

this silent video represent a serpentine coil.
http://www.youtube.com/watch?v=S7aj-OvEpKA

sam

[electrondady1]

serpentine is just another way of saying wave wound.

i had to check your other video to see what was going on inside  the rotor.
how is the cogging?
is the alternator easy to turn?
using your numbers, 1.4 ohms and .9 ohms
there is 60% more resistance in the conventional coil layout.
so in order to get the same voltage does the wave wound need to be spun 60% fast?

[vawt]

how is the cogging? is there but a smooth jag not sharp, maybe because the core i used, the slots were slanted.
is the alternator easy to turn? it was no Axial flux, that is for sure, it consumed 3 times as much Axial just to start and double the wattage to free wheel.

there is 60% more resistance in the conventional coil layout. that is correct
so in order to get the same voltage does the wave wound need to be spun 60% fast? yes, however, at higher rpm it consumed lesser than the traditional coils for the same wattage produced.

sam

[Ungrounded Lightning Rod]

I.e. 60% less due to the differences in wire size/turn count etc between the original and your rewind.

Serpentine doesn't differ from conventional in the resistance for the same number of turns of the same size wire in a cored design, if you do each right.  It's mostly a matter of what's easier to fabrocate in your particular case.  (For a coreless axial flux there's the issue of getting the between-slots to overlap
without thickening the stator or reducing the conductor density in the active region.  It's easier to overlap a single wire than a bundle.)

Only turns count, magnet flux, and RPM affect open-circuit voltage.  The resistance change only affects the DROP in voltage with load current.

[electrondady1]

still trying to under stand what you did here Sam.
20 turns each
the wave is single phase  @.9 ohms ?
1.4 ohms for the conventional coils you wound.
 are they three phase or single?
i"m confused,  when you mentioned it was wired in star.

[vawt]

still trying to under stand what you did here Sam.
20 turns each
the wave is single phase  @.9 ohms ?
1.4 ohms for the conventional coils you wound.
 are they three phase or single?
i"m confused,  when you mentioned it was wired in star.

The doubt was that the serpen will not produce any usable power, however, The test showed that the serpen coil can produce usable power, and it can be more effecint at higher rpm.

inside the stator there are 3 phase of serpen coils and 3 phase of conventional coil. each group of 3 phase are wierd in star connection seperatly.


sam