Have you been able to measure the flux change that the coil sees with a gauss meter?  It would be interesting to note how much it changes.  You have to be getting quite a bit to produce 50 Volts - or you have a bazillion turns haha.  At what RPM do you get 50 Volts?  How many turns are in your coil and what is the cross sectional area of your coil's core?  We can back calculate the flux change if you don't have a gauss meter.

I'm in the process of building a generator that operates on a different phenomenon.  I'd like to compare the flux change between the two techniques.  I'm still not fully convinced what I'm building is going to be back EMF free but using permanent magnets to simulate a coil seemed to give really good results.  Hopefully there is more than 1 way to skin a cat!

One last question, when your coil is outputting 50V and you dead short it, what is the current flow?

Good night,
Charlie

Quote from: Charlie_V on August 14, 2008, 07:53:59 PM
Have you been able to measure the flux change that the coil sees with a gauss meter?  It would be interesting to note how much it changes.  You have to be getting quite a bit to produce 50 Volts - or you have a bazillion turns haha.  At what RPM do you get 50 Volts?  How many turns are in your coil and what is the cross sectional area of your coil's core?  We can back calculate the flux change if you don't have a gauss meter.

I'm in the process of building a generator that operates on a different phenomenon.  I'd like to compare the flux change between the two techniques.  I'm still not fully convinced what I'm building is going to be back EMF free but using permanent magnets to simulate a coil seemed to give really good results.  Hopefully there is more than 1 way to skin a cat!

ACTUALLY I AM NOW UP TO 61.5 VOLTS @ 3500 RPM AND THE MOTOR CURRENT DROPS AND THE MOTOR ACCELERATES SLIGHTLY UNDER INFINITE LOADING - SEE HERE:
http://www.youtube.com/watch?v=wy-N6dxX-u0 AND HERE:http://www.megaupload.com/?d=33TN49SX

I HAVE SKINNED THE SAME CAT 4 TIMES NOW.

CHEERS
Thane

@ Thane...

I am sorry, but after seeing your last demo above - I have to admit that I am very anxious to see the battery test demo...
Look like you are ready man!
Go for it!

What is the infinite load current in the coil - can you measure that for me?  Also, be very careful Thane!  The reduction in current and increase of the rotor speed could be another effect.  If there is magnetic drag on the shield, the magnetic flux produced from the coil could place the shield into a saturation mode in which case the magnetic drag would lower, you would see an increase in the rotor speed and a decrease in current - be very careful!  Otherwise, I think you are moving in the right direction. 

Really try to counter balance that rotor so you can reduce the motor size.  By the way, what is the voltage supply on the motor right now - 120V?

Regards,
Charlie

PS I like your shop!