STEORN DEMO LIVE & STREAM in Dublin, December 15th, 10 AM

[Groundloop]

Mark,

I can't be 100% certain that the change between transistors was the only factor.
But it sure looked that way to me when testing. And I agree with you, only testing
can confirm that. The input was from a 12 volt battery when the hexfet did blow up.
I did run the switch very hard but I do not think that I exseeded the current limit
of the hexfet. Hard to know, I was not looking at the amp meter. It could have been
inductive kick back voltage spikes from the toroid coils that did destroy the hexfet.

BTW: I have been above 400 VAC from the generator coil with the new IRF540 hexfet.
        It seems that there is a lot of voltage but very little current.

Alex.

[callanan]

Hi All,

I have started to work on a low friction rotor to see if I can get the input power down further whilst keeping the RPMs up. That old castor wheel I was using, with huge bearings, really had a great deal of friction and weight... Take a look.


http://www.youtube.com/watch?v=eGHCDgZt6ag


I have also learnt how to annotate my videos.

Regards,

Ossie

Hi All,

I have completed my low friction rotor and it takes 3 minutes to spin down. This is a big difference from my previous rotor which would spin down in 30 seconds and weighed considerably more.


http://www.youtube.com/watch?v=dWRLqk11o28


Regards,

Ossie

[markzpeiverson]

BTW: I have been above 400 VAC from the generator coil with the new IRF540 hexfet.  It seems that there is a lot of voltage but very little current.

Alex.

Not necessarily a bad thing; one can use a step-down xformer to reduce V and increase I... never know until you try! 

I better get some sleep...
-Mark

[powercat]

3 new from TK
Orbette 3: New Rotor, New Magnets, Stronger Acceleration
http://www.youtube.com/watch?v=cGsuhcmI2NQ

Orbette 5: Orbette Powers a Load! Well, sort of
http://www.youtube.com/watch?v=7WuLb-8vj4k

Orbette 6: External Bias Improves Performance
http://www.youtube.com/watch?v=ZIwg3dKOcS0

cat

[rave154]

Tinsel,

nice videos,

i noticed in your last 3 vids, you have your toroid positioned at an angle with respect to the "cylinder" /  rotor in stead of pointing it "straight-on" .. have you experimented with this positioning to see the effects on speed /  current draw etc?

David. D