Muller Dynamo

[teslaalset]

Before trying all kind of coil winding configurations to increase your induced voltage, have a look at some basics:

- try decreasing the  distance between rotor magnets and stator cores
- check the cores are not saturated when rotor magnet is at TDC (bias magnets should fully neutralize the rotor magnet flux in the stator cores. In the optimal situation this is done while having a load current through the coils in the correct direction.
An indication to do this is to measure the coil value with an RLC meter while adjusting the bias magnets. Then finetune the bias magnets under load.
- you might use the wrong ferrite cores. There are many different kinds, use the ones with highest max. permeablility. Selecting the right core material is of course the most nasty one.

Main message here is: pay attention to the bias magnets. They enable you to have the highest coil values at the right orientation of the rotor. A (partly) saturated core will have much less voltage output because the permeability at (partly) saturation can be a factor of 10 less or more.

[penno64]

Get your head around this one from Slider over at EF -

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

Penno

[mariuscivic]

Get your head around this one from Slider over at EF -

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

Penno

Now, this is what we are looking for!
Thanks for the video

[Tudi]

Get your head around this one from Slider over at EF -

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

Penno

damn, what a weird video. I'm not sure that is exactly what we are looking for. Can you check the RPM without the presence of the gen coil ? Maybe it speeds up because the lightbulb instead shorting the coil makes it an open circuit ?

[xenomorphlabs]

Get your head around this one from Slider over at EF -

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

Penno

That sounds basically like the bifilar connected at one end.
with one winding having a (slightly) different resistance than the other.
Hmmm