Muller Dynamo

[scratchrobot]

You seem to be doing fine with the rotary version, solid-state version can come later when we can master rotary version...

How your input power (current) changes when you turn the back magnets and RPM goes up?

Thanks,  Gyula

The amp draw doesn't chance much but the output also doesn't change much only the RPM.

Thank you,
scratchrobot

[teslaalset]

I agree I think there has to be some sort of self shortening effect goeing on like you describe!
When I see the Kromrey converter I also see no shorting circuit but a constand 100% short.

Regards,
scratchrobot

Ah, good to know the Kromray converter has a dead short, I didn't know that.

I guess it will have to be a compromise anyway.
Like I said, how will it be possible to get the energy from a shortened coil?
You could use extra conventional generator coils to the rotor, but that will give you extra BEMF drawback.
So, IMHO using a bridge rectifier with some extra parallel diodes and a buffer capacitor is a good compromise, although I realize that some of the replicators don't understand how such circuit acts as selective shortening.

[gyulasun]

The amp draw doesn't chance much but the output also doesn't change much only the RPM.

Thank you,
scratchrobot

Try to use spacers between the magnets to find the most optimum flux 'quantity' for the core.  For the fine-tuning process, perhaps a normal resistor of a few Watts rating could be better as a constant load (bulb is nonlinear and changes its loading effect as the output voltage changes).
Load resistor value could be 5-10 Ohm and use an AC voltmeter across it to see any increase or decrease in the output while adjusting. These hints I collected mainly (not all) from Romero posts...

[scratchrobot]

Ah, good to know the Kromray has a dead short, I didn't know that.

I guess it will be a compromise anyway.
Like I said, how will it be possible to get the energy from a shortened coil?
You could use extra conventional generator coils to the rotor, but that will give you extra BEMF drawback.
So, IMHO using a bridge rectifier with some extra parallel diodes and a buffer capacitor is a good compromise, although I realize that some of the replicators don't understand how such circuit acts as selective shortening.

You make the same mistake and are adding more components then needed and making it more complicated than this simple thing already is.

The Kromrey converter speeds up under load and has only 4 coils and 2 magnets nothing more!!

I think that is the effect we want to know why it works that way without extra components like capacitors or diodes or extra coils. Then we can use that in other motors.

Regards,
scratchrobot

[scratchrobot]

Try to use spacers between the magnets to find the most optimum flux 'quantity' for the core.  For the fine-tuning process, perhaps a normal resistor of a few Watts rating could be better as a constant load (bulb is nonlinear and changes its loading effect as the output voltage changes).
Load resistor value could be 5-10 Ohm and use an AC voltmeter across it to see any increase or decrease in the output while adjusting. These hints I collected mainly (not all) from Romero posts...

I will try a different (constant) load and an AC voltmeter next time, I already played with spacing but maybe my magnets are also to big.

Thanks,
scratchrobot