Muller Dynamo

[romerouk]

Hi Romero

how a lot of question and thank's so much to have this patience.

I am at my shop and doing the rotor. I would like to be very near from your config.

So I have a small problem. If i take some measurement on your set up and my CAD drawing, it seems that the spacing between magnets arround the disk  is not correct if i use 20mm diameter magnet on a 25 cm rotor disk.

On my CAD design or the rotor is 25 cm and in this case the magnet should be 25 mm diameter, or the rotor is 20 cm diameter and the magnet are 20 mm diameter

Can you please remeasure your rotor disk diameter and 20 mm magnet diameter.

( on the pix the black circle are the magnet 20 mm and the red circle are the coil with the 6 mm ferrite core  the rotor is 20 cm diameter. the wood rotor bottom is 25 cm and you see the 20 mm diameter magnet seems very small on this disk)

Many thanks

Good luck for the future

Laurent

Hi,
I have measured the rotor and it is 20cm, sorry. I had so many changes and I also had a 25cm and a 35 cm rotor in another setup.
Diameter has nothing to do with the results if u space the magnets equally.
Based on previous tests larger diameter  = better results.
All other dimensions are 100% correct.
I have just tried to have the device running on the side and even upside down.
On the side looks the same but upside down slows down a lot.It might be nothing, maybe the way the bearings are behaving in contact with the shaft, I am not sure yet.
I am trying now to have it suspended with a piece of cotton string and do a video.

[romerouk]

I believe I read that he is using two hall sensors.  I also believe I read that we are trying to activate the pickup coils at TDC of the magnet.

Which of those two statements are incorrect?  Or both?  With a 9/8 ratio of magnets to coils, and only two hall sensors to set trigger points, I don't see how it is possible for each of the coils to activate at the same relative position to the nearest approaching magnet.  Looking at the CAD drawing woopy took a photo of illustrates this.

Wouldn't it be the case that each coil would need its own hall sensor?

Thanks Rom!

The 2 driving coils are running independently, not activating at the same time, that is what I need, to have the second coil activating when the other one is completely off

[woopy]

Thank's a lot Romero

and now lets go drilling

yepeee

Laurent

[gotoluc]

Hi,
I don't have a glass that size but I will organise something like having it hanging with a piece of string, maybe that is even better.

Hi romerouk,

thank you for the reply and offer. I would not want you to waste your valuable time at this point.

Using wires to hold it up would only bring more questions as they could be used as conductors.

The best way would be to use a glass but the generator needs to be away from the supports. You also need to replace that large Capacitor. It looks like it's much higher voltage value than you need. Replace it with the same uF value but in the voltage range your generator is working in, then it would be much smaller so people couldn't say you have Laptop batteries in there.

If you cannot do the above then don't spend time on it as it would not help.

Thanks for your time.

Luc

[neptune]

A plea to all computer wizz kids . I would not know a cad if it jumped up and bit me . Could someone post a diagram of two circles ,with lines radiating from the centre to the circumference . One circle to have 8 spokes and one 7 spokes . Then one could print these , stick them to discs , and use them as a drilling guide for rotor and stator . Just a thought .