Muller Dynamo

[toranarod]

@toranarod: thank you for the instant answer and the educational photo. I just had a look at eBay. It seems one can have Western Digital hard disk drives starting at 15.-- Euro (from Germany). Now I know what to look for.

Do you do anything special for balancing your rotor (besides trying to be precise when placing the magnets)? I guess you turned the rotor with a lathe?

Please excuse my stupid questions. I try to learn how to build a decent mechanical set up.

(I am already looking for an old VCR, because some builders used a rotor from a VCR for mounting a fast turning disk, e.g. in a Bedini motor.)

I have got this encoder plus disk
AVAGO TECHNOLOGIES - AEDB-9140-A14 - ENCODER,3CHANNEL, 500CPR, 5MM+DISK
Farnell Order Code 1161089
and want to use it to control a Muller Generator replication with a TI Launch Pad.

Your PIC schematics for driving a pair of drive coils helps me a lot.

Unfortunately I only got a rather small lathe which only allows to turn objects with a diameter of less than 75 mm (to small for 200 mm disks). But I can turn a good axis with a 5mm end for the encoder disk.

Greetings, Conrad

For balancing? All you can do on a budget is machine them the best you can and try to make it uniform.
I don't think the high RPM that is discussed here all the time is possible or necessary when you are trying for efficacy. Romerouk was only working at 1200 RPM.
so balancing is not a problem.
I only have a drill press. I ask a friend to make some of my machined parts.

looking forward to seeing your builds. We need more experimenters to get new energy to move forward. if any of us here can help don't hesitate to post or email.

[toranarod]

I am double posting this same info over at my forums on the following thread
http://www.overunity.org.uk/showthread.php?1773-MULLER-Generator-free...

Will try to keep both upto date

***

Well I started and finished the coils today.


The wire that arrived was 7 x 0.250 and not 7 x 0.125


But I wound them anyway and will just have to wind some new ones when the correct wire turns up.

The rig is designed so the coils can be easly swapped out, so not a problem and be good to compare.


Ended up doing 120 turns and each coil came out at 0.8ohms each.


CNC machine is cutting out base plate as I type.

Wow I am very envious.
looks fantastic. I am really looking forward to your results I would like to know what voltage your coils put out.
   

[CLaNZeR]

looks fantastic. I am really looking forward to your results I would like to know what voltage your coils put out.

I think they will be lower because as they say, more windings, the higher the voltage.

But hopefully the RPM of the motor may help to keep it up there.

Also because of the resistance of the coils, we now have more current being pulled at higher voltages when driving, but more flux as such.

So all a trade off in many ways.

I think we will be safe with whatever configuration, as the effect seems to be the uneven magnet/coil arrangment.

We will see.

I was going to use 10mm Acrylic for the top and bottom stators, but the Acrylic I received is awfull, it melts as soon a you look at it. So now using 15mm but having down to 10mm around rotor area. So still in line with Remero spec.
Will make more sense when bottom base is cut out and I post a picture.
8 hour on the CNC machine so far, but getting there LOL

Cheers

Sean.

[gyulasun]

Hi Sean,

If you happen to have an L meter at hand, would you measure the self inductance of some of your coils?  Just for the record.

Thanks,  Gyula

[CLaNZeR]

If you happen to have an L meter at hand, would you measure the self inductance of some of your coils?  Just for the record.

Hi Gyula


Got most test/measurement meters this end, but a LC Meter is one thing I have not yet invested in.

Sorry mate

Cheers

Sean.