Muller Dynamo

[infringer]

Hard drive bearings are not rated for the weight of these rotors I would suspect they will not have that long of an operational life. I could be totally wrong though but from what I recall from previous projects I have seen people do cd rom bearings, hard drive bearings, and VCR all seem to have a quick failure rate cause of the weight they were trying to handle and they were not built for that excess ....

Anyhow I wish you all luck but for a final build I would suspect it will take a bit more durable hardware to run at these speeds for durations of hours or maybe even weeks or years depending on how we can further improve this design maybe we could make a digital battery disconnect circuit to charge up the cap once it it at a certain level then recharge the battery when that is at a certain level as well.

[e2matrix]

Thanks Jim!  Looks like you are well on your way to a very nice build. 

[CLaNZeR]

Picture Bottom Stator plate eventually cutout, took a lot of hours and Top Stator plate on the machine now.

Here is a picture of it cutout and M4/M3 threaded brass inserts press fitted.
The channels are to run the wires in.

Picture attached of Coil side populated.
Switches will swap polarity of coils.

And picture Connection side with washers for the biasing magnets.

Just got to run the wires now

There is no way the top plate will be finished tonight, so will have to wait till next weekend.

Cheers

Sean.

[e2matrix]

Hard drive bearings are not rated for the weight of these rotors I would suspect they will not have that long of an operational life. I could be totally wrong though but from what I recall from previous projects I have seen people do cd rom bearings, hard drive bearings, and VCR all seem to have a quick failure rate cause of the weight they were trying to handle and they were not built for that excess ....

Anyhow I wish you all luck but for a final build I would suspect it will take a bit more durable hardware to run at these speeds for durations of hours or maybe even weeks or years depending on how we can further improve this design maybe we could make a digital battery disconnect circuit to charge up the cap once it it at a certain level then recharge the battery when that is at a certain level as well.

I think you may be right about HD bearings and such although it's a cheap and easy way to put together a proof of concept.  I do have a hard drive with about ten 14" diameter platters so that would probably handle the weight    That hard drive weighs about 45 pounds.  Just don't think it will quite fit this project but I'll bet some of the much older 5 1/4" full height hard drives would handle this if you can still find any of them. 

[Bruce_TPU]

I have learned from my Bedini machines that sometimes these things work better when the rotor speed is limited or braked down. ( mecahnical loads-remember Bedini used fan blades on some of his machines)---
If you are concerned about overspeeds or want to keep the rotor to a certain rpm window I suggest an eddy current brake in the form of some piece of aluminum next to the rotor. This might also help to keep the speed within the limits of the dc to dc converter. Perhaps one could do away with this entirely and use the eddy current brake to avoid a runaway situation where the thing jumps off the table at ridiculous rotor speeds!
I keep my fingers crossed and hope that some of you might get this to run soon!

You are correct.  Romero mentioned a "lower" RPM output to use and everyone thought it is a "typo".  but I now believe from my own tests, that I know the reason why...

With ALL SAME polarity magnets, facing their coils at any one given time, the following becomes the problem....

It is a changing field, that the coil must see.  Because of the polarity being identical, what the coil sees is the following... North, time, North, time, North, Time, and on the other side, the coils see, South, time, South, time, etc.  Now, herein lies the dillemma, as the RPM's pick up speed, you can actually see the power go DOWN on each coil, because, the coil will stop seeing a changing field, but will only see North, North, North, etc.  So.o.o, a word to all of the builders, because the polarities are not South,North, South, North, etc, but all the same, there WILL be a tuning needed to find the BEST RPM to operate the machine for maximum induction.  My guess, is that it will be close to the RPM's quoted by Romero.

My problem on my rig, was using a giant coil, and added 4 more magnets, all with the same polarity facing the coil, as the first four.  Instead of seeing an increase in power, I saw a sharp decline in power, due to the reason above.  I was able to switch my mags to N,S,N,S, etc and it is NOT a replication of Romero's device, but only a test bed.

Anywho, I hope this helps someone replicating!

Cheers,

Bruce