Muller Dynamo

[Rosphere]

These recent replications share one thing in common with Muller's original:

I remember the noise in Muller's video.   I had always assumed that it was a balance issue or a bearing issue.

The noise is a sort-of knocking or tapping sound.

When I first saw, and heard, the romerouk video, I noticed the same type of sound.

Again, that sound, with the lasersabre video.  He said something needing tightening down, but I am starting to wonder how successful he will be to quiet this beast.

The sound almost reminds me of the crackle of the pistol shrimp.

Anyone else notice?

[teslaalset]

The 'knocking' may be caused by slight difference between upper and lower driving coil 'pushing' a rotor magnet. The rotor will move slightly vertical due to that.

[khabe]

There are large and comparably thin rotor disc and stator plates what act like music instruments (sonance), like bandstand 
Rotor/stator mutuality amplified acoustically through mentioned disc and plates.
At that none has dynamically balanced his rotor  surely gives lot of noise, especially when cheesy shaft and loose bearings.
But dont worry about, its hard to make it very silent, needs precise work, additionally to good building materials also damping materials and will take a lot of time and money. Just try to static balance as much as possible.
cheers,
khabe

[nul-points]

There are large and comparably thin rotor disc and stator plates what act like music instruments (sonance), like bandstand 
[...]
But dont worry about, its hard to make it very silent, needs precise work, additionally to good building materials also damping materials and will take a lot of time and money. Just try to static balance as much as possible.
cheers,
khabe

good advice, khabe, thanks

pax?

np


http://docsfreelunch.blogspot.com

[toranarod]

These recent replications share one thing in common with Muller's original:

I remember the noise in Muller's video.   I had always assumed that it was a balance issue or a bearing issue.

The noise is a sort-of knocking or tapping sound.

When I first saw, and heard, the romerouk video, I noticed the same type of sound.

Again, that sound, with the lasersabre video.  He said something needing tightening down, but I am starting to wonder how successful he will be to quiet this beast.

The sound almost reminds me of the crackle of the pistol shrimp.

Anyone else notice?

I brought this up back a page 97 of this post


I have been doing some test?

Remember he said a few time he would test it until the people next door complained. I think this is a very big clue.
how could a little pulse motor make so much noise? Well it can
and I believe now it is an attraction motor .
in attraction mode the motor cannot pass TDC if the pulse duration exceeds TDC it collides with the magnetic force on the way out.
its important to pull the magnets into the coils right up to TDC. this is how we get the torque and why the gap is important.
Also have any of you looked at the Robert Adams cold current reversal.
when ever the timing is correct they Knock so bad they jump of the bench. Only when it is doing this are you near ware Over Unity.

I was sure we where on to something when Romero said it disturbed the people next door.

this is my motor in attraction mode. see how close the last pulse is to the TDC point.

one other thing.  in this wave form the coils resistance is 0.5 OHM and it is running on 24 volts The current it is drawing in RMS at 1200 RPM is 180Milli amps