Muller Dynamo

[gyulasun]

Hi Laurent,

My questions lol

What load do you use at the DC output? (please use either a light bulb Romero used BEFORE the looping or use a 15-20 Ohm high wattage resistor if you have no lamp at hand)

Do you have 7 individual diode bridges that terminate in a common puffer capacitor?

HEre is some info from Romero earlier posts:
http://www.overunity.com/index.php?topic=3842.msg284177#msg284177
http://www.overunity.com/index.php?topic=3842.msg284234#msg284234
http://www.overunity.com/index.php?topic=3842.msg284275#msg284275

This is for now, must finish.  Do not loop yet, use a load and measure DC output current and voltage and compare it to the input power. (Beware, your higher than 16V DC output may ruin the DC-DC converter input circuits as an overvoltage for them)

Gyula

[ElectronManipulator]

If the COP is 10, efficiency is somewhat moot. If COP is 1.1 it is of paramount importance.

You are pushing for improvements in efficiency, and well you should. I think that most folks here are still in a mode of trying to prove that COP > 1 is possible, and once that is proven, efficiency starts to matter a great deal more. If you want to get everyone's attention, offer an experiment that demonstrates COP > 1...you'll have their undivided attention.

If the COP is .9 and you are going for 1.1, it is of substantial importance.

Ceramic, non-lubed, bearings are very close to "friction-less" as most folks can get.

Ceramic balls are >60% lighter, >50% stiffer, >70% smoother, and much, much harder than steel balls. Ceramic balls have >100X better rolling contact fatigue life in comparison to Vacuum Melt 52100 Steel.

from http://www.spsspindle.com/quantum/ceramic_steel.php

Using a plastic pyramid with a magnetic bearing-in-cup at the tip (Far enough away from the magnetically controlled rotational function) you can get zero contact friction.  With all I have seen this group build, that should at least be a standard "tool-box" part

If you are just (just) looking for proof of concept, an air bearing would be of great help.

It can handle substantial weight, and can be done quite effectively with a laser cutting device.

However, as I have also read, there has been trouble balancing.  The "cheat" around this is to use mechanical bearings to an extent.

Thicker, heaver materials can help with this significantly.  It COSTS to build bigger, and building on a small scale as a proof of concept is very attractive.  Access to proper tools and tooling is very important for functional accuracy.  Especially when dealing with magnetics.

I understand the feeling of not wanting to "use power" to float the device, BUT, once you can afford proper bearings, that is a write-off.  You KNOW with more money comes greater accuracy and less friction.

A great education can be had by spending the time spacing and balancing your magnetics, as many on here apparently can attest to.

Any off balancing IS RESISTANCE and thus requires more power (P=IR)

Resistance can be to your advantage in many cases. During power generation for example.

I have not built Mr. Mullers dynamo, but one thing stands true. Any recovered losses should be used.

Capture and charge a cap with WHATEVER you have available. This is as close to free as you can get.

Only load the dynamo when you can afford to.  If a designed load is cogging the magnetics, you only have two choices.  Reduce load or add power.

The cap can be discharged as soon as the load is set, in pulses (like the human heart), and the load is disconnected when the cap charge reaches a cutoff point.  (A point where the load would start excessive cogging).

Simple semiconductor switches can be employed to do this.

If anyone needs help with microprocessor coding, I would be glad to offer a hand.

I mentioned, as did another member, germanium diodes.  There is no reason not to use them.

There is NO REASON to use a per-manufactured bridge! NONE!  You are incurring losses you can avoid instantly! As they tend to use diodes rated much higher than seen circuit requirements.  The higher the rating, the worse the losses at lower currents.

Why use a 10 amp (or more) rated bridge if your circuit will not see more than half an ampere?

[minde4000]

Thought I would share this video that RomeroUK sent me before the Muller Replication.

He managed to get motors to speed up before when applying a load, but the Muller Design enabled it to go to the next level and be self sustaining.

http://www.youtube.com/watch?v=mEaY17NeK_I&feature=channel_video_title

Do not ask me too much on this setup, but it uses the same circuit and same feedback circuit for harvesting the output of the PU.
The core in this pickup coil is MU-Metal.

Cheers

Sean

   Open circuit coil acts as a load appereantly. However dead shorted circuit coil acts more like magnetic flux capacitor (or mechanical spring) and has little losses  and unloads prime mover so one can see acceleration.  Now in your video you might tend to think that shorted coil provides acceleration. This is just illusion. Its easy to figure this out by measureing rpm with shorted coil and then measuring rpm with coil removed all together. Removal of the coil will provided greater acceleration or increase in rpm then the one shorted. So no free lunch there. And why would open circuit coil act as a much greater load than shorted I am not sure (oversaturates?). All this I have observed with my thane heins replication. As far as I am concerned his theories were wrong. Just my opinion.

Minde 

[e2matrix]

ElectronManipulator,  Thanks for all your tips here.  Lots of good info.  You have mentioned some things I have not seen like a magnetic pyramid for a bearing (although I can somewhat picture it).  Do you have any pictures or links to these?

[i_ron]

   Open circuit coil acts as a load appereantly. However dead shorted circuit coil acts more like magnetic flux capacitor (or mechanical spring) and has little losses  and unloads prime mover so one can see acceleration.  Now in your video you might tend to think that shorted coil provides acceleration. This is just illusion. Its easy to figure this out by measureing rpm with shorted coil and then measuring rpm with coil removed all together. Removal of the coil will provided greater acceleration or increase in rpm then the one shorted. So no free lunch there. And why would open circuit coil act as a much greater load than shorted I am not sure (oversaturates?). All this I have observed with my thane heins replication. As far as I am concerned his theories were wrong. Just my opinion.

Minde

Well spoken, yes, remove the coil and establish a base line first. Then the acceleration illusion becomes readily apparent.

My opinion too!

Ron