Muller Dynamo for experimentalists

[plengo]

Today I ordered from another source Litz wire with the spec from Romero. 36 AWG 7 strands (0.125mm) each strand.

It will be here by next weekend. I also going to replace my coils with those hand wound coils. I few things I learned with the current 156 ohms coils from relays.

The speed of rotation is below 15 rpm or so. Very little speed BUT it does have a good torque which is very surprising. I think the core that came with the relays causes the rotor to be very rigid, even after replacing my bearings and shaft with ceramic and 5mm shaft. Which I used many times and they spin very freely.

So the cogging with those powerful magnets and the not correct cores causes too much friction and very little rotation.

Another interesting thing is that with that setup I was also able to produce easily above 20v per magnet pass on the generator coils and running lamp loads. So less than 15 rpm and still producing good amount of energy and torque.

So lots to learn even from my mistakes. It is as if the magnets repelling force when overcomed also produces a very good acceleration that provides a very good differential therefore more energy out.
Also the torque is very strong since the repelling force is also strong. Very strange and not very intuitive to be honest. I know some "experts" will say that this is all conventional and very intuitive but I am not saying anything special either. So please spare me.

Fausto.

[hartiberlin]

Hi Fausto,
with the higher resistance coils, you just need higher
supply voltages.
Maybe you can try to use a 1:1 transformer from the 120 Volts AC grid ( You are living in the USA, right ? )
with a bridge rectifier
and cap and use this as the input voltage ?

Surely you can also try to use a few 12 Volts batteries in series to get a higher input voltage.

The only difference you might get is that the L of the coils is bigger, thus the motor would not run as fast
as the complex impedance is bigger and thus the RL timeconstants of the coils needs longer charging and discharging
times.

But with higher impedance coils you could also have less input power as it is also in Newman motors...

Hope this helps.
Regards, Stefan.

[plengo]

Ferrite made with black sand video by Peter Linderman:

http://www.youtube.com/watch?v=O4NBR0cl0b8

and how to make your own cores

http://www.youtube.com/watch?v=xA8HalLJ92c&NR=1

Fausto.

[plengo]

Hi Fausto,
with the higher resistance coils, you just need higher
supply voltages.
Maybe you can try to use a 1:1 transformer from the 120 Volts AC grid ( You are living in the USA, right ? )
with a bridge rectifier
and cap and use this as the input voltage ?

Surely you can also try to use a few 12 Volts batteries in series to get a higher input voltage.

The only difference you might get is that the L of the coils is bigger, thus the motor would not run as fast
as the complex impedance is bigger and thus the RL timeconstants of the coils needs longer charging and discharging
times.

But with higher impedance coils you could also have less input power as it is also in Newman motors...

Hope this helps.
Regards, Stefan.

Thanks Stefan, yes I did use my power supply with 30 volts to do just that and indeed it works with low speed at that higher voltage. What I am really surprised is the torque amount (felt by holding the shaft with my fingers tightly) and the good amount of voltage generated by those coils at such a low speed.

The cogging is bad and good. Bad because it takes a good amount of force to overcome and good because you get all back after overcoming TDC and the ratio of speed is really fast which creates a good rate of change and therefore higher induction. The coils also have much higher induction than Romero's coils, it is around 156mh as you stated correctly.

Fausto.

[powerunlimited]

Hi all,I have question romerouk pulled rf chokes from equipment and used the core
from the choke.Is the choke the same as sold by radio shack?Does the core fit thru the bobbin
with out either boring the bobbin or using a dremal tool to shave down the core.
If he did have to make the
core fit which method did he use boring the bobbin or shaving the core or both.