Muller Dynamo

[mondrasek]

Itsu,

Sorry you missed it, but we determined that I am still running in series adding = normal generator mode.  So I have normal drag with load.  BUT I am still able to increase Pout with the backing (bias) magnets.  Initial testing showed this to increase the Pout/Pin ratio so it does not appear to load the system linearly.

As far as the RF stuff goes, it is a side study right now, unless I determine it is definitely causing Pout interference.  Doing a bit of testing now.

I am pretty sure the RF noise is due to the partial collapse of the EM field in the coils as they breach the "barrier" of the FWBR V drop + V in the Dump Cap.  At that moment the coil pairs appear to initially see the much greater resistance of the attached load.  This results in at least the partial collapse of the EM field as the coils begin to send current to the main load.

I can use the antenna on the little multiband radio kind of like a Geiger counter.  It deffinitely says the noise is radiating from the coils as the noise signals become much larger as I move the antenna closer or direct it to point at the coils.

I would guess that the noise frequencies are related to the length of wire in the coils.

M.

[mondrasek]

Milehigh asked that I should not assume a perfect DC output to the load just due to the big Dump Cap.  He suggested that I check it (w/oscope).  So I did.  AC ripple on top measures maximum of 6mV p2p.  This was with a load and RPM setting that was providing 8.08 Vout and 7.17 mAout to the load.

M.

[itsu]

Thanks for the info Mondrasek.

If you are "pretty sure the RF noise is due to the partial collapse of the EM field in the coils etc...",
then everybody having a similar setup should see/hear/detect this RF noise, and i have not yet heard someone else reporting this,
and i am not seeing it on my rig.

If you remove the FWBR/dump cap (open coils), does that stop the RF?
If you put a load (12V lamp) directly on your coils, does that stop the RF?

Regards Itsu 

[mondrasek]

Use decoupling capacitors (ceramic 100pF) to "ground" any voltage lines.

That is exactly the type of practical EE advice I need!

Added 100pF caps to ground the DC from the old Toshiba power brick that supplies my voltage regulator circuit and the regulated DC out of that circuit that powers the BLDC motor drive circuit.  I was not able to measure any change to RPM, Vin or Iin, but still a good addition to the circuit.  I have noticed that my DMM probe "antenna" effect does not appear at the lower RPMs I am currently testing, but maybe those caps will help with that issue at higher RPMs.

No change to the RF noise I can pick up with the radio, but didn't expect that anyways.

Thanks Itsu!

M.

[xenomorphlabs]

Okay, let's eliminate the noise source )
Have your tried getting your rotor up to full speed and then electrically disconnecting the drive motor that you are using to spin it.
That's the only difference between your device and other people's device i can see.
Do you have a university (radio station) near your house or transmission lines in the vicinity or a cellphone antenna station on/near your house?
Lastly if all that is negative, then build a simple faraday cage and whip it over the thing. That way you can eliminate or see a reduction of outside RF noise.
Good Luck