Muller Dynamo

[plengo]

I agree and was initially disappointed that adding the antenna wire caused the RPM to drop.  But I believe that the RPM rose when I first detected this anomaly with the DMM.  But that was also at a different resistance (about 10 Ohms lower).

I am hopeful that as I shorten this "antenna" the rotor behavior will change from an RPM drag to an RPM increase on one of the cycles.

If the resistance is a key to this puzzle it would be unfortunate.  Since I am basically destroying my magnet wire as I cut down this "antenna".  And I am now critically low on magnet wire.  I can buy more, of course.  But "Mr. Westinghouse" is not sponsoring my research so I do not look forward to further expenditures.

As luck would have it, my wife was in a bit of an incident involving her car and some inanimate (hopefully!) object late last night.  No one (that we know of) was injured. I have learned about it from the note she left for me only this morning.  So I will be staying home from work today in the name of "spousal support" and should have time to finish this antenna length investigation.

M.

This is amazing. It kind of matches what happens when I hover my hands over the motor while putting bias magnets and the total current to the load changes substantially. I mean, after I live the magnet in place just the hand causes that interference.

Why would ever a motor be sensitive to one's hands??? This is starting to sound like Dr.Stiffler SEC field of a kind.

Fausto.

[poynt99]

without the bias magnets I get about 1/2 of the voltage when with bias magnets.  Same for current.

Also the bias magnets somehow helps in achieving a higher RPM while still getting power out.  It takes forever to find the right places for them and for each one I have to wait for the rotor to accelerate and stabilize so time for the next bias magnet is right.

If I just manage to run without the bias magnets and get the maximum speed, which is about 1200 RPM, than turn on the load it will create around 150ma over 7volts output on the lamp and off course rotor will in few minutes reduce speed to 50rpm or literally stops.

With bias magnets it will not stop but only loose about 200rpm in speed.

Fausto.

You're getting about 14V @~300mA (4.2W) out with bias magnets, vs. about 2.1W without bias magnets?

I am curious what the difference in INPUT power is for both cases?

Thanks,
.99

[chrisC]

without the bias magnets I get about 1/2 of the voltage when with bias magnets.  Same for current.

Also the bias magnets somehow helps in achieving a higher RPM while still getting power out.  It takes forever to find the right places for them and for each one I have to wait for the rotor to accelerate and stabilize so time for the next bias magnet is right.

If I just manage to run without the bias magnets and get the maximum speed, which is about 1200 RPM, than turn on the load it will create around 150ma over 7volts output on the lamp and off course rotor will in few minutes reduce speed to 50rpm or literally stops.

With bias magnets it will not stop but only loose about 200rpm in speed.

Fausto.

Good job Fausto! Please continue your efforts. Your results are similar to what I've obtained about 4 weeks ago, before I had to be away and still not have time to continue work on this motor. Hopefully I'll get time after August to continue.

cheers
chrisC

[neptune]

Re the antenna effect , there are two possibilities here . The wire just might be acting as one plate of a capacitor . with the "cyclic " effect , it is more likely to be acting as an antenna . If from your data you can find the length of a quarter wavelength , that is the length  of wire that will probably give the greatest effect . cut a wire to say 20 cm longer than this length and cut it 1 cm at a time to get best results . Now you can calculate the frequency involved . Determine the wavelength in metres . For example say 30 metres , Now divide 300 by this figure to give you the frequency in Mhz ., so in this case 10Mhz . Does this form a simple ratio to your RPM , or RPMx number of magnets ? This might give us some clues as to what is happening .

[mondrasek]

Re the antenna effect , there are two possibilities here . The wire just might be acting as one plate of a capacitor . with the "cyclic " effect , it is more likely to be acting as an antenna . If from your data you can find the length of a quarter wavelength , that is the length  of wire that will probably give the greatest effect . cut a wire to say 20 cm longer than this length and cut it 1 cm at a time to get best results . Now you can calculate the frequency involved . Determine the wavelength in metres . For example say 30 metres , Now divide 300 by this figure to give you the frequency in Mhz ., so in this case 10Mhz . Does this form a simple ratio to your RPM , or RPMx number of magnets ? This might give us some clues as to what is happening .

Working on it.  Taking data now (looooooong process).  I have to wait for the system to settle into a stable RPM after each cut of the length of the antenna wire.

I came down to the computer to start entering the preliminary data.  Probably 60 or 70 data points of RPM vs. "antenna" length so far.

It looks cyclical in numbers, but I am anxious to see what a graph of the data might show.

M.

PS.  @neptune, are you an RF and/or HAM guy?  Also, who is your past friend Bill that you mentioned earlier (my condolences for your loss).  He sounds like an interesting individual.  Was he on these forums?