Muller Dynamo

maw2432 · July 24, 2011, 07:56:19 AM

Quote from: mariuscivic on July 23, 2011, 06:27:02 PM
Looks like the magnet kicker circuit is working

http://www.youtube.com/watch?v=5_T3jflh1jQ

Thanks Marius, What voltage did you use? Nice demo.

mariuscivic · July 24, 2011, 08:11:43 AM

Quote from: maw2432 on July 24, 2011, 07:56:19 AM
Thanks Marius, What voltage did you use? Nice demo.

Well, i didn't measured but i think it was around 12-15V.The 2n3055 is geting realy hot . In order to get the max rpm i had to change the position of the ''senzor coil''(the square one).If the senzor coil remains fix, it won't get the max rpm

maw2432 · July 24, 2011, 08:32:34 AM

Quote from: mariuscivic on July 24, 2011, 08:11:43 AM
Well, i didn't measured but i think it was around 12-15V.The 2n3055 is geting realy hot . In order to get the max rpm i had to change the position of the ''senzor coil''(the square one).If the senzor coil remains fix, it won't get the max rpm

The magnets you are using looks like old hard drive magnets. I suspect your transitor on time is quite long. Not sure.
I know the kicker coils and the very small transitor from the Kinetic art toys do not get warm at all.

Bill

wattsup · July 24, 2011, 08:57:14 AM

@mondrasek

I am also following your testing. Of course experimenting is the best method with whatever is the result you learn both ways.

I would like to ask you to possibly try something very simple. Can you measure the inductance of your two series drive coils separately. Then try to find any small AC transformer coil where either the primary or the secondary having equal or more inductance then the drive coils counted together. Put that transformer pri or sec in series with the drive coils but not on the pulsed side. Then try your wheel without loading the gen coils to see if you can notice any changes in rotation speed, torque, stability, etc. Then take the other side of the transformer coil and see which is positive and negative. Via a small diode on the positive connect to a high uF capacitor just to see if it will load.

If it is interesting enough, then connect the capacitor in parallel to your battery and eventually try to remove the battery while the wheel is turning. Do all this without loading the gen coils for now. Output is not important. Only to see if the effect on the drive side and see if some energy can be returned back to the battery. If this shows some promise, then it is only a few steps away from an even better driving method.

wattsup

mondrasek · July 24, 2011, 09:55:23 AM

@wattsup, sorry, but I am not driving this system with a pulse motor. It is driven by a brushless DC motor. The motor and spindle are from an old SHARP VCR. The drive circuit has a Mitsubishi M56732AL IC and a hall sensor for sure. The service schematics (found by Gyula) shows it to be a 2 phase motor with three hall sensors, so the hall I can see might actually be an array of three. That hall unit has at least 4 connections so I would believe it is more than a single. I forget the number of stator poles on the actual motor, but Gyula might still have the picture he found on the net. I have that link archived at work so I cannot get to it from home now. If it is important to anyone I can post it tomorrow, or Gyula may post it for us.

M.