Re: [TCML] How To Turn A Vacuum Cleaner Motor Into A Synchronous Motor

[Futuret <futuret@xxxxxxx>]

Hi,

Excellent work, and a fun project !  The start-up sounds really cool !  
Now I'm curious if this type of sync motor will work with my phase 
controller circuit.  I agree with Clive that it will probably work.

It would still be interesting to see what happens if the opposing 180 degree
segments are merely shorted (no diode).  Maybe Clive tried that
and it didn't work??  It will also be interesting too see how Clive's
and the other fellow's idea of diode-ing across less than 180
degrees works out.  

Are you still going to try adding some resistors Stefan just to
see what effect it has?  

Cheers,
John

 

 


 

 

-----Original Message-----
From: Teslalabor <teslalabor@xxxxxxxxxxx>
To: Tesla Coil Mailing List <tesla@xxxxxxxxxx>
Sent: Fri, Dec 17, 2010 10:48 am
Subject: Re: [TCML] How To Turn A Vacuum Cleaner Motor Into A Synchronous Motor


Hi,



I think today I was able to make a vast improvement. The key is, not only 

soldering 2 segments, there have to be soldered at least 2 segments on each 

side together.



After soldering 2 segments on each side, the "crazy-mode" completely 

disappeared, as you can see in this video, and the motor becomes 

selfstarting:



http://www.youtube.com/watch?v=n0uJiIwhpq8



Then I soldered another segment on each side and the motor gets more current 

and therefore more power and the sync gets much more stable, I think the 

more segments, the heavier the load the motor can accelerate:



http://www.youtube.com/watch?v=nAK5eAKoZHk



And then, with 4 segments on each side, the motor runs quiet perfect:



http://www.youtube.com/watch?v=iNyOuBh9vaA


It is self-starting from every starting position the armature has. And, I 

recognized, that it is important to apply voltage to motor fairly abruptly, 

as David Sharpe said, not with a variac.


So, I think even more segments could be soldered but then it will be 

necessary to reduce the current with additional resistors in series with the 

diodes. There will be a "sweet spot" of the optimal amount of segments but I 

am to lazy to find it out ;-)


Best Regards

Stefan





 
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