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

[Futuret <futuret@xxxxxxx>]

I wonder if the motor could be easily rewired to convert it to a shunt wound motor
(instead of series wound), and then run it on rectified DC voltage.  This
might result in a steadier speed, when used with Clive's modification,
(or by replacing the diodes with a short, or whatever works/helps).  This
might help overcome the voltage input sensitivity and eliminate the "crazy mode",
Just a thought.  I haven't worked much with shunt wound motors.  

In a shunt wound motor, the speed can be adjusted by controlling the 
armature voltage, the field voltage can remain constant.  This might 
permit the motor to remain in sync with a heavier loading.   

Cheers,
John

 

 


 

 

-----Original Message-----
From: Futuret <futuret@xxxxxxx>
To: tesla <tesla@xxxxxxxxxx>
Sent: Thu, Dec 16, 2010 9:19 pm
Subject: Re: [TCML] How To Turn A Vacuum Cleaner Motor Into A Synchronous Motor


Stefan, Clive,

I wonder how the torque compares with the usual modified 
induction motor sync torque?  

I wonder what would happen if two more diodes were added at

90 degrees on the commutator (this could only work if there

are the correct number of segments on the commutator).


I wonder also if just cutting the two 120 degree opposed segments

free from the winding would also give a sync result?  Or maybe

just short together the 120 degree opposed segments (no diode)? 


Someone suggested shorting two segments together at each side

to give a "wider" effect.  That might be something else to try.  

Clive does your motor self-start?  

Cheers,
John



 



 



 
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