Re: [TCML] Salient Pole Query

[futuret@xxxxxxx]

Phil,

Yes, it's because you're in the UK that hte motor is 1425rpm.
After you modify the motor it will run synchronous at 1500 rpm.

Yes, the motor is suitable.

I always ignore the dead pole concept.  I just make the width of
the  flats a certain proportion of the total armature diameter.
After modification the motor will run hotter and have less torque.

The dead pole concept may become more important for much
larger motors.

1/4 the dia of armature works well.  So if your armature is 3" dia,
then make the flats 3/4" wide.  Since you have a four pole motor,
grind 4 flats.

I show my electronic phase shifter circuit for adjusting the sync
phase at my website:  (also some sync rotary gaps can be seen there.)

  http://futuret.110mb.com

John



-----Original Message-----
From: Phil Tuck <follies@xxxxxxxxxxxx>
To: tesla@xxxxxxxxxx
Sent: Mon, 1 Dec 2008 5:16 pm
Subject: [TCML] Salient Pole Query



Hello.

I am thinking of a SRSG as my next 'project' and have looked into 
salient
pole motors converted from induction motors. My own motor has very 
little
info on the label so I am unsure as to its suitability.

The website at

http://evolve000.4hv.org/tesla/tc2srsg.html

describes the work involved and my motor does indeed look similar, 
although
my armature has individual segments on its surface, whilst the webpage
example has a plainer looking armature.



Could someone look at my temporary page at

http://homepage.ntlworld.com/follies/temp/temp.html

and let me know if my motor is indeed suitable.

My motor though is rated at 1425 rpm, while the web article only 
describes
1750 (needs 4 flats) & 3450 (needs 2 flats) rpm motors however.

I am UK based at 50 cycles is that the reason for the difference?



Regards

Phil

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