Re: [TCML] Synchronous Motor Question

[futuret@xxxxxxx]

 Miles,

1)  When an induction motor is modified by grinding flats on the squirrel cage
rotor, it becomes a salient pole reluctance sync motor.

2)  Not all sync motors have fixed poles, therefore not all sync motors are salient
pole types.  A hysteresis motor does not have fixed poles, therefore it is not
a salient pole sync motor.  

3)  Yes, the RPM will tell you if it's a sync motor, but it won't tell you if it's a
salient pole sync motor.  

4)  Usually hysteresis sync motors are labeled as such, but I have no idea
if this "always" true.   

Cheers,
John

 


 

 

-----Original Message-----
From: Miles Mauldin <teslamiles@xxxxxxx>
To: Tesla Coil Mailing List <tesla@xxxxxxxxxx>
Sent: Wed, Mar 3, 2010 10:52 am
Subject: [TCML] Synchronous Motor Question


Still looking around for a synch motor, or a reluctance motor to modify.    
Since synchronous motors have fixed poles would that not mean they are also 
salient pole? The rated RPM should signify if the motor is synchronous right?  
Is the below motor a synchronous motor? Any problem with the horsepower?

Fuji Electric GBL 1943-5A Specifications: • 115 VAC • 1/25 HP (Approx) • 1800 
RPM • 0.65 Amps • Thermally protected ventilated housing • CCW facing shaft • 
Capacitor start (supplied). • Shaft 1/4 dia. x 1-3/8 long with flat. • Size 
3-5/8 Dia x 3-5/16" long. New. 
 
or
 
Franklin Electric 1506770400 Specifications: • 115 VAC • 1/30 HP • 1800 RPM • 
1.4 Amps • Thermally protected • Continuous duty • CCW Rotation • Permanent 
Split Capacitor start • Shaft 2"L tapered for3/4"; 1/2" threaded end 1/4"-20 
thread. Motor size 3-3/4" dia. x 4"L. Excellent condition. 
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