SINGLE-PHASE MOTORS 



299 



which in turn produce a torque sufficient to start the motor. 

 The shaded pole is not a common method of starting single-phase 

 induction motors and is used only in motors of very small size. 

 It will be remembered that this same shaded-pole principle is 



FK-. L'78 (a). Rotor of a Wanner sin^lo-pli -i.- typo BA motor 



1:19 



-'78 (6). Wagti' huso induction motor. 



used as the l.Vht-lnad adjustment in the induction watthour 



meter (866 p:i'J l 64). 



The ])i-rc(Mlin^r methods Of Starting tin- Hn-l-'-phasc induction 

 motor produce very we.-ik starting innpiis \\liicli are insuflicient 



