Electrical Motors - Speed vs. No. of Poles and Frequency

The speed of electrical motors with 2, 4, 6 or 8 poles at 50 Hz and 60 Hz. The speed at which an electric induction motor operates depends on the input power frequency and the number of electrical magnetic poles.

Poles	Frequency 50 Hz - Synchronous (rpm)	Frequency 50 Hz - Full Load (rpm)	Frequency 60 Hz - Synchronous (rpm)	Frequency 60 Hz - Full Load (rpm)
2	3000	2850	3600	3450
4	1500	1425	1800	1725
6	1000	950	1200	1150
8	750	700	900	850