Electrical Motors - Speed at Operating vs. Synchronous Load

Speed of an operating electrical motor with load is lower than the synchronous speed (no load) of the motor.

Approximate Electrical Motor Speed (rpm)
2	3450	2850	3600	3000
4	1725	1425	1800	1500
6	1140	950	1200	1000
8	850	700	900	750

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Electrical Motors - Speed at Operating vs. Synchronous Load

Speed of an operating electrical motor with load is lower than the synchronous speed (no load) of the motor.

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Scientific Online Calculator

No. Poles	Speed with Rated Load		Synchronous Speed (no Load)
Approximate Electrical Motor Speed (rpm)
No. Poles	60 hz	50 hz	60 hz	50 hz
2	3450	2850	3600	3000
4	1725	1425	1800	1500
6	1140	950	1200	1000
8	850	700	900	750