Engineering ToolBox - Resources, Tools and Basic Information for Engineering and Design of Technical Applications! Speed of an operating electrical motor with load is lower than the synchronous speed (no load) of the motor.
Synchronous and approximate speed (rpm) at rated load for small and medium motors operating at 60 hz and 50 hz:
Electrical Motors - Speed at Operating vs. Synchronous Load No. Poles Approximate Electrical Motor Speed (rpm) Speed with Rated Load Synchronous Speed (no Load) 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 Related Topics Electrical units, amps and electrical wiring, wire gauge and AWG, electrical formulas and motors. Related Documents Calculate electric motor efficiency. Operating speed of an induction motor depends on the input power frequency and the number of magnetic poles in the motor. Full load operating torque vs. break down, pull up and locked rotor torque. Inductive loads and power factors with electrical three-phase motors.
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